SiUS121502E Service Manual 2/3/4MXS-N Series [Applied Models] z Inverter Multi : Heat Pump
SiUS121502E Multi-Split Type Air Conditioners 2/3/4MXS-N Series zHeat Pump Indoor Unit CTXS07LVJU FTXS09LVJU FTXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FDXS09LVJU FDXS12LVJU CDXS15LVJU CDXS18LVJU CDXS24LVJU FVXS09NVJU FVXS12NVJU FVXS18NVJU FFQ09LVJU FFQ12LVJU FFQ15LVJU FFQ18LVJU Outdoor Unit 2MXS18NMVJU 3MXS24NMVJU 4MXS36NMVJU i Table of Contents
SiUS121502E 1. Safety Cautions.......................................................................................... vi 1.1 Warnings and Cautions Regarding Safety of Workers.................................vi 1.2 Warnings and Cautions Regarding Safety of Users................................... viii 2. Used Icons ................................................................................................. xi Part 1 List of Functions ................................................................
SiUS121502E 2.3 Freeze Prevention Control ......................................................................... 58 2.4 Hot Start Control (In Heating Operation Only)............................................ 59 3. Control Specification .................................................................................60 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 Function of Thermistor ............................................................................... 60 Mode Hierarchy ..
SiUS121502E 6. Troubleshooting for FFQ Series..............................................................127 6.1 6.2 6.3 6.4 6.5 6.6 6.7 Indoor Unit PCB Abnormality ................................................................... 127 Drain Level Control System Abnormality.................................................. 128 Fan Motor (AC Motor) or Related Abnormality......................................... 129 Drain System Abnormality.................................................................
SiUS121502E 8.15 Power Module Check ............................................................................... 176 Part 7 Trial Operation and Field Settings.................................... 177 1. Pump Down Operation............................................................................178 2. Wiring Error Check Function ...................................................................179 3. Trial Operation .....................................................................................
SiUS121502E Safety Cautions 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer. Caution Items Pictograms 1.1 The caution items are classified into Warning and Caution.
Safety Cautions SiUS121502E Warning Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug. Plugging or unplugging the power cable plug to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m (6.5 ft)). Insufficient safety measures may cause a fall accident.
SiUS121502E Safety Cautions Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Use the welder in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency. 1.2 Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with successive fire sources (e.g.
Safety Cautions SiUS121502E Warning When wiring between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable. If the cover is not mounted properly, the terminal connection section may cause an electrical shock, excessive heat generation or fire. Do not damage or modify the power cable. Damaged or modified power cable may cause an electrical shock or fire.
SiUS121502E Safety Cautions Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks. If the combustible gas leaks and remains around the unit, it may cause a fire. Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.
Used Icons SiUS121502E 2. Used Icons The following icons are used to attract the attention of the reader to specific information. Icon Type of Information Warning Description Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get an unexpected result or has to restart (part of) a procedure. Note A Note provides information that is not indispensable, but may nevertheless be valuable to the reader, such as tips and tricks.
SiUS121502E Part 1 List of Functions 1. Functions.....................................................................................................
Functions SiUS121502E Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience z z Operation limit for cooling (°CDB) — — Operation limit for cooling (°FDB) — — Operation limit for heating (°CWB) — — Operation limit for heating (°FWB) — — PAM control — — FTXS09/12/15/18/24LVJU Inverter (with inverter power control) CTXS07LVJU Basic Function Functions FTXS09/12/15/18/24LVJU Category CTXS07LVJU 1.
Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Inverter (with inverter power control) z z Operation limit for cooling (°CDB) — — Operation limit for cooling (°FDB) — — Operation limit for heating (°CWB) — — Operation limit for heating (°FWB) — — PAM control — — CDXS15/18/24LVJU Basic Function Functions FDXS09/12LVJU Category CDXS15/18/24LVJU Functions FDXS09/12LVJU SiUS121502E Air-purifying filter — — Category Health & Clean Functions Pho
Category Basic Function Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z Operation limit for cooling (°CDB) — Operation limit for cooling (°FDB) — Operation limit for heating (°CWB) — Operation limit for heating (°FWB) — PAM control — Category Health & Clean FVXS09/12/18NVJU SiUS121502E FVXS09/12/18NVJU Functions Functions Air-purifying filter — Photocatalytic deodorizing filter — Air-purifying fi
Category Basic Function Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with inverter power control) z Operation limit for cooling (°CDB) — Operation limit for cooling (°FDB) — Operation limit for heating (°CWB) — Category Health & Clean Functions FFQ09/12/15/18LVJU Functions FFQ09/12/15/18LVJU SiUS121502E Air-purifying filter — Photocatalytic deodorizing filter — Air-purifying filter with photocatalytic deodorizing function — O
2MXS18NMVJU 3MXS24NMVJU 4MXS36NMVJU Air-purifying filter — — Photocatalytic deodorizing filter — — 14 ~ 114.8 Air-purifying filter with photocatalytic deodorizing function — — –15 ~ 15.5 –15 ~ 15.5 Titanium apatite photocatalytic air-purifying filter — — 5~ 59.9 5~ 59.
SiUS121502E Part 2 Specifications 1. Indoor Unit...................................................................................................8 2. Outdoor Unit..............................................................................................
Indoor Unit SiUS121502E 1.
SiUS121502E Indoor Unit 60 Hz, 208 - 230 V FTXS15LVJU Model Cooling Rated Capacity Front Panel Color Airflow Rate Fan FTXS18LVJU Heating H M L SL Type Motor Output Speed Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Liquid Piping Gas Connections Drain Drawing
Indoor Unit SiUS121502E 60 Hz, 208 - 230 V FDXS09LVJU Model Rated Capacity External Static Pressure H M Airflow Rate L SL Type Fan Motor Output Speed Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H/M/L Level Sound Power Level Heat Insulation Liquid Piping Gas Connections Drain Drawing No. Cooling cfm (m³/min) W Steps A W % in. (mm) in.
SiUS121502E Indoor Unit 60 Hz, 208 - 230 V CDXS24LVJU Model Cooling Rated Capacity External Static Pressure H M Airflow Rate L SL Type Fan Motor Output Speed Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Heat Insulation Liquid Piping Gas Connections Drain Drawing No. inAq (Pa) 565 (16.0) 523 (14.8) 477 (13.5) 395 (11.
Indoor Unit SiUS121502E 60 Hz, 208 - 230 V FVXS18NVJU Model Cooling Heating Rated Capacity Front Panel Color Airflow Rate Fan 18 kBtu/h Class White H M L SL Type Motor Output Speed Air Direction Control Air Filter Running Current (Rated) Power Consumption (Rated) Power Factor (Rated) Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H / M / L / SL Level Sound Power Level Heat Insulation Liquid Piping Gas Connections Dra
SiUS121502E Indoor Unit 60 Hz, 208 - 230 V FFQ15LVJU Model Cooling Rated Capacity Decoration Panel Airflow Rate Fan FFQ18LVJU Model Color Dimensions (H × W × D) Weight (Mass) Lbs (kg) H cfm (m³/min) L Type Motor Output W Speed Steps Air Direction Control Running Current (Rated) Power Consumption (Rated) Power Factor Temperature Control Dimensions (H × W × D) Packaged Dimensions (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure H/L Level Heat Insulation Liquid Piping Gas Connections
Outdoor Unit SiUS121502E 2. Outdoor Unit 60 Hz, 208 - 230 V 2MXS18NMVJU Model W/W Btu/h·W COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Liquid Piping Gas Connections Drain Heat Insulation No.
SiUS121502E Outdoor Unit 60 Hz, 208 - 230 V 3MXS24NMVJU Model W/W Btu/h·W COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Liquid Piping Gas Connections Drain Heat Insulation No.
Outdoor Unit SiUS121502E 60 Hz, 208 - 230 V 4MXS36NMVJU Model W/W Btu/h·W COP EER SEER / HSPF Casing Color Compressor Refrigerant Oil Refrigerant Airflow Rate Fan Type Model Motor Output Model Charge Type Charge H M L H M L Type Motor Output Running Current Power Consumption Starting Current Dimension (H × W × D) Packaged Dimension (H × W × D) Weight (Mass) Gross Weight (Gross Mass) Sound Pressure Level Liquid Piping Gas Connections Drain Heat Insulation No.
SiUS121502E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.................................................................................................18 1.1 1.2 1.3 1.4 1.5 CTXS07LVJU, FTXS09/12LVJU ................................................................ 18 FTXS15/18/24LVJU ................................................................................... 20 FDXS09/12LVJU, CDXS15/18/24LVJU ..................................................... 22 FVXS09/12/18NVJU.......
Indoor Unit SiUS121502E 1. Indoor Unit 1.1 CTXS07LVJU, FTXS09/12LVJU Control PCB (PCB1) 1) 2) 3) 4) 5) 6) 7) 8) 9) S1 S21 S25 S32 S41 S46 S47 H1, H2, H3, FG JA Connector for DC fan motor Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB Indoor heat exchanger thermistor Connector for swing motors Connector for display PCB Connector for signal receiver PCB Connector for terminal board Address setting jumper ∗ Refer to page 189 for detail.
SiUS121502E Indoor Unit Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB S48 3P210728-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB Forced cooling operation ON/OFF button LED for operation (green) LED for timer (yellow) LED for INTELLIGENT EYE (green) Room temperature thermistor RTH1 SW1 LED3 S49 INTELLIGENT EYE Sensor PCB (PCB4) 1) S26 LED2 LED1 3P210728-1 Connector for control PCB S26 3EB86013-1 Note: T
Indoor Unit 1.2 SiUS121502E FTXS15/18/24LVJU Control PCB (PCB1) 1) 2) 3) 4) 5) 6) 7) 8) 9) S1 S21 S25 S32 S41 S46 S47 H1, H2, H3, FG JA Connector for DC fan motor Connector for centralized control (HA) Connector for INTELLIGENT EYE sensor PCB Indoor heat exchanger thermistor Connector for swing motors Connector for display PCB Connector for signal receiver PCB Connector for terminal board Address setting jumper ∗ Refer to page 189 for detail.
SiUS121502E Indoor Unit Signal Receiver PCB (PCB2) 1) S48 Connector for control PCB S48 3P224121-1 Display PCB (PCB3) 1) 2) 3) 4) 5) 6) S49 SW1 LED1 (H1P) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB Forced cooling operation ON/OFF button LED for operation (green) LED for timer (yellow) LED for INTELLIGENT EYE (green) Room temperature thermistor RTH1 SW1 LED3 S49 INTELLIGENT EYE Sensor PCB (PCB4) 1) S36 LED2 LED1 3P224121-1 Connector for control PCB S36 3P227885-1 Note: Th
Indoor Unit 1.3 SiUS121502E FDXS09/12LVJU, CDXS15/18/24LVJU Control PCB (A1P) 1) 2) 3) 4) 5) 6) 7) 8) S1 S7 S21 S26 S32 H1, H2, H3 FG (GND) JA 9) JB 10) JC 11) LED A 12) FU1 (F1U) 13) V1 (V1TR) Connector for AC fan motor Connector for AC fan motor (Hall IC) Connector for centralized control (HA) Connector for display PCB Connector for indoor heat exchanger thermistor Connector for terminal board Connector for terminal board (ground) Address setting jumper ∗ Refer to page 189 for detail.
SiUS121502E Indoor Unit Display PCB (A2P) 1) 2) 3) 4) 5) S1 SW1 (S1W) LED2 (H2P) LED3 (H3P) RTH1 (R1T) Connector for control PCB Forced cooling operation ON/OFF button LED for timer (yellow) LED for operation (green) Room temperature thermistor S1 LED3 LED2 RTH1 1 SW1 2P084375-1 LED 1 does not function. Note: The symbols in the parenthesis are the names on the appropriate wiring diagram.
Indoor Unit 1.4 SiUS121502E FVXS09/12/18NVJU Control PCB (PCB2) 1) S1 2) S21 3) S26 4) S32 5) S41 6) S42 7) S46 8) S48 9) H1, H2, H3 10)E1 11)JA Connector for fan motor Connector for centralized control (HA) Connector for service PCB Indoor heat exchanger thermistor Connector for lower air outlet motor Connector for swing motor Connector for display PCB Connector for sensor PCB Connector for terminal board Terminal for ground wire Address setting jumper ∗ Refer to page 189 for detail.
SiUS121502E Indoor Unit Sensor PCB (PCB1) 1) S49 2) RTH2 (R1T) Connector for control PCB Room temperature thermistor RTH2 S49 3P191450-1 Service PCB (PCB3) 1) S27 2) SW2 (S2W)-4 3) SW4 (S4W) Connector for control PCB Switch for upward airflow limit setting ∗ Refer to page 191 for detail. ∗ Keep the other switches as factory setting. Switch for airflow selection ∗ Refer to page 38 for detail.
Indoor Unit 1.
SiUS121502E Wired Remote Controller 2. Wired Remote Controller 2.
Wired Remote Controller 2.
SiUS121502E Wireless Remote Controller 3. Wireless Remote Controller 3.1 BRC7E830 Signal Receiver PCB 1) X1A 2) X2A 3) SS1 4) SS2 Connector for display PCB Connector for control PCB MAIN / SUB setting switch ∗ Refer to page 196 for detail. Address setting switch ∗ Refer to page 196 for detail.
Outdoor Unit SiUS121502E 4. Outdoor Unit Main PCB (PCB1) 1) S 2) S15 3) S20 (white) 4) S21 (red) 5) S22 (blue) 6) S23 (yellow) 7) S40 8) S70 9) S80 10) S90 11) S92 12) S93 13) S201, S202 14) HL1, HN1 15) E1, E2 16) U, V, W 17) FU1, FU2 18) FU3 19) V2, V3, V401 30 Connector for terminal board (indoor - outdoor transmission) Connector for COOL / HEAT mode lock ∗ Refer to page 186 for detail.
SiUS121502E Outdoor Unit E1, E2 HL1, HN1 V401 FU1 V3 V2 FU3 S S15 S23 S22 S21 S20 S201 U, V, W S80 FU2 S70 S40 S93 S90 S92 S202 2P350358-10 2P350358-11 Printed Circuit Board Connector Wiring Diagram 31
Outdoor Unit Service Monitor PCB (PCB2) SiUS121502E 1) 2) 3) 4) S501, S502 LED A LED1 - LED5 SW1 5) SW2 6) SW3 7) SW4 8) SW6-1 Connector for main PCB LED for service monitor (green) LED for service monitor (red) Forced cooling operation ON/OFF switch ∗ Refer to page 178 for detail. Operation mode switch ∗ Refer to page 178 for detail. Wiring error check switch ∗ Refer to page 179 for detail. Priority room setting switch ∗ Refer to page 185 for detail.
SiUS121502E Part 4 Function and Control 1. Function of CTXS, FTXS, CDXS, FDXS, FVXS Series ............................34 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 Temperature Control .................................................................................. 34 Frequency Principle.................................................................................... 34 Airflow Direction Control (CTXS, FTXS, FVXS Series) ..............................
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E 1. Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
SiUS121502E Inverter Principle Function of CTXS, FTXS, CDXS, FDXS, FVXS Series To regulate the capacity, a frequency control is needed. The inverter makes it possible to control the rotation speed of the compressor. The following table explains the inverter principle: Phase 1 2 Description The supplied AC power source is converted into the DC power source for the present. The DC power source is reconverted into the three phase AC power source with variable frequency.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series Frequency Limits The following functions regulate the minimum and maximum frequency: Frequency Functions Four way valve operation compensation. Refer to page 65. Low High Forced Cooling Operation 1.3 SiUS121502E Compressor protection function. Refer to page 66. Discharge pipe temperature control. Refer to page 66. Input current control. Refer to page 67. Freeze-up protection control. Refer to page 68. Heating peak-cut control.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series FVXS Series Flap (up and down) 40 25˚ ˚ 90 ˚ 90 Upward airflow limit OFF Heating ˚ Cooling / Dry 20˚ ˚ 90 ˚ 90 Upward airflow limit ON (R6829) 20˚ (R6831) (R6832) 3-D Airflow (R6830) CTXS, FTXS Series Alternative repetition of vertical and horizontal swing motions enables uniform air-conditioning of the entire room. When the horizontal swing and vertical swing are both set to automatic operation, the airflow becomes 3-D airflow.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series Airflow Selection Setting SiUS121502E FVXS Series Airflow direction can be set with the airflow selection switch. Open the front panel. Front panel Air is blown from the upper outlet only. The blow pattern is automatically decided depending on mode and conditions. (Recommended and factory set.) (R17866) Caution: Before opening the front panel, be sure to stop the operation and turn the breaker off.
SiUS121502E 1.4 Function of CTXS, FTXS, CDXS, FDXS, FVXS Series Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. Automatic Fan Speed Control In automatic fan speed control, the step SL is not available.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.5 SiUS121502E Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate.
SiUS121502E 1.6 Function of CTXS, FTXS, CDXS, FDXS, FVXS Series Automatic Operation Outline Detail Automatic Cooling / Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.7 SiUS121502E Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Detail Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A. The system resumes from defrost control in any zones except A. The operation turns on in any zones except A.
SiUS121502E 1.8 Function of CTXS, FTXS, CDXS, FDXS, FVXS Series NIGHT SET Mode Outline When the OFF TIMER is set, NIGHT SET Mode is automatically activated. NIGHT SET Mode keeps the airflow rate setting. Detail NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in cooling, or lowers it slightly in heating.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E 1.10 INTELLIGENT EYE Operation (CTXS, FTXS Series) Outline This function detects the existence of humans in the room with a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity. Detail 1. Detection method by INTELLIGENT EYE If the sensor detects the outputs 10 times/sec. or more, it judges humans are in the room. sampling (20 msec.) Sensor output 1 sec.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.11 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E 1.12 Clock Setting ARC452 Series ARC466 Series The clock can be set by taking the following steps: 1. Press the CLOCK button. → is displayed and MON and blink. 2. Press the SELECT or SELECT button to set the clock to the current day of the week. 3. Press the CLOCK button. → blinks. 4. Press the SELECT or SELECT button to adjust the clock to the present time.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.13 WEEKLY TIMER Operation (CTXS, FTXS, FVXS series) Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Detail The illustrations are for FVXS series as representative. Setting example of the WEEKLY TIMER The same timer settings are used from Monday through Friday, while different timer settings are used for the weekend.
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 ON OFF ON 8:30 17:30 [Monday] program 3 77˚F (25˚C) 6:00 program 4 OFF 81˚F (27˚C) 22:00 Setting Displays Day and number 1. Press ON/OFF Time Temperature . • The day of the week and the reservation number of the current day will be displayed.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 6. Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10-minute intervals. • To return to the ON/OFF TIMER mode setting, press . • Proceed to STEP 9 when setting the OFF TIMER. 7. Press . • The time will be set. •“ ” and the temperature blink. 8. Press to select the desired temperature. • The temperature can be set between 50˚F (10˚C) and 90˚F (32˚C).
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation 1. Press . • The day of the week and the reservation number of the current day will be displayed. 2. Press to select the day of the week and the reservation number to be confirmed. • Pressing displays the reservation details. • To change the confirmed reserved settings, select the reservation number and press .
Function of CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E To delete reservations An individual reservation 1. Press . • The day of the week and the reservation number will be displayed. 2. Press to select the day of the week and the reservation number to be deleted. 3. Press •“ . ” and “ 4. Press • Pressing ” or “ ” blink. until no icon is displayed. changes the ON/OFF TIMER mode in sequence. • Selecting “blank” will cancel any reservation you may have. blank ON TIMER OFF TIMER 5. Press 6.
SiUS121502E Function of CTXS, FTXS, CDXS, FDXS, FVXS Series 1.14 Other Functions 1.14.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation starts, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating. Note: The cold air blast is prevented using similar control when defrost control starts or when the thermostat is turned ON. 1.14.
Function of FFQ Series SiUS121502E 2. Function of FFQ Series 2.1 Drain Pump Control 2.1.1 Normal Operation ON Float switch OFF Thermostat ON (running) OFF Error display ON OFF Drain pump ON OFF 5 min. (R21088) The float switch is OFF in normal operation. When cooling operation starts (thermostat ON), the drain pump turns ON simultaneously. After the thermostat turns OFF, the drain pump continues to operate for another 5 minutes.
SiUS121502E Function of FFQ Series 2.1.3 If the Float Switch is ON with the Thermostat OFF in Cooling Operation ON Float switch OFF Thermostat ON (running) OFF Error display A3 ON OFF Drain pump ON OFF 5 min. 5 sec. (R21090) When the float switch turns ON, the drain pump turns ON simultaneously. If the float switch remains ON even after the residual operation of the drain pump has ended, the error code A3 is displayed on the remote controller.
Function of FFQ Series 2.2 SiUS121502E Thermostat Sensor in Remote Controller Outline Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor in remote controller is set to Use.
SiUS121502E Function of FFQ Series Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the indoor unit may therefore be turned off by the thermostat before the lower part of the room reaches the set temperature.
Function of FFQ Series 2.3 SiUS121502E Freeze Prevention Control Outline When the temperature detected by liquid pipe thermistor (R2T) of the indoor heat exchanger drops too low, the unit enters freeze prevention control in accordance with the following conditions, and is also set in accordance with the conditions given below. Detail Conditions for starting: Liquid pipe temperature ≤ – 1°C (30.
SiUS121502E 2.4 Function of FFQ Series Hot Start Control (In Heating Operation Only) Outline At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. Detail Defrost ending or oil return ending or Thermostat ON Hot start ending conditions · lapse of 3 minutes OR · TH2 > 34˚C (93.2˚F) · Tc > 52˚C (125.
Control Specification SiUS121502E 3. Control Specification 3.1 Function of Thermistor Electronic expansion valve (5) EVA EVB EVC EVD D C B A (1) Four way valve (2) (4) Compressor (3) (R17360) The illustration is for the 4-room models as representative and have 4 lines of indoor unit system (A ~ D). The 3-room models have 3 lines (A ~ C) and 2-room models have 2 lines (A ~ B). (1) Outdoor Heat Exchanger Thermistor 1.
SiUS121502E Control Specification (4) Indoor Heat Exchanger Thermistor 1. The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature. The system sets the target discharge pipe temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge pipe temperature can be obtained. 2.
Control Specification 3.2 SiUS121502E Mode Hierarchy Outline Air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing.
SiUS121502E 3.3 Control Specification Frequency Control Outline Frequency that corresponds to each room’s capacity is determined according to the difference between the target temperature and the temperature of each room. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
Control Specification Parameters SiUS121502E Indoor unit output determined from indoor unit volume, airflow rate and other factors. An S value is the capacity of the indoor unit, and is used for frequency command.
SiUS121502E 3.4 Control Specification Controls at Mode Changing / Start-up 3.4.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature and the preheating command from the indoor unit. Detail ON Condition When the outdoor temperature is below 20°C (68°F), the inverter operation in open phase starts. OFF Condition When the outdoor temperature is higher than 22°C (71.6°F), the inverter operation in open phase stops. 3.4.
Control Specification SiUS121502E 3.4.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not used when defrosting.) (Hz) Frequency C B A D E (sec.) Time F (R13528) 3.
SiUS121502E 3.6 Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.
Control Specification 3.7 SiUS121502E Freeze-up Protection Control Outline During cooling operation, the signals sent from the indoor units control the operating frequency limitation and prevent freezing of the indoor heat exchanger. (The signals from the indoor units are divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature 2 seconds after operation starts and 30 seconds after the number of operation room is changed.
SiUS121502E 3.9 Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF while defrosting. 3. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 4.
Control Specification SiUS121502E 3.11 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature. The system is in heating operation. The compressor operates for 6 minutes.
SiUS121502E Control Specification 18 class 24/36 class 33 4 ~ 12 26 4 ~ 12 39.2 ~ 53.6 58 39.2 ~ 53.6 58 E (Hz) F (seconds) 74 60 42 90 G (seconds) H (seconds) 120 650 60 590 J (seconds) K (pulse) 80 320 40 400 A (minutes) B (°C) C (°F) D (Hz) L (pulse) 300 250 M (pulse) N (pulse) 300 320 300 400 P (pulse) Q (pulse) 160 160 50 0 : The same value continues. 3.
Control Specification SiUS121502E 3.13 Electronic Expansion Valve Control Outline 72 The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1. Gas pipe isothermal control 2. SC (subcooling) control 3. Liquid pipe temperature control (with all ports connected and all rooms being air-conditioned) 4.
SiUS121502E Control Specification SC (subcooling) control Control when the frequency changes Control for abnormally high discharge pipe temperature Oil recovery control Indoor freeze-up protection control Liquid pipe temperature control Liquid pipe temperature control for non-operating units Dew prevention control for indoor rotor The followings are the examples of electronic expansion valve control which function in each operation mode.
Control Specification SiUS121502E 3.13.1 Fully Closing with Power on The electronic expansion valve is initialized when the power is turned on. The opening position is set and the pressure equalization is developed. 3.13.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization. 3.13.
SiUS121502E Control Specification 3.13.8 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.
Control Specification SiUS121502E 3.13.10 SC (Subcooling) Control Outline The liquid pipe temperature and the heat exchanger temperature are detected and the electronic expansion valve opening is compensated so that the SC of each room becomes the target SC. When the actual SC is > target SC, open the electronic expansion valve of the room. When the actual SC is < target SC, close the electronic expansion valve of the room.
SiUS121502E Control Specification 3.14 Malfunctions 3.14.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Gas pipe thermistor 5. Outdoor temperature thermistor 6. Liquid pipe thermistor Relating to CT Malfunction Refer to CT or related abnormality on page 158 for detail. 3.14.
SiUS121502E Part 5 Remote Controller 1. 2. 3. 4. CTXS, FTXS Series ..................................................................................79 CDXS, FDXS Series .................................................................................81 FVXS Series..............................................................................................83 FFQ Series................................................................................................85 4.1 Wired Remote Controller..
SiUS121502E CTXS, FTXS Series 1. CTXS, FTXS Series Signal transmitter Receiver Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
CTXS, FTXS Series SiUS121502E Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO4 button • ECONO operation. QUIET button SWING5 button • OUTDOOR UNIT QUIET operation. • Adjusts the airflow direction. • When you press the SWING button, the flap moves up and down, or (and) the louver moves right and left. The flap (louver) stops when you press the SWING button again. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation.
SiUS121502E CDXS, FDXS Series 2. CDXS, FDXS Series Signal transmitter Display (LCD) Receiver • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. • Do not drop the remote controller. Do not get it wet.
CDXS, FDXS Series SiUS121502E Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO2 button • ECONO operation. QUIET button • OUTDOOR UNIT QUIET operation. SELECT button • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation. • OUTDOOR UNIT QUIET operation and POWERFUL operation cannot be used at the same time. Priority is given to the function you pressed last. • Changes the ON/OFF TIMER settings.
SiUS121502E FVXS Series 3. FVXS Series Signal transmitter Display (LCD) • Displays the current settings. (In this illustration, each section is shown with all its displays on for the purpose of explanation.) Receiver TEMPERATURE adjustment buttons • To use the remote controller, aim the transmitter at the indoor unit. If there is anything blocking the signals between the unit and the remote controller, such as a curtain, the unit may not operate.
FVXS Series SiUS121502E Open the Front Cover MODE button • Selects the operation mode. AUTO DRY COOL HEAT FAN ECONO2 button • Starts ECONO operation. QUIET button SWING3 button • OUTDOOR UNIT QUIET operation. • Adjusts the airflow direction. • When you press the SWING button, the flap moves up and down. The flap stops when you press the SWING button again. • OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation.
SiUS121502E FFQ Series 4. FFQ Series 4.1 Wired Remote Controller 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
FFQ Series SiUS121502E 1. Operation mode selector button Press this button to select the operation mode of your preference. * Available modes vary with the indoor unit model. 2. Fan speed control button Press this button to select the fan speed of your preference. * Available fan speeds vary with the indoor unit model. 3. Menu/OK button Used to indicate the main menu. Used to enter the selected item. 7. Left button Used to highlight the next items on the left-hand side.
SiUS121502E FFQ Series Liquid Crystal Display Two types of liquid crystal display (LCD) are available. The standard display is set by default. Detailed display can be selected in the main menu. The displayed contents of the screen vary with the operation mode of the indoor unit model. (The following display will appear when the indoor unit is in automatic operation.) Standard display 10. Changeover controlled by the master indoor unit 9. Under centralized control 11. Setback 8. ( ) display 7. ( 1.
FFQ Series SiUS121502E “Error: Push Menu button” “Warning: Push Menu button” Displayed if an error or warning is detected. 1. Operation mode Used to display the current operation mode: Cool, Heat, Vent, Fan, Dry or Auto. “Time to clean filter” “Time to clean element” “Time to clean filter & element” Displayed as a reminder when it is time to clean the filter or element. 2. Fan Speed Used to display the fan speed that is set for the indoor unit.
SiUS121502E FFQ Series 11. Setback “ ” The setback icon flashes when the unit is turned on under the setback control. 12. Air Flow Direction “ ” Displayed when the air flow direction and swing are set. If the connected indoor unit model does not include oscillating louvers this item will not be displayed. 13. Current Day/Time (12/24 hour time display) Displayed if the clock is set. If the clock is not set, “ -- : -- ” will be displayed. 12 hour time format is displayed by default.
FFQ Series 4.2 SiUS121502E Wired Remote Controller 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2.
SiUS121502E FFQ Series 1. Operation mode selector button • Press this button to select the operation mode of your preference. * Available modes vary with the indoor unit model. 2. Fan speed control button • Press this button to select the fan speed of your preference. * Available fan speeds vary with the indoor unit model. 3. Menu/OK button • Used to enter the main menu. • Used to enter the selected item. 4. Up button • Used to raise the setpoint.
FFQ Series SiUS121502E Liquid Crystal Display • Three types of display mode (Standard, Detailed and Simple) are available. • Standard display is set by default. • Detailed and Simple displays can be selected in the main menu. Standard display 10.Changeover controlled by the master indoor unit 9.Under centralized control 11.Setback 8.( ) Scheduled 7.( 1.Operation mode ) Key Lock 3.Setpoint 2.Fan Speed 6.Ventilation 4.Stand by for Defrost/ Hot start 5.
SiUS121502E FFQ Series Simple display 1.Operation mode 14.Selectable Display Item 3.Setpoint 11.Setback 2.Fan speed 4.Stand by for Defrost/ Hot start Note for all display modes • Depending on the field settings, while the indoor unit is stopped, OFF may be displayed instead of the operation mode and/or the setpoint may not be displayed.
FFQ Series SiUS121502E “Error: Push Menu button” “Warning: Push Menu button” • Displayed if an error or warning is detected. 1. Operation mode • Used to display the current operation mode: Cool, Heat, Vent, Fan, Dry or Auto. • In Auto mode, the actual operation mode (Cool or Heat) will be also displayed. • Operation mode cannot be changed when OFF is displayed. Operation mode can be changed after starting operation.
SiUS121502E FFQ Series 11. Setback “ ” • The setback icon flashes when the unit is turned on by the setback control. 12. Airflow Direction “ ” • Displayed when the airflow direction and swing are set. • If the connected indoor unit model does not include oscillating louvers this item will not be displayed. 13. Current Day/Time (12/24 hour time display) • Displayed if the clock is set. • If the clock is not set, “ -- : -- ” will be displayed. • 12 hour time format is displayed by default.
FFQ Series 4.3 SiUS121502E Wireless Remote Controller 1 8 3 11 10 6 13 4 9 12 2 15 21 20 22 23 14 5 19 18 16 7 17 (R18863) (R17873) DISPLAY 1 2 (SIGNAL TRANSMISSION) This lights up when a signal is being transmitted. DISPLAY , , (OPERATION MODE) , , This display shows the current operation mode. 3 DISPLAY (SET TEMPERATURE) This display shows the set temperature. 4 DISPLAY (PROGRAMMED TIME) This display shows programmed time of the system start or stop.
SiUS121502E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .........................................99 2. Troubleshooting with LED .......................................................................100 2.1 Indoor Unit................................................................................................ 100 2.2 Outdoor Unit ............................................................................................. 101 3. Service Diagnosis ..............................
SiUS121502E 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.20 Input Overcurrent Detection ..................................................................... 149 Four Way Valve Abnormality.................................................................... 150 Discharge Pipe Temperature Control....................................................... 152 High Pressure Control in Cooling ............................................................. 153 Compressor Sensor System Abnormality ............
SiUS121502E General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Problem Symptom Check Item None of the units operates. Check the power supply. Check the types of the indoor units. Check the outdoor temperature. Operation sometimes stops. Diagnose with remote controller indication Check the remote controller addresses. Check the power supply. Check the outdoor temperature. Diagnose with remote controller indication. Some indoor units do not operate.
Troubleshooting with LED SiUS121502E 2. Troubleshooting with LED 2.1 Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions. 2. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages.
SiUS121502E Caution: Troubleshooting with LED When operation stops suddenly and the operation lamp blinks, it could be operation mode conflict. 1) Check if the operation modes all the same for the indoor units connected to multi system outdoor unit? 2) If not, set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking.
Service Diagnosis SiUS121502E 3. Service Diagnosis 3.1 CTXS, FTXS, CDXS, FDXS, FVXS Series 3.1.1 ARC452 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. Method 1 Timer cancel button < ARC452 Series > (R14460) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. Note: 102 No. 1 Code 00 No. 13 Code C7 No.
SiUS121502E Method 2 Service Diagnosis 1. Press the 3 buttons (TEMP , TEMP , MODE) at the same time to enter the diagnosis mode. (R14550) The left-side number blinks. (R9430) 2. Press the TEMP or TEMP button and change the number until you hear the two consecutive beeps or the long beep. (R14551) 3. Diagnose by the sound. beep : The left-side number does not correspond with the error code.
Service Diagnosis SiUS121502E 5. Press the TEMP or TEMP button and change the number until you hear the long beep. (R14547) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side number corresponds with the error code. 7. Determine the error code.
SiUS121502E Service Diagnosis 3.1.2 ARC466 Series Remote Controller 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen. Method 1 Timer cancel button (R21282) < ARC466 Series > 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. Note: Service Diagnosis No. Code No. Code No.
Service Diagnosis SiUS121502E Method 2 1. Press the center of the Temp button and the Mode button at the same time. (R11669) 5C is displayed on the LCD. (R11821) 2. Select 5C (service check) with the Temp or Temp button. 3. Press the Mode button to enter the service check mode. (R11672) The left-side number blinks. (R11670) 4. Press the Temp or Temp button and change the number until you hear the two consecutive beeps or the long beep.
SiUS121502E Service Diagnosis 5. Diagnose by the sound. beep: The left-side number does not correspond with the error code. two consecutive beeps: The left-side number corresponds with the error code but the rightside number does not. long beep: Both the left-side and right-side numbers correspond with the error code. The numbers indicated when you hear the long beep are the error code. Refer to page 114, 115. 6. Press the Mode button. (R11672) The right-side number blinks. (R11673) 7.
Service Diagnosis 3.2 SiUS121502E FFQ Series 3.2.1 BRC1E71/72/73 Note: The illustrations are for BRC1E72 as representative. Relations Between Modes Main Menu screen • Operation mode changeover • Fan speed control • Menu display • Confirmation of each setting • On • Off • Cancel • Operation lamp Press the Menu/OK button once. Press the Cancel button for 4 seconds or more.
SiUS121502E Service Check Function Service Diagnosis The following message is displayed on the screen when a error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp Menu/OK button (R18817) (1) Check if it is error or warning. Operation status Abnormal shutdown The system stops operating. Display The operation lamp (green) starts to blink.
Service Diagnosis SiUS121502E 3.2.2 BRC7E830 Relations Between Modes The following modes can be selected by using the INSPECTION/TEST button on the remote controller. Press the INSPECTION/TEST Indoor unit settings can be made. button for more than 4 seconds. z Filter cleaning sign time Field z Others Service setting mode mode Service data can be obtained. z Error code history z Temperature data of various sections Service settings can be made.
SiUS121502E Service Diagnosis Step 2 Action Press the UP or DOWN button and change the UNIT No. until the receiver of the remote controller starts to beep. UP button DOWN button (R15408) 3 If you hear... Then... 3 short beeps 1 short beep Follow all steps below. Follow steps 3 and 4. Continue the operation in step 4 until you hear a continuous beep. This continuous beep indicates that the error code is confirmed. 1 continuous beep There is no abnormality. Press the MODE button.
Service Diagnosis SiUS121502E Step 4 Action Press the UP or DOWN button to change the error code upper digit until the receiver of the remote controller starts to beep. DOWN 4 5 6 7 8 9 U P L J F H E C A 0 UP button DOWN button UP (R15411) 5 If you hear... 2 short beeps Then... The upper digit matches. 1 short beep 1 continuous beep No digits match. Both upper and lower digits match. Press the MODE button. The right 0 (lower digit) indication of the error code blinks.
SiUS121502E Service Diagnosis Step 6 Action Press the UP or DOWN button and change the error code lower digit until the receiver of the remote controller generates a continuous beep. DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 UP button DOWN button UP (R15413) 7 Press the MODE button to return to the normal mode. If you do not press any button for 1 minutes, the remote controller automatically returns to the normal mode.
Code Indication on Remote Controller SiUS121502E 4. Code Indication on Remote Controller 4.1 CTXS, FTXS, CDXS, FDXS, FVXS Series Error Codes 4.
SiUS121502E 4.3 Code Indication on Remote Controller Outdoor Unit i: ON, h: OFF, j: Blinks Green A j j j j j j j j j j j j j j j j j i h Outdoor Unit LED Indication Red 1 2 3 4 h 5 i h h h h i i i h h h h — — — — — — See the note 4. — — — — — — — Check the power supply.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E 5. Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series 5.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit. Error Decision Conditions The system cannot set the internal settings.
SiUS121502E Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the combination of the indoor and outdoor unit. OK? NO Match the compatible models. YES ∗ To secure the connection, once disconnect the connector and then reconnect it. Check the connection of connectors (See Note.). OK? YES Check the power supply voltage.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series 5.2 SiUS121502E Freeze-up Protection Control / Heating Peak-cut Control Error Code A5 Method of Error Detection Freeze-up protection control Error Decision Conditions Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
SiUS121502E 5.3 Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series Fan Motor or Related Abnormality 5.3.1 DC Motor (CTXS, FTXS, FVXS Series) Error Code A6 Method of Error Detection The rotation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation. Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Caution Check No.02 Refer to P.167 SiUS121502E Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Turn off the power and rotate the fan by hand. Does the fan rotate smoothly? NO Replace the indoor fan motor.
SiUS121502E Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series 5.3.2 AC Motor (CDXS, FDXS Series) Error code A6 Method of Error Detection The rotation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation. Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap. Supposed Causes Service Diagnosis Power supply voltage is not as specified.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E Troubleshooting Caution Check No.04 Refer to P.167 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Start operation. YES Does the fan rotate? Check No. 04 Check Hall IC NO Turn off the power and rotate the fan by hand.
SiUS121502E 5.4 Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series Thermistor or Related Abnormality Error Code C4, C9 Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less during compressor operation. Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series 5.5 SiUS121502E Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code U4 Method of Error Detection The data received from the outdoor unit in signal transmission is checked whether it is normal. Error Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
SiUS121502E Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series Troubleshooting Caution Check No.11 Refer to P.168 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the indoor unit - outdoor unit connection wires. Is there any wiring error? YES Correct the indoor unit outdoor unit connection wires.
Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series 5.6 SiUS121502E Unspecified Voltage (Between Indoor Unit and Outdoor Unit) Error Code UA Method of Error Detection The supply power is detected for its requirements (pair type is different from multi type) by the indoor / outdoor transmission signal. Error Decision Conditions The pair type and multi type are interconnected.
SiUS121502E Troubleshooting for FFQ Series 6. Troubleshooting for FFQ Series 6.1 Indoor Unit PCB Abnormality Error Code A1 Method of Error Detection The system checks the data from EEPROM. Error Decision Conditions The data from the EEPROM is not received correctly. EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.
Troubleshooting for FFQ Series 6.2 SiUS121502E Drain Level Control System Abnormality A3 Error Code Method of Error Detection The float switch detects error. Error Decision Conditions The water level reaches its upper limit and the float switch turns OFF.
SiUS121502E 6.3 Troubleshooting for FFQ Series Fan Motor (AC Motor) or Related Abnormality A6 Error Code Method of Error Detection The signal from the fan motor detects abnormal fan speed. Error Decision Conditions The fan rotations are not detected while the output voltage to the fan is at its maximum.
Troubleshooting for FFQ Series 6.4 SiUS121502E Drain System Abnormality Error Code AF Method of Error Detection Water leakage is detected based on the float switch ON/OFF changeover while the compressor is not operating. Error Decision Conditions The float switch changes from ON to OFF while the compressor is OFF.
SiUS121502E 6.5 Troubleshooting for FFQ Series Thermistor or Related Abnormality Error Code C4, C5, C9 Method of Error Detection The temperatures detected by the thermistors determine thermistor errors. Error Decision Conditions The voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less during compressor operation. Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective.
Troubleshooting for FFQ Series 6.6 SiUS121502E Remote Controller Thermistor Abnormality CJ Error Code Method of Error Detection Even if remote controller thermistor is faulty, system is possible to operate by system thermistor. Malfunction detection is carried out by the temperature detected by the remote controller thermistor. Error Decision Conditions The remote controller thermistor is disconnected or shorted while the unit is running.
SiUS121502E 6.7 Troubleshooting for FFQ Series Signal Transmission Error (Between Indoor Unit and Remote Controller) Error Code U5 Method of Error Detection In case of controlling with 2 remote controllers, check the system using microcomputer if signal transmission between indoor unit and remote controller (main and sub) is normal. Error Decision Conditions Normal transmission does not continue for specified period.
Troubleshooting for FFQ Series 6.8 SiUS121502E Signal Transmission Error (Between MAIN Remote Controller and SUB Remote Controller) Error Code U8 Method of Error Detection In case of controlling with 2 remote controllers, check the system using microcomputer if signal transmission between MAIN remote controller and SUB remote controller is normal. Error Decision Conditions Normal transmission does not continue for specified period.
SiUS121502E 6.9 Troubleshooting for FFQ Series Field Setting Abnormality Error Code UA Error Decision Conditions Incorrect field setting Supposed Causes Defective indoor unit PCB Defective outdoor unit PCB Improper power supply Indoor-outdoor, indoor-indoor unit transmission wiring Defective remote controller wiring Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Troubleshooting for Outdoor Unit SiUS121502E 7. Troubleshooting for Outdoor Unit 7.1 Refrigerant Shortage Error Code U0 Outdoor Unit LED Display Aj 1h 2h 3i 4i 5h Method of Error Detection Refrigerant shortage is detected by checking the input current value and the compressor output frequency. If the refrigerant is short, the input current is smaller than the normal value. Error Decision Conditions The following conditions continue for 7 minutes.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.166 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Any thermistor disconnected? NO Check No.12 Refer to P.169 Stop valve closed? YES ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗ Room temperature thermistor ∗ Outdoor temperature thermistor YES Replace the thermistor(s) in position. Open the stop valve.
Troubleshooting for Outdoor Unit 7.2 SiUS121502E Low-voltage Detection or Over-voltage Detection Error Code Outdoor Unit LED Display U2 Aj 1i 2h 3h 4i 5h Method of Error Detection Indoor Unit The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation within ±10% from the rated value? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect the harness.
Troubleshooting for Outdoor Unit 7.3 SiUS121502E Wiring Error Check Unexecuted Error Code U3 Outdoor Unit LED Display Aj 1h 2i 3h 4h 5h Method of Error Detection The system checks if wiring error check is executed after clearing the memory. Error Decision Conditions An error is determined when the unit is operated by the remote controller without executing wiring error check after the memory was cleared.
SiUS121502E 7.4 Troubleshooting for Outdoor Unit Unspecified Voltage (Between Indoor Unit and Outdoor Unit) / Anti-icing Control in Other Rooms UA, UH Error Code Outdoor Unit LED Display Aj 1h 2h 3h 4h 5h Method of Error Detection A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.
Troubleshooting for Outdoor Unit 7.5 SiUS121502E Anti-icing Control for Indoor Unit Error Code A5 Outdoor Unit LED Display Aj 1i 2h 3i 4i 5h Method of Error Detection During cooling operation, indoor unit icing is detected by checking the temperatures sensed by the indoor heat exchanger thermistor and room temperature thermistor that are located in a shut-down room. Error Decision Conditions In cooling operation, the both conditions (A) and (B) are met for 5 minutes.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.166 Check No.12 Refer to P.169 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the wiring and piping. Wrong wiring or piping? YES Activate the wiring error check function. NO Check No. 12 Check the electronic expansion valve. Functioning? NO Replace the electronic expansion valve or coil. YES Check No.
Troubleshooting for Outdoor Unit 7.6 SiUS121502E Outdoor Unit PCB Abnormality Error Code E1 Outdoor Unit LED Display Aj 1i 2i 3i 4h 5h Method of Error Detection Detect within the program of the microcomputer. Error Decision Conditions The program of the microcomputer is in abnormal running order.
SiUS121502E 7.7 Troubleshooting for Outdoor Unit OL Activation (Compressor Overload) Error Code E5 Outdoor Unit LED Display Aj 1i 2h 3i 4h 5h Method of Error Detection A compressor overload is detected through compressor OL. Error Decision Conditions If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit SiUS121502E Troubleshooting Check No.01 Refer to P.166 Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Discharge pipe thermistor disconnected? Check No.12 Refer to P.169 Check No.14 Refer to P.170 Insert the thermistor in position. NO Check No. 01 Check the thermistors. Check No.13 Refer to P.170 YES NG ∗ Discharge pipe thermistor Replace the discharge pipe thermistor.
SiUS121502E 7.8 Troubleshooting for Outdoor Unit Compressor Lock Error Code E6 Outdoor Unit LED Display Aj 1h 2i 3i 4h 5h Method of Error Detection A compressor lock is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions Judging from the current waveform generated when high-frequency voltage is applied to the compressor. If the error repeats, the system is shut down.
Troubleshooting for Outdoor Unit 7.9 SiUS121502E DC Fan Lock Error Code E7 Outdoor Unit LED Display Aj 1i 2i 3i 4i 5h Method of Error Detection An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Error Decision Conditions The fan does not start in 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.
SiUS121502E Troubleshooting for Outdoor Unit 7.10 Input Overcurrent Detection Error Code E8 Outdoor Unit LED Display Aj 1h 2i 3h 4i 5h Method of Error Detection Detected by checking the input current value Error Decision Conditions The input current is at a certain value (depending on the condition) for 2.5 seconds. The compressor halts if the error occurs, and restarts automatically after 3-minute standby. Supposed Causes Outdoor temperature is out of operation range.
Troubleshooting for Outdoor Unit SiUS121502E 7.11 Four Way Valve Abnormality Error Code EA Outdoor Unit LED Display Aj 1i 2h 3h 4h 5h Method of Error Detection The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode. Error Decision Conditions A following condition continues for A seconds after the compressor has started.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.01 Refer to P.166 Check No.13 Refer to P.170 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Four way valve coil disconnected (loose)? Correct the four way valve coil. NO Harness disconnected? Check No.14 Refer to P.170 YES YES Reconnect the harness. NO Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
Troubleshooting for Outdoor Unit SiUS121502E 7.12 Discharge Pipe Temperature Control Error Code F3 Outdoor Unit LED Display Aj 1i 2h 3i 4h 5h Method of Error Detection An error is determined with the temperature detected by the discharge pipe thermistor. Error Decision Conditions If the temperature detected by the discharge pipe thermistor rises above A, the compressor stops. The error is cleared when the discharge pipe temperature is dropped below B.
SiUS121502E Troubleshooting for Outdoor Unit 7.13 High Pressure Control in Cooling Error Code F6 Outdoor Unit LED Display Aj 1i 2h 3i 4i 5h Method of Error Detection High pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C (149°F).
Troubleshooting for Outdoor Unit SiUS121502E 7.14 Compressor Sensor System Abnormality Error Code H0 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection The system checks the power supply voltage and the DC voltage before the compressor starts. The system checks the DC current of the compressor right after the compressor starts.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the connection of the reactor. Connection OK? NO Connect the reactor properly. YES Check the connection of the compressor. Connection OK? NO Connect the compressor properly. YES Check the reactor.
Troubleshooting for Outdoor Unit SiUS121502E 7.15 Position Sensor Abnormality Error Code H6 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Error Decision Conditions If the error repeats, the system is shut down.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.171 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Check No.18 Refer to P.173 Voltage as rated? Check No.20 Refer to P.174 NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check No. 20 Check the short circuit of the diode bridge.
Troubleshooting for Outdoor Unit SiUS121502E 7.16 CT or Related Abnormality Error Code H8 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection A CT or related error is detected by checking the compressor running frequency and CT-detected input current. Error Decision Conditions The compressor running frequency is more than A Hz and input current is less than B A. 18/24 class 36 class A (Hz) B (A) 32 55 0.5 0.5 If the error repeats, the system is shut down.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.171 Check No.21 Refer to P.175 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Then, turn on the power to restart the system. Start operation. ∗ Running current as shown at right with relay cable 1 or 2? YES Current (guideline) Replace the outdoor unit PCB (main PCB).
Troubleshooting for Outdoor Unit SiUS121502E 7.17 Thermistor or Related Abnormality (Outdoor Unit) Error Code H9, J3, J6, J8, J9, P4 Outdoor Unit LED Display Aj 1i 2i 3h 4h 5h Method of Error Detection This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Error Decision Conditions The voltage between the both ends of the thermistor is above 4.96 V or below 0.04 V with the power on.
SiUS121502E Troubleshooting Check No.01 Refer to P.166 Troubleshooting for Outdoor Unit In case of H9, J3, J6, J8, J9 Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? NO Reconnect the connectors or thermistors. YES Check No. 01 Check the thermistor resistance value. Normal? J3 error: The discharge pipe temperature is lower than the heat exchanger temperature.
Troubleshooting for Outdoor Unit SiUS121502E 7.18 Electrical Box Temperature Rise Error Code L3 Outdoor Unit LED Display Aj 1i 2i 3h 4i 5h Method of Error Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Error Decision Conditions With the compressor off, the radiation fin temperature is above A. The error is cleared when the temperature drops below B.
SiUS121502E Troubleshooting for Outdoor Unit 7.19 Radiation Fin Temperature Rise L4 Error Code Outdoor Unit LED Display Aj 1h 2h 3h 4i 5h Method of Error Detection A radiation fin temperature rise is detected by checking the radiation fin temperature with the compressor on. Error Decision Conditions The radiation fin temperature with the compressor on is above A. The error is cleared when the temperature drops below B.
Troubleshooting for Outdoor Unit SiUS121502E 7.20 Output Overcurrent Detection Error Code L5 Outdoor Unit LED Display Aj 1h 2h 3i 4h 5h Method of Error Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Error Decision Conditions A position signal error occurs while the compressor is running. A rotation speed error occurs while the compressor is running.
SiUS121502E Troubleshooting for Outdoor Unit Troubleshooting Caution Check No.15 Refer to P.171 Check No.17 Refer to P.173 Check No.18 Refer to P.173 Check No.22 Refer to P.176 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.
Check SiUS121502E 8. Check 8.1 Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using multimeter. The data is for reference purpose only. Thermistor temperature Resistance (kΩ) °C °F –20 –4 197.8 –15 5 148.2 –10 14 112.1 –5 23 85.60 0 32 65.93 5 41 51.14 10 50 39.99 15 59 31.52 20 68 25.02 25 77 20.00 30 86 16.10 35 95 13.04 40 104 10.62 45 113 8.707 50 122 7.
SiUS121502E 8.2 Check Indoor Fan Motor Connector Check Check No.02 CTXS, FTXS, FVXS Series 1. Check the connection of connector. 2. Check motor power supply voltage output (pins 4 - 7). 3. Check motor control voltage (pins 4 - 3). 4. Check rotation command voltage output (pins 4 - 2). 5. Check rotation pulse input (pins 4 - 1). S1 7 6 5 4 3 2 1 Motor power supply voltage (310 ~ 340 VDC) Unused Unused GND Motor control voltage (15 VDC) Rotation command voltage (1~ 6.
Check 8.4 SiUS121502E Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2) [Fig.1] [Fig.
SiUS121502E 8.5 Check Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly inserted in the PCB. Match the EV unit number and the connector number. 2. Turn the power off and on again, and check if all the EVs generate a latching sound. 3. If any of the EVs does not generate a latching sound in the above step 2, disconnect that connector and check the continuity using a multimeter.
Check 8.6 SiUS121502E Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. Start heating operation. S80 voltage at 208 - 230 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling / Dry / Defrost: Not energized Heating: energized NO Replace the outdoor unit PCB (main PCB). YES Disconnect the four way valve coil from the connector and check the continuity.
SiUS121502E 8.8 Check Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.). The inverter analyzer makes it possible to judge the cause of trouble easily and securely.
Check SiUS121502E Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. (3) If NG in Check No.22, replace the power module. (Replace the main PCB. The power module (IPM1) is united with the main PCB.) If OK in Check No.22, check if there is any solder cracking on the PCB.
SiUS121502E Check 8.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air suction and discharge area. NG Change the installation location or direction. OK Is the discharged air short-circuited? YES Change the installation location or direction. NO Is the outdoor heat exchanger very dirty? YES Clean the outdoor heat exchanger.
Check SiUS121502E 8.12 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Is the outdoor fan running? NO Fan motor lead wire connector disconnected? YES NO Go to Check No. 16. YES Outdoor fan system is functioning. Reconnect the connector. (R21195) 8.13 Main Circuit Short Check Check No.
SiUS121502E Check 8.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC. voltage range) (R21938) To prevent an electrical shock, use a multimeter to check that the voltage between FU2 and DC– is 50 V or less. The surface of the test points (DC–) may be covered with the coating.
Check SiUS121502E 8.15 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector. Follow the procedure below to measure resistance between the (+) or (–) terminal of the power module and the U, V, or W terminal of the compressor with a multimeter.
SiUS121502E Part 7 Trial Operation and Field Settings 1. Pump Down Operation............................................................................178 2. Wiring Error Check Function ...................................................................179 3. Trial Operation ........................................................................................ 181 3.1 CTXS, FTXS, CDXS, FDXS, FVXS Series .............................................. 181 3.2 FFQ Series ...................................
Pump Down Operation SiUS121502E 1. Pump Down Operation Pump Down Operation In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. 1. 2. 3. 4. Remove the valve caps from the liquid stop valve and the gas stop valve. Carry out forced cooling operation. After 5 ~ 10 minutes, close the liquid stop valve with a hexagonal wrench. After 2 ~ 3 minutes, close the gas stop valve and stop the forced cooling operation.
SiUS121502E Wiring Error Check Function 2. Wiring Error Check Function Outline Wiring error check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch on the outdoor unit. Even if the connections for Room A and Room B are confused, the system may run without a hassle. Note that this check function does not work in the following cases.
Wiring Error Check Function SiUS121502E Refrigerant flows from Port A and on. The indoor heat exchanger temperatures are detected Details one by one to check up the matching between the piping and wiring. With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a problem. (This is because the indoor heat exchanger temperature is made to drop below 0°C (32°F) in order to increase the detection accuracy.) The indoor fan turns on or off during wiring checking.
SiUS121502E Trial Operation 3. Trial Operation 3.1 CTXS, FTXS, CDXS, FDXS, FVXS Series Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Detail 1. Measure the power supply voltage and make sure that it falls within the specified range. 2.
Trial Operation SiUS121502E ARC466 Series (1) Press the On/Off button to turn on the system. (2) Press the center of the Temp button and the Mode button at the same time. (3) Select T (trial operation) with the Temp or Temp button. (4) Press the Mode button to start the trial operation. (5) Press the Mode button and select operation mode. (6) Trial operation terminates in approx. 30 minutes and switches into normal mode. To quit trial operation, press the On/Off button.
SiUS121502E 3.2 Trial Operation FFQ Series 3.2.1 Checkpoints To carry out test operation, check the following: Check that the temperature setting of the remote controller is at the lowest level in cooling operation or use test operation mode. Go through the following checklist: Checkpoints Cautions or warnings Are all units securely installed? z Dangerous for turning over during storm z Possible damage to pipe connections Dangerous if electric leakage occurs.
Trial Operation SiUS121502E Step Action Remote controller How to check airflow direction Push the Menu/OK button to enter the Main 8 Menu. 9 Use the buttons to select Airflow Direction and push the Menu/OK button. (R18829) 10 Check that the airflow direction is actuated according to the setting and push the Menu/OK button. (R18830) How to deactivate test operation 11 12 Press and hold the Cancel button for 4 seconds to enter the Service Settings menu.
SiUS121502E Field Settings 4. Field Settings 4.1 Outdoor Unit 4.1.1 Priority Room Setting Outline 1. Operation mode The operation mode of the prioritized room takes precedence. For example, when the prioritized indoor unit starts cooling operation, the other indoor units which have been in heating operation enter the standby mode. Heating operation will resume if the prioritized indoor unit stops cooling operation. 2.
Field Settings SiUS121502E 4.1.2 COOL / HEAT Mode Lock Use the S15 connector to set the unit to cooling only or heating only. Setting to heating only (H): Short-circuit the pins 1 and 3 of the connector S15. Setting to cooling only (C): Short-circuit the pins 3 and 5 of the connector S15. The following specifications apply to the connector housing and pins. JST products: Housing: VHR-5N Pin: SVH-21T-1, 1 Note that forced operation is also possible in cooling / heating mode.
SiUS121502E 4.2 Field Settings CTXS, FTXS, CDXS, FDXS, FVXS Series 4.2.1 Model Type Setting ARC452A21, ARC452A23 The remote controller is common to the heat pump model and cooling only model. Make sure the DIP switch is set to the left side. The heating operation will not be available when the DIP switch is set to the right side. Heat pump model Cooling only model DIP switch DIP switch (R18201) ARC466A21 The remote controller is common to the heat pump model and cooling only model.
Field Settings SiUS121502E 4.2.2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. ARC452A21, ARC452A23 Press the TEMP and TEMP temperature display. buttons at the same time for 5 seconds to change the unit of (R14477) ARC466A21 Press the upper side of the Temp button and the On button at the same time for 5 seconds to change the unit of temperature display.
SiUS121502E Field Settings 4.2.3 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. The method of address setting varies depending on the type of indoor unit and the series of wired remote controller.
Field Settings FVXS Series SiUS121502E (1) Remove the front grille. (2) Lift the sensor PCB fixing plate and remove the front shield plate. (3) Disconnect the connectors S1, S41, S42. (4) Remove the electric box (1 screw). (5) Pull out the indoor heat exchanger thermistor. (6) Remove the shield plate (8 tabs). (7) Cut the address setting jumper JA on the indoor unit PCB. (5) Indoor heat exchanger thermistor Connector S42 Connector S41 (3) Connector S1 (4) Remove the screw.
SiUS121502E Wireless Remote Controller Field Settings (1) Remove the cover and take it off. (2) Cut the address setting jumper. ARC452 series ARC466 series Jumper Jumper ADDRESS EXIST 1 CUT 2 Caution (R12065) ADDRESS EXIST 1 CUT 2 ∗ Do not cut the left jumper. (R18416) Replace the remote controller if you accidentally cut a wrong jumper. Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them. 4.2.
Field Settings 4.3 SiUS121502E FFQ Series 4.3.1 How to Change the Field Settings Outline If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. Refer to the instruction manual for each optional accessory. BRC1E71/72/73 Note: The illustrations are for BRC1E72 as representative. d b c a (R18831) a b c d Unit No. First code No. Second code No.
SiUS121502E Field Settings Step 6 7 Action Remote controller Push the Menu/OK button to display the confirmation screen. Use the buttons to select Yes and push the Menu/OK button. (R18834) When multiple setting changes are needed, repeat steps 3 to 7. 8 Push the Cancel button 2 times to return to basic screen. BRC7E830 Mode No. Field setting mode UP button DOWN button RESERVE button First code No. MODE button Second code No.
Field Settings SiUS121502E 4.3.2 Overview of the Field Settings 0 Second Code No. Description of setting Filter cleaning sign interval 10 (20) 12 (22) Longlife filter type 2 3 Remote controller thermistor Filter cleaning sign Indoor unit number of simultaneous operation system Simultaneous operation system individual setting Fan OFF at thermostat OFF 1 2 01 02 Approx. 10,000 hrs. Approx. 2,500 hrs. Longlife filter Enabled Display Approx. 5,000 hrs. Approx. 1,250 hrs.
SiUS121502E Field Settings 4.3.3 MAIN / SUB Setting when Using 2 Wired Remote Controllers Outline The MAIN / SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB. Detail The remote controllers are factory set to MAIN, so you only have to change one remote controller from MAIN to SUB.
Field Settings SiUS121502E 4.3.4 Address and MAIN / SUB Setting for Wireless Remote Controller Outline If several wireless remote controller units are used together in the same room (including the case where both group control and individual remote controller control are used together), be sure to set the addresses for the receiver and wireless remote controller. (For group control, see the attached installation manual for the indoor unit.
SiUS121502E Wireless Remote Controller (Factory Set is 1) Field Settings 1. Hold down the FILTER SIGN RESET ( ) button and the INSPECTION/TEST button at the same time for at least 4 seconds to enter the field setting mode. (SETTING is indicated on the display). 2. Press the FAN button and select A or b. Each time the button is pressed, the display switches between A and b. 3. Press the UP button and the DOWN button to set the address.
Field Settings SiUS121502E After Setting Stick the unit No. label at the decoration panel air discharge outlet as well as on the back of the wireless remote controller. Wireless remote controller 1 Unit No. label Decoration panel (R12961) Note: 198 Set the unit No. of the receiver and the wireless remote controller to be the same. If the settings differ, the signal from the remote controller cannot be received.
SiUS121502E Silicon Grease on Power Transistor / Diode Bridge 5. Silicon Grease on Power Transistor / Diode Bridge Outline Apply the specified silicon grease to the heat radiation part of a power transistor / diode bridge when you replace an outdoor unit PCB. The silicon grease encourages the heat radiation of a power transistor / diode bridge. Detail 1. 2. 3. 4. Wipe off the old silicon grease completely. Apply the silicon grease evenly. See the illustrations below for examples of application.
SiUS121502E Part 8 Appendix 1. Piping Diagrams......................................................................................201 1.1 Indoor Unit................................................................................................ 201 1.2 Outdoor Unit ............................................................................................. 204 2. Wiring Diagrams......................................................................................206 2.1 Indoor Unit....................
SiUS121502E Piping Diagrams 1. Piping Diagrams 1.1 Indoor Unit CTXS07LVJU, FTXS09/12LVJU FTXS15/18LVJU INDOOR UNIT INDOOR UNIT 5/16 CuT 1/4 CuT DISTRIBUTOR HEAT EXCHANGER HEAT EXCHANGER FIELD PIPING 1/4 CuT FIELD PIPING 3/8 CuT CROSS FLOW FAN THERMISTOR ON HEAT EXCH. FIELD PIPING 1/4 CuT M CROSS FLOW FAN THERMISTOR ON HEAT EXCH.
Piping Diagrams SiUS121502E CDXS15/18LVJU CDXS24LVJU INDOOR UNIT INDOOR UNIT (3/8CuT) (1/4 (6.4mm) CuT) HEAT EXCHANGER FIELD PIPING (1/4 (6.4mm) CuT) THERMISTOR ON HEAT EXCH. SIROCCO FAN HEAT EXCHANGER FIELD PIPING (1/4CuT) SIROCCO FAN M M FAN MOTOR FAN MOTOR (1/2 (12.7mm) CuT) FIELD PIPING (1/2 (12.7mm) CuT) THERMISTOR ON HEAT EXCH.
SiUS121502E Piping Diagrams FFQ09/12/15/18LVJU Indoor heat exchanger Field piping φ A C1220T-O Field piping φ B C1220T-O To Outdoor unit Indoor unit A B FFQ09 · 12LVJU 1/4 (6.4) 3/8 (9.5) FFQ15 · 18LVJU 1/4 (6.4) 1/2 (12.
Piping Diagrams 1.
SiUS121502E Piping Diagrams 4MXS36NMVJU OUTDOOR UNIT HEAT EXCHANGER 5/16 CuT OUTDOOR AIR THERMISTOR HEADER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR EVA 5/16 CuT 1/4 CuT FILTER 5/16 CuT 5/16 CuT HEAT EXCHANGER (CONDENSER) THERMISTOR 5/16 CuT 1/2 CuT 5/16 CuT 5/8 CuT HEADER 5/16 CuT DC FAN MOTOR M CAPILLARY TUBE PROPELLER FAN FOUR WAY VALVE 1/2 CuT 5/16 CuT MUFFLER WITH FILTER 3/8 CuT 3/8 CuT DISTRIBUTOR 5/16 CuT EVB EVC EVD 1/4 CuT 1/4 CuT ROOM D (1/4 CuT) GAS PIPE THERMIS
Wiring Diagrams SiUS121502E 2. Wiring Diagrams 2.1 Indoor Unit CTXS07LVJU, FTXS09/12LVJU 1 PCB3 S49 LED1 H1P 1 PCB1 S46 1 BLK BLK ~ BLK V1 - BLK H1 3.15A C102 BLK LED2 H2P X1M FU1 F1U MR10 H2 2 RED 3 3 BLK 9 9 BLK GRN/YLW H3 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiUS121502E Wiring Diagrams FTXS15/18/24LVJU 1 PCB3 S49 1 LED1 H1P PCB1 S46 1 BLK FU1 F1U BLK ~ BLK H1 3.15A C102 BLK LED2 H2P X1M V1 BLK H2 MR10 2 RED 3 C101 BLK 9 SW1 t˚ FU2 F2U HA RTH1 R1T 7 S1 RED 3.
Wiring Diagrams SiUS121502E FDXS09/12LVJU, CDXS15/18/24LVJU A1P H1 A2P F1U 3.15A V1TR LED LED LED H1P H2P H3P S1 1 S26 1 H2 H3 FOR ( TERMINAL CENTRALIZED CONTROL ) S21 S1W SIGNAL RECEIVER 10 2 RTH1 1 3 t° R1T t° RED S7 1 1 2 RED 3 INDOOR GRN/YLW : PROTECTIVE GROUND C1 : CAPACITOR (M1F) F1U : FUSE BLU FIELD WIRING. CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
SiUS121502E Wiring Diagrams FVXS09/12/18NVJU PCB2 PCB3 S27 S2W(4) S26 V1 F1U ~RECTIFIER~ H1 BLK WHT RED 3.15A H2 S4W GRN GRN/YLW MR10 WIRELESS REMOTE CONTROLLER PCB4 S1W LED1 LED2 H1P H2P S47 S46 F2U 3.15A E1 S1 7 4 1 M1S M2S INDOOR M RED ORG YLW PNK BLU M RED ORG YLW PNK BLU S42 1 S21 E3 BLU BRN ORG WHT M HA M1F t˚ S48 S49 R1T 6 S41 1 PCB1 S32 5 CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Wiring Diagrams SiUS121502E FFQ09/12/15/18LVJU PILOT LAMP (ON-RED) PILOT LAMP (TIMER-GREEN) H3P PILOT LAMP (FILTER SIGN-RED) H4P PILOT LAMP (DEFROST-ORANGE) SS1 SELECTOR SWITCH (MAIN/SUB) SS2 SELECTOR SWITCH (WIRELESS ADDRESS SET) CONNECTOR FOR OPTIONAL PARTS X24A CONNECTOR (WIRELESS REMOTE CONTROLLER) X33A CONNECTOR (ADAPTOR FOR WIRING) X35A CONNECTOR (GROUP CONTROL ADAPTOR) X40A CONNECTOR (ON/OFF INPUT FROM OUTSIDE) H1P H2P NOTES) 1.
SiUS121502E 2.2 Wiring Diagrams Outdoor Unit 2MXS18NMVJU SW4 M1C SW6 SW5 S2 X3M 1 2 3 1 FU3 HL1 30A V2 3 S80 MRM20 MRM10 FU1 3.
Wiring Diagrams SiUS121502E 3MXS24NMVJU 5 1 FU2 3.
SiUS121502E Wiring Diagrams 4MXS36NMVJU YLW 1 MRM10 3 S80 ~+ PS BLU YLW RED BLU YLW RED BLU BRN ORG WHT RED Z3C N=3 4321 W V U S70 WVU + : CAPACITOR : DIODE BRIDGE : FUSE : INTELLIGENT POWER MODULE : LIVE : PILOT LAMP : COMPRESSOR MOTOR : FAN MOTOR MRM10, MRM20 MR4 PCB1, 2 PS Q1L R1T~R7T, R9T~R12T SA1 SHEET METAL : MAGNETIC RELAY : MAGNETIC RELAY : PRINTED CIRCUIT BOARD : SWITCHING POWER SUPPLY : OVERLOAD PROTECTOR : THERMISTOR : SURGE ARRESTER : TERMINAL STRIP FIXED PLATE
Revision History Month / Year Version 07 / 2015 SiUS121502E Revised contents First edition
z Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorized importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used. This statement does not purport to exclude, restrict or modify the application of any local legislation. z Ask a qualified installer or contractor to install this product.
