Service Manual EMD series Indoor Units Outdoor Units EMD 27 OU6-27 EMD 35 OU8-33 EMD 40 OU10-38 EMD 45 OU10-44 EMD 50 OU10-50 EMD 60 OU12-60 REFRIGERANT R22 R407C HEAT PUMP COOLING ONLY JULY 2005 CONTENT DUCTED
LIST OF EFFECTIVE PAGES LIST OF EFFECTIVE PAGES Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page (when none indicates no changes in the relevant page). All pages in the following list represent effected/ non effected pages divided by chapters. Dates of issue for original and changed pages are: Original ....... 0 ........ July 2005 Total number of pages in this publication is 109 consisting of the following: Page No. Revision No. # Title .......................
TABLE OF CONTENTS Table of Contents 1. FEATURES ............................................................................................................1-1 2. PRODUCT DATA SHEET ......................................................................................2-1 3. RATING CONDITIONS ..........................................................................................3-1 4. OUTLINE DIMENSIONS .......................................................................................4-1 5.
FEATURES 1. FEATURES MODES OF OPERATION , FUNCTIONS AND FEATURES The air conditioner is based on a microcomputer control system with remote wall mounted LCD display and control unit, programmed for the following modes and functions: COOL Cools, dehumidifies and filters the room air. Maintains desired site temperature. HEAT Heats and filters the air. Maintains desired site temperature.
FEATURES VERTICAL AIR SWING Not Applicable in Ducted unit. AIR DIRECTION POSITIONING Not Applicable in Ducted unit. ROOM TEMP. FILTER INDICATION BUZZER ON UNIT OPERATION 3-MIN DELAYED RUN MEMORY LOCK 1-2 Measures and displays room temperature. Filter indicator on the indoor unit display is turned on when the filter requires cleaning. After cleaning and reinstalling the filter, the system should be reset.
PRODUCT DATA SHEET 2. PRODUCT DATA SHEET 2.1 R22/R407C Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
PRODUCT DATA SHEET Model (Indoor & Outdoor) Installation method Characteristics Capacity OUTDOOR INDOOR Power input COP Power supply Rated current Starting current Circuit breaker rating Fan type & quantity Fan speeds H/ M/ L Air flow * H/ M/ L External static pressure Min-Max Sound power level ** H/ M/ L Sound pressure level *** H/ M/ L Moisture removal Condensate drain tube I.
RATING CONDITIONS 3. RATING CONDITIONS NOTES: 1. Rating conditions ISO/CD 13253R Cooling: indoor: 27qC (80qF) DB 19qC (66qF) WB Outdoor: 35qC (95qF) DB Heating: indoor: 20qC (68qF) DB Outdoor: 7qC (45qF) DB 6qC (43qF) WB Refrigerant tubing length (one way) 7.5m (24.6 ft) 2.
OUTLINE DIMENSIONS 4. OUTLINE DIMENSIONS 4.1 Indoor Unit: EMD 27, 35, 40 600 4.2 Indoor Unit: EMD 45, 50 600 4.
OUTLINE DIMENSIONS 4.4 Outdoor Unit: OU6-27 4.
OUTLINE DIMENSIONS 4.6 Outdoor Unit: OU10-38/45/50 4.
WIRING DIAGRAMS 5. WIRING DIAGRAMS 5.
WIRING DIAGRAMS 5.
WIRING DIAGRAMS 5,3 EMD 35 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT 5-3 DUCTED
WIRING DIAGRAMS 5.
WIRING DIAGRAMS 5.
WIRING DIAGRAMS 5,6 EMD 50 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR 5-6 Revision Y05-01 CONTENT Service Manual - EMD Series DUCTED
WIRING DIAGRAMS 5,7 EMD 60 3PH OUTDOOR POWER SUPPLY INDOOR OUTDOOR Service Manual - EMD Series Revision Y05-01 CONTENT 5-7 DUCTED
REFRIGERATION DIAGRAMS 6. REFRIGERATION DIAGRAMS 6.
REFRIGERATION DIAGRAMS 6.
REFRIGERATION DIAGRAMS 6.
REFRIGERATION DIAGRAMS 6.
REFRIGERATION DIAGRAMS 6.
REFRIGERATION DIAGRAMS 6.6 Additional Refrigerant Charge (R 22, R407C gr.
CONTROL SYSTEM 7. CONTROL SYSTEM Instructions for Electronic Control Service Package INTRODUCTON The electronic control package is designated for service and is common for the following group of air-conditioners. 1. ST/RC group - Cooling only / Cooling and Heating by heat pump. 2. SH group - Cooling and Heating by heat pump and supplementary heater. 3. RH group - Cooling and Heating by heaters only. Before installation , be sure that you select and set for the right group .
CONTROL SYSTEM DUCTED SPLIT A.C CONTROLS, MAIN P.C.B 8 POWER CONTROLLE POWE OLLER REV. 01 03/2004 7-2 Revision Y05-01 CONTENT SERIES: EMD PG.
CONTROL SYSTEM FIG.4 ELECTRICAL ASSEMBLY – EMD FOR COMPONENTS DESCRIPTION AND CATALOG NUMBERS REFER TO SPARE PARTS LIST FOR THE RELEVANT PRODUCT NO. REV. 01 03/2004 Service Manual - EMD Series Revision Y05-01 CONTENT SERIES: EMD PG.
CONTROL SYSTEM GANG BOARD DISPLAY BOARD 7-4 Revision Y05-01 CONTENT Service Manual - EMD Series DUCTED
CONTROL SYSTEM CONFIGURATION OF THE APPLIANCE REMOTE CONTROL DIP SWITCH SETTING SETTING SWITCH STATUS SW. NO. 1 OFF ON OFF ON _ _ _ _ SW. NO. 2 OFF OFF ON ON _ _ _ _ DEFINITION SW. NO. 3 SW. NO.4 RC3 RC4 _ _ RC-ALL MODES OF OPERATION _ _ STD-COOL, FAN, DRY, ACTIVE _ _ HEAT-COOL, FAN, DRY, ACTIVE _ _ AUTO FAN (AF) OFF _ TEMP. DISPLAY IN qC DEGREES VERTICAL SWING ONLY ON _ TEMP.
CONTROL SYSTEM 1 1.1 Legend Abbreviations AC A/C ANY CLOCK COMP CPU CTV HE HPC H/W ICP ICT IF, IFAN IR LEVEL1 LEVEL2/3 LEVEL4 Max Min min NA OCP OCT OF, OFAN OPER Para.
CONTROL SYSTEM 2 General functions for all models 2.1 COMP operation 2.1.1 2.1.2 For each Mode including POWER OFF & SB, a Min time delay of 3 min before COMP restarting, excluding DEICING Mode (see 7.2.1). The Min operation time of COMP under different operating conditions is Min operation time of Operation Mode COMP Heat, Cool, H.P protection or Auto Modes 3 min. Fan, Dry, Overflow, Protection modes, or mode change ignored 2.2 IFAN operation 2.2.1 2.2.2 2.2.
CONTROL SYSTEM 2.6 Thermistors operation 2.6.1 2.6.2 2.6.3 Return air Temp. is detected by RAT in normal Mode, or by RCT (R/C sensor) in I-FEEL Mode. Indoor Coil Temp. is detected by ICT. Outdoor Coil Temp. is detected by OCT. 2.6.4 Definition of thermistor faults: a. Thermistor is disconnected The thermistor reading is below -30oc. 2.6.5 b. Thermistor is shorted The thermistor reading is over 75oc. c.
CONTROL SYSTEM 3 Cooling Mode 3.1 Cooling Mode – General 3.1.1 Mode Definition MODE: COOL, AUTO (AT COOLING) TEMP: SELECTED DESIRED TEMPERATURE. FAN: HIGH, MED, LOW, AUTO. TIMER: ANY I FEEL:ON OR OFF 3.1.2 Room Temperature, RT, is detected by x RAT in normal operation, or x RCT (R/C sensor) in I-FEEL mode. 3.1.3 Indoor Coil Temp is detected by ICT. 3.1.4 Outdoor Coil Temp is detected by OCT. 3.2 Control Functions 3.2.1 COMP Operation COMP ON OFF 0 1 RT-SPT 3.2.
CONTROL SYSTEM 3.3 Sequence Diagrams 3.3.1 Maintaining room temp at desired level by comparing RT and SPT with user defined IFAN speed.
CONTROL SYSTEM 3.3.2 Maintaining room temp at desired level by comparing RT and SPT with AUTO-IFAN. +4 +3 +2 +1 0 -1 -2 (RT - SPT) [oc] ON COMP (WVL) OFF ON OFAN OFF H IFAN M L ON RV Note: OFF Refer to Sect 2.22.2 for IFAN operations in Auto-fan mode.
CONTROL SYSTEM 4 Heating Mode 4.1. Heating Mode - General 4.1.1. Compensation Procedure When I feel is OFF during heat mode: RT= RAT – CTV. When I feel is ON during heat mode: RT= RCT. Model WNG, WMN, RWK. MBX, PX, PRX, P2000, PXD WMF, WAX EMD/ELD ECC-K CTV +3 oC +0 oC +2 oC +4 oC +4 oC No compensation will be activated in Forced operation modes (Cf. Sect 11). 4.1.2.
CONTROL SYSTEM 4.1.2 Heaters operation rules for RC and SH groups (a) For both RC and SH groups, Heaters versus T is as the following: ON HE1 OFF ON HE2 OFF 1 2 3 T=SP-RT [oc] 4 (b) Operation rules for Heaters in RC group: (i) Heaters can be enabled only if IFAN is ON.
CONTROL SYSTEM 4.1.5 Heaters operation rules for RH groups (a) In RH group, HE operation is according to the difference between RAT and SPT. ON H E2 O FF ON H E1 O FF -1 4.1.6 0 2 T=SP-R T [ o c] OFAN Operation for RC and SH groups (i) As a general rule for RC and SH groups, excluding protection modes, OFAN starts with the compressor. (ii) When OFAN is then ON it will operate according to the following conditions: a) OFAN operates together with the compressor.
CONTROL SYSTEM 4.2. Heating, RC or SH Group Mode: Temp: Fan: Timer: I Feel: Heat, Auto (at heating) Selected desired temperature HIGH, MED, LOW Any On or Off Sequence Diagram Maintains room temp. at desired level by comparing RAT or RCT to SPT.
CONTROL SYSTEM 4.3. Heating, RC or SH Group with Autofan Mode: Temp: Fan: Timer: I Feel: Heat, Auto (at heating) Selected desired temperature Auto Any On or Off Sequence Diagram Maintains room temp at desired level by controlling COMP, IFAN and OFAN.
CONTROL SYSTEM 4.4. Heating, RH Group Mode: Temp: Fan: Timer: I Feel: Heat, Auto (at Heating) Selected desired temperature HIGH, MED, LOW Any On or Off Sequence Diagram Maintains room temp at desired level by controlling Heating Elements : HE1 or HE2.
CONTROL SYSTEM 4.5. Heating, RH Group, with Autofan Mode: Temp: Fan: Timer: I Feel: Heat, Auto (at Heating) Selected desired temperature Auto Any On or Off Sequence Diagram Maintains room temp at desired level by controlling the 2-Stage Electric Heaters.
CONTROL SYSTEM 5 Automatic Cooling or Heating 5.1 Automatic Cooling or Heating - General The Auto Mode is for model with compressor and the WVL-RH only. The WVL-ST, RC and SH units do not work in Auto Mode. 5.1.1 Mode Definition Mode: Temp: Fan: Timer: I Feel: Auto Selected desired temperature Any Any On or Off 5.1.2 Switching-temperature between Cooling and Heating is SPT r 3oc. 5.1.3 When the Auto Mode is started with SPT +/-0oc, the unit will not select Auto Heat or Auto Cool mode immediately.
CONTROL SYSTEM 5.2 Sequence Diagrams 5.2.1 Auto Cooling or Heating, RC or SH Groups Maintains room temp at desired level by selecting between cooling and heating modes.
CONTROL SYSTEM 5.2.2 Auto Cooling or Heating RH Group Maintains room temp at desired level by selecting between Cooling or Heating Modes.
CONTROL SYSTEM 6 Dry Mode 6.1 Dry, ST or RC group or P2000 model with any group settings Mode: Temp: Fan: Timer: I FEEL: Dry Selected desired temp Low (automatically selected by software) Any Any Control function Reduce room humidity with minimum temp. fluctuations by operating in Cool Mode with low speed IFAN. (RT - SPT) [ oc] +2 +1 0 10 20 40 30 50 Time [min] -1 -2 DRY-ON DRY DRY-OFF LOW IFAN OFF 5 minutes COMP ON time ON COMP & OFAN OFF Max 15 minutes ON HE1 & HE2 3.
CONTROL SYSTEM 6.2. Dry, SH or RH group excluding P2000 model Mode: Temp: Fan: Timer: I FEEL: Dry Selected desired temp. Low (automatically selected by software) Any Any Control function Reduce room humidity with minimum Temp. fluctuations by operating in Cool Mode with low speed IFAN and HE.
CONTROL SYSTEM 7 Protection 7.1. Cooling Mode Protections 7.1.1. Mode: Temp: Fan: Timer: I Feel: Indoor Coil Defrost Cooling, Dry, Auto Selected desired temp. Any Any On or Off Control Function Protect the indoor coil from ice formation at low ambient temperature.
CONTROL SYSTEM 7.1.2. Mode: Temp: Fan: Timer: I Feel: High Pressure Protection (Auto) Cooling or Dry Selected desired temp. Any Any On or Off Control Function To protect the COMP from the high pressure built-up in the outdoor coil during normal cooling operation, by switching OFF the IFAN and COMP.
CONTROL SYSTEM 7.2. Heating Mode Protections 7.2.1. Outdoor coil Deicing (excluding RH Group) Mode: Heating, Auto (at heating) Temp: Selected desired Temp Fan: Any Timer: Any I FEEL:Any Control function To protect the Outdoor coil from ice formation by controlling COMP & RV operation. 7.2.1.1. Deicer Activation Algorithm 1. 2. 3. 4.
CONTROL SYSTEM 7.2.1.2. Deicing procedure OCT [oc] 12 DOC 0 DST (DDT) 3 min 3 min 36s max 12 min. 36s ON COMP OFF DI (note 1) DI (note 2) ON OFAN OFF 30s 30s ON RV DT OFF RC or WAX units all SH units except WAX ANY IFAN L IFAN is forced to Low Speed ON HE HEs are forced ON ANY ANY IFAN Note 3 OFF ANY HE OFF HEs are forced OFF ON OPER LED BLINK Notes : 1.
CONTROL SYSTEM 7.2.2. High pressure protection (excluding RH Group) Mode: (Auto) Heating Fan: Any Timer: Any I Feel: On or Off Control Function Protect the Compressor from high pressure by switching OFF the OFAN and COMP.
CONTROL SYSTEM SELF TEST for General Controller STEP 1: TURNING ON THE POWER . Turn ON the power, make sure that the unit is in operation. STEP 2 : ENABLE SELF TEST MODE 1. Use the Remote control to send the first settings to display / indoor unit Heat mode, High IFAN, set temperature 16 ºC , no I FEEL Sleep or any Timer settings needed. 2. Cover the IR transmitter components in the head of the remote control so that it will not transmit the signals to the indoor unit display. 3.
CONTROL SYSTEM STEP 3 :AUTO LED WALK TEST. 1) All the LEDS will turn OFF. 2) All the LEDS will turn ON for 1 second one by one in the following sequence : STAND-BY Ö OPERATE Ö TIMER Ö FILTER Ö COOL Ö HEAT. 3) In PRX all the LEDS will turn ON for 1 second one by one in the following sequence : 18 °c Ö 20 °c Ö 22 °c Ö 24 °c Ö 26 °c Ö 28 °c Ö 30 °c Ö High IFAN Ö Auto IFAN Ö Med IFAN Ö Low IFAN Ö STAND-BYÖ TIMER Ö FILTER ÖCOOLÖ HEAT.
CONTROL SYSTEM STEP 8 : MEMORY TEST (EEPROM) The test purpose is to check if the memory is functioning correctly. The test result is reported by using the STAND-BY and FILTER LEDS: LED indicator STAND-BY LED FILTER LED Condition for LED to be ON Test passed Test failed AT THIS POINT THE SELF-TEST IS COMPLETED. In order to terminate self-test mode the User can change the unit setting from "Cool Mode, Low FAN" to " Cool Mode, Med FAN" or to wait without using the Remote control for 60 sec.
CONTROL SYSTEM SELF TEST DIAGRAM FOR CONTROLLER (VERSION 4V5 OR HIGHER) Step 1 SHORT JUMPER J1 (CONTROL PCB) RC/ST TEST MODEL CONFIGURATION TEST Step 2 PRESS ON POWER BUTTON STEP MOTOR TEST FREQUENCY TEST Step 3 PRESS ON MODE BUTTON STANDBY LEDS OFF OPERATE LEDS ON TEST TIMER AUTO RELAY TEST COOL HEAT INDOOR FAN SPEED TEST COMPRESSOR OUTDOOR FAN Step 4 PRESS ON RESET BUTTON BUZZER TEST (ONE BEEP SOUND) Step 5 PRESS ON FAN BUTTON ON THE REMOTE CONTROL REMOTE CONTROL TO CPU COMUNICATI
CONTROL SYSTEM System diagnostics Pressing Mode button for 5-10 seconds in SB or any other operation mode will activate diagnostic mode by the acknowledgment of 3 short beeps and lighting of COOL and HEAT LEDs. In diagnostic mode, system problems will be indicated by blinking of Heat & Cool LEDs. The coding method will be as follow: Heat led will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds.
