Table of Contents Page 1. Safety Precautions......................................................................................... 1 1. In case of Accidents or Emergency 2. Pre-Installation and Installation 3. Operation and Maintenance 2. Specifications................................................................................................. 3 1. Model Reference 2. Electrical Wiring Diagrams 3. Product Features............................................................................
Safety Precautions Contents 1. In Case of Accidents or Emergency.......................................................................2 2. Pre-Installation........................................................................................................2 3. Operation and Maintenance..................................................................................
Safety Precautions To prevent personal injury, or property or unit damage, adhere to all precautionary measures and instructions outlined in this manual. Before servicing a unit, refer to this service manual and its relevant sections. Failure to adhere to all precautionary measures listed in this section may result in personal injury, damage to the unit or to property, or in extreme cases, death.
Specifications Contents 1. Model Reference.....................................................................................................4 2. Electrical Wiring Diagrams.....................................................................................5 2.1 Indoor Unit.....................................................................................................5 2.2 Outdoor Unit..................................................................................................
1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment.
2. Electrical Wiring Diagrams Indoor unit Abbreviation Paraphrase Y/G Yellow-Green Conductor ION Positive and Negative Ion Generator CAP Capacitor PLASMA Electronic Dust Collector L LIVE N NEUTRAL Heater The Electric Heating Belt of Indoor Unit T1 Indoor Room Temperature T2 Coil Temperature of Indoor Heat Exchanger Middle Specifications 2.
PIAW9169A, PIAW12169A, PIAW12179A, PIAW18179A, PIAW24179A, PIAW30179A, PIAW36179A 16022000019694 M OPTI ONAL Y/ G I ON M M 5 Specifications CN12_1 CN12_2 HEATER CN6_1 CN6_2 1 2 OPTIONAL 3 INDOOR WIRING DIAGRAM Page 6 2 OPTIONAL
Outdoor Unit Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN CT1 AC Current Detector COMP Compressor L-PRO Low Pressure Switch H-PRO High Pressure Switch T3 Coil Temperature of Condenser T4 Outdoor Ambient Temperature TH Compressor Suction Temperature TP Compressor Discharge Temperature EEV Electronic Expansive Valve Specifications 2.
PIAW12180B Y/G Y/G BLUE OR BLACK BROWN 2 1 3 Specifications Y/G I NDOOR UNI T 4-WAY CRANKCASE HEATER PAN HEATER CAPACITOR RED AC-FAN BLUE BLACK U V AMBIENT TEMP. SENSOR CONDENSER TEMP.
PIAW18180B,, PIAW24180B, 3 HEATER 2 Applicable to the units adopting DC motor only Applicable to the units adopting AC motor only Specifications CN4 OPTIONAL： CN30 BROWN CN3 OPTIONAL BLUE （YELLOW） OPTIONAL RED BLACK(BLUE) Y/G TO I NDOOR UNI T POWER SUPPLY 16022000019211 OUTDOOR WIRING DIAGRAM Page 9
PIAW30180B, PIAW36180B Applicable to the units adopting DC motor only BLACK RED BLUE EEV Applicable to the units adopting AC motor only ~ 3 M 5(6) 3 5 RED CN19 CN55 7 CN42 CN43 CN33 CN20 Specifications BLACK W BLACK DRIVER BOARD 4-WAY1 BLUE CN3 BLACK CN4 U BLUE CN54 BLUE SV V RED RED CN10 HEAT1 CN2 CN41 CN22 CN51 CN1 CN40 CN44 CN53 HEAT2 P-1 CN52 CN8 PART NAME COMP COMPRESSOR CAP1 FAN MOTOR CAPACITOR EEV ELECTRIC EXPANSIVE VALVE FM1 OUTDOOR DC FAN FAN1
Specifications PCB board of PIAW9170B,PIAW12170B, PCB board of PIAW12180B Page 11
PCB board of PIAW18180B, PIAW24180B, Specifications Page 12
Specifications PCB board of PIAW30180B, PIAW36180B Page 13
IPM board Specifications After power on, LED3(Green color) and LED2(Red color) will be flash if the unit has some problems。 No. Problems LED3(Green) LED3(Red) 1 standby for normal ON OFF 2 Operation normally OFF ON 3 IPM malfunction or IGBT over-strong current protection FLASH (2.5Hz) OFF P0 4 Over voltage or too low voltage protection ON ON P1 5 EEPROM parameter error ON FLASH E5 6 Inverter compressor drive error OFF FLASH P4 7 Inverter compressor drive error FLASH (2.
Product Features Contents 1. Operation Modes and Functions.........................................................................16 1.1 Abbreviation.................................................................................................16 1.2 Safety Features.............................................................................................16 1.3 Display Function...........................................................................................16 1.4 Fan Mode............
1. Operation Modes and Functions 1.1 Abbreviation Unit element abbreviations corresponding error code, allowing for emergency use. • When more than one temperature sensor is malfunctioning, the air conditioner ceases operation. Refrigerant leakage detection This function is active only when mode is selected. It will detect if the compressor is being damaged by refrigerant leakage or by compressor overload. This is measured using the coil temperature of evaporator T2 when the compressor is in operation.
Fan Mode When fan mode is activated: • The outdoor fan and compressor are stopped. • Temperature control is disabled and no temperature setting is displayed. • When T3> TP3+5 for 5 seconds, the compressor will stop until T3< TP3-3. 1.5.5 When evaporator temperature drops below a configured value, the compressor ceases operations. • The indoor fan speed can be set to high, med, low, or auto. 1.6 • The louver operations are identical to those in cooling mode. 1.6.
1.6.5 Evaporator Temperature Protection When the evaporator temperature exceeds a preset protection value, the compressor stops. 1.7 Auto-mode • In auto mode, the machine selects cooling, heating, or fan-only mode on the basis of ∆T (∆T =T1-Ts). ∆T Running mode ∆T>2℃ Cooling -2℃≤∆T≤2℃ Fan-only ∆T<-2℃ Heating* Heating*: In auto mode, cooling only models run the fan Product Features • The louver operates same as in relevant mode.
• If the unit was in forced cooling mode, it will run in this mode for 30 minutes and turn to auto mode with temperature set to 24°C. • If there is a power failure while the unit is running, the compressor starts 3 minutes after the unit restarts. If the unit was already off before the power failure, the compressor starts 1 minute after the unit restarts. sets the temperature according to the measurements from the remote control.
Displayed code Product Features T1 Room temperature T2 Indoor coil temperature T3 Outdoor coil temperature T4 Ambient temperature T2b Outlet temperature of indoor coil TP Discharge temperature TH Suction temperature FT Targeted frequency Fr Actual frequency IF OF Displayed value Explanation Indoor fan speed Meaning Additional Notes 1. All displayed temperatures use actual values. 2. All temperatures are displayed in °C regardless of remote used.
Displayed code Explanation Displayed value Meaning Additional Notes A0 A1 0 1 2 3 4 5 6 Reserved 0-FF - - L Product Features A U T A 5 T Page 21
Maintenance and Disassembly Contents 1. 2. Maintenance.........................................................................................................23 1.1 First Time Installation Check.........................................................................23 1.2 Refrigerant Recharge....................................................................................25 1.3 Re-Installation ..............................................................................................26 1.3.
1. Maintenance 1.1 First Time Installation Check Air and moisture trapped in the refrigerant system affects the performance of the air conditioner by: • Increasing pressure in the system. • Increasing the operating current. To prevent air and moisture from affecting the air conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be leak tested and evacuated. Leak test (soap water method) • Decreasing the cooling or heating efficiency.
Procedure: 1. (14.5 Psi) after 50 minutes, check for leakage. Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves are closed. 2. Connect the charge hose with the push pin of Handle Lo to the gas service port of the 3-way valve. 3. Connect another charge hose to the vacuum pump. 4. Fully open the Handle Lo manifold valve. 5. Using the vacuum pump, evacuate the system for 30 minutes. • If the pressure successfully reaches -0.1 MPa (14.
1.2 Refrigerant Recharge 2OW[OJ YOJK /TJUUX [TOZ 5[ZJUUX [TOZ :]U ]G_ \GR\K 5VKT -GY YOJK :NXKK ]G_ \GR\K )NKIQ \GR\K 5VKT )NGXMOTM I_ROTJKX 2U .O 56+4 )259+ Prior to recharging the refrigerant, confirm the additional amount of refrigerant required using the following table: Models Standard length Max. elevation Max. length Additional refrigerant 9k&12k 7.5m (24.6ft) 10m (32.8ft) 25m (82.0ft) 15g/m (0.16oz/ft) 18k 7.5m (24.6ft) 20m (65.6ft) 30m (98.4ft) 15g/m (0.
1.3 Re-Installation 1.3.1 Indoor Unit Collecting the refrigerant into the outdoor unit 5[ZJUUX [TOZ 2OW[OJ YOJK /TJUUX [TOZ :]U ]G_ \GR\K )RUYK -GY YOJK :NXKK ]G_ \GR\K 5VKT )RUYK 2U .O Maintenance and Disassembly )RUYK Procedure: (14.5 Psi). 1. Confirm that the 2- and 3-way valves are opened. 2. Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port. 6. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.
Air purging with vacuum pump 2OW[OJ YOJK /TJUUX [TOZ 5[ZJUUX [TOZ :]U ]G_ \GR\K )RUYK -GY YOJK 3GTOLURJ \GR\K )USVU[TJ SKZKX 6XKYY[XK MG[MK :NXKK ]G_ \GR\K )RUYK 36G 2U .O .GTJRK 2U )NGXMK NUYK .GTJRK .O )NGXMK NUYK Maintenance and Disassembly
1.3.2 Outdoor Unit Evacuation for the whole system 2OW[OJ YOJK /TJUUX [TOZ 5[ZJUUX [TOZ :]U ]G_ \GR\K 5VKT -GY YOJK :NXKK ]G_ \GR\K 5VKT 56+4 2U .O
Refrigerant charging 2OW[OJ YOJK /TJUUX [TOZ 5[ZJUUX [TOZ :]U ]G_ \GR\K 5VKT -GY YOJK :NXKK ]G_ \GR\K )NKIQ \GR\K 5VKT )NGXMOTM I_ROTJKX 2U .O 56+4 )259+ Procedure: 1. Tighten the flare nuts of the indoor and outdoor units, and confirm that both the 2- and 3-way valves are closed. 7. 2. Slightly connect the Handle Lo charge hose to the 3-way service port. Fully open the Handle Lo manifold valve, 2- and 3-way valves. 8. 3.
2. Disassembly 2.1 1. Indoor unit Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it (see CJ_AB_ INV_001). Front Panel Tab Maintenance and Disassembly CJ_AB_INV_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_AB_ INV_002). Filter CJ_AB_INV_002 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AB_INV_003). Horizontal Louver Hook Maintenance and Disassembly CJ_AB_INV_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AB_INV_004). Hook CJ_AB_INV_004 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towards left, then remove it. (see CJ_AB_INV_005). CJ_AB_INV_005 Maintenance and Disassembly 6) Disconnect the connector for display board. (see CJ_AB_INV_006) . CJ_AB_INV_006 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 7) Slid the front panel side to side to release each axis (see CJ_AB_INV_007) Maintenance and Disassembly CJ_AB_INV_007 8) Open the screw cap and then remove the 3 screws (see CJ_AB_INV_008). CJ_AB_INV_008 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 9) Release the hooks with hands. (see CJ_AB_INV_009) CJ_AB_INV_009 10)Release the 5 hooks in the back (see CJ_AB_INV_010). Maintenance and Disassembly Hooks CJ_AB_INV_010 11)Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see CJ_AB_INV_011) Panel Frame CJ_AB_INV_011 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 12)Release the 5 hooks of the vertical blades, then pull the vertical blades rightward and remove it (see CJ_AB_ INV_012). Hooks Maintenance and Disassembly CJ_AB_INV_012 13)Remove 1 screw of the display board. (see CJ_AB_INV_013). 14)Rotate the display board in the direction shown in the right picture. (see CJ_AB_INV_013). CJ_AB_INV_013 Note: This section is for reference only. Actual unit appearance may vary.
2. Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB_INV_014). 2) Remove one fixing screw of the electronic control box and two screws used for the ground connection (see CJ_AB_INV_014).
Procedure Illustration 4) Remove the fixed devices of the connectors (see CJ_AB_INV_016). CJ_AB_INV_016 CJ_AF_INV_011-1 Maintenance and Disassembly 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see CJ_AB_INV_017). CJ_AB_INV_017 6) Open the left side plate of electronic control box (see CJ_AB_INV_018). CJ_AB_INV_018 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 7) Open the two clips on the front of the electric box. (see CJ_AB_INV_019) CJ_AB_INV_019 Maintenance and Disassembly 8) Open the upper cover plate of electronic control box (see CJ_AB_ INV_020). CJ_AB_INV_020 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see CJ_AB_INV_021). Maintenance and Disassembly CJ_AB_INV_021 Display board 10)Pull out the electrical main board along the direction indicated in right image to remove it (see CJ_AB_ INV_022). Terminal (1L) Terminal (W) Terminal (S) Pipe Temperature Sensor Room Temperature Sensor CJ_AB_INV_022 Note: This section is for reference only. Actual unit appearance may vary.
3. Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AB_INV_023). Pipe Holder CJ_AB_INV_023 Maintenance and Disassembly Screw 2) Remove the 1 screws on the evaporator located at the fixed plate (see CJ_AB_ INV_024). CJ_AB_INV_024 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 3) Release the hook on the evaporator (see CJ_AB_INV_025). CJ_AB_INV_025 Maintenance and Disassembly 4) Remote the one screw on the evaporator located at the fixed plate (see CJ_AB_ INV_026). CJ_AB_INV_026 5) Pull out the evaporator (see CJ_AB_ INV_027). CJ_AB_INV_027 Note: This section is for reference only. Actual unit appearance may vary.
4. Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_AB_ INV_028). Screws CJ_AB_INV_028 Maintenance and Disassembly 2) Remove the bearing sleeve (see CJ_AB_ INV_029). CJ_AB_INV_029 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 3) Remove the fixing screw (see CJ_AB_ INV_030). 4) Pull out the fan motor and fan assembly from the side. Fixing Screw Maintenance and Disassembly CJ_AB_INV_030 Note: This section is for reference only. Actual unit appearance may vary.
5. Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the stepping motor (see CJ_AB_INV_031). Stepping Motor CJ_AB_INV_031 Maintenance and Disassembly Note: This section is for reference only. Actual unit appearance may vary.
6. Drain Hose Procedure Illustration 1) Rotate the fixed wire clockwise indicated in right image (see CJ_AB_INV_032). CJ_AB_INV_032 Maintenance and Disassembly 2) Pull up the drain hose to remove it (see CJ_AB_INV_033). CJ_AB_INV_033 Note: This section is for reference only. Actual unit appearance may vary.
2.2 1. Outdoor unit Panel Plate PIAW9170B, PIAW12170B, PIAW12180B: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_BA30_INV_001). Maintenance and Disassembly CJ_BA30_INV_001 3) Remove the screws of the top cover and then remove the top cover (3 screws). One of the screws is located underneath the big handle (see CJ_ BA30_INV_002).
Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_BA30_INV_003). Front Panel Maintenance and Disassembly CJ_BA30_INV_003 5) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_BA30_INV_004). CJ_BA30_INV_004 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_BA30_INV_005). Right Panel CJ_BA30_INV_005 Maintenance and Disassembly Note: This section is for reference only. Actual unit appearance may vary.
PIAW18180B : Procedure Illustration 1) Turn off the air conditioner and the power breaker. Maintenance and Disassembly 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_B30_INV_001). CJ_B30_INV_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws). One of the screws is located underneath the big handle (see CJ_ B30_INV_002). CJ_B30_INV_002 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_B30_INV_003). Front Panel CJ_B30_INV_003 Maintenance and Disassembly 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_B30_ INV_004). Water Collecting Cover CJ_B30_INV_004 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_B30_INV_005). Right Panel Maintenance and Disassembly CJ_B30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.
PIAW24180B: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_CA30_INV_001). Maintenance and Disassembly CJ_CA30_INV_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws). One of the screws is located underneath the big handle (see CJ_ CA30_INV_002). CJ_CA30_INV_002 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_INV_003). Front Panel 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_ CA30_INV_004). Maintenance and Disassembly CJ_CA30_INV_003 Water Collecting Cover CJ_CA30_INV_004 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_CA30_INV_005). Maintenance and Disassembly Right Panel CJ_CA30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.
PIAW30180B, PIAW36180B: Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_D30_INV_001). Maintenance and Disassembly Big Handle CJ_D30_INV_001 3) Remove the screws of the top cover and then remove the top cover (4 screws). Two of the screws is located underneath the big handle (see CJ_ D30_INV_002). Top Cover CJ_D30_INV_002 Note: This section is for reference only.
Procedure Illustration 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_D30_ INV_003). Front Right Panel Maintenance and Disassembly CJ_D30_INV_003 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see CJ_D30_INV_004). Front Panel CJ_D30_INV_004 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screw) (see CJ_ D30_INV_005). Water Collecting Cover Maintenance and Disassembly CJ_D30_INV_005 7) Remove the screws of the right panel and then remove the right panel (8 screws) (see CJ_D30_INV_006). Right Panel CJ_D30_INV_006 Note: This section is for reference only. Actual unit appearance may vary.
2. Fan disassembly (Antistatic gloves must be worn when you disassemble the electronic box.) Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. PIAW9170B, PIAW12170B, PIAW12180B, PIAW30180B, PIAW36180B: Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_001). 2) Remove the fan. CJ_ODU_INV_001 D-cut Maintenance and Disassembly 3) Remove the screws of the top cover. (2 screws) (see CJ_ODU_INV_002).
Procedure Illustration 5) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_004). CJ_ODU_INV_004 6) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_005). Maintenance and Disassembly 7) Remove the fan motor. Fan Motor CJ_ODU_INV_005 Note: This section is for reference only. Actual unit appearance may vary.
PIAW18180B, PIAW24180B: Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_006). 2) Remove the fan. D-cut CJ_ODU_INV_006 Maintenance and Disassembly Hook 3) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_INV_007). CJ_ODU_INV_007 Note: This section is for reference only. Actual unit appearance may vary.
Procedure Illustration 4) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_008). CJ_ODU_INV_008 Maintenance and Disassembly 5) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_009). 6) Remove the fan motor. Fan Motor CJ_ODU_INV_009 Note: This section is for reference only. Actual unit appearance may vary.
3. Electrical parts (Antistatic gloves must be worn.) Note: Remove the panel plate and fan assembly (refer to 1. Panel plate and 2. Fan assembly) before disassembling electrical parts. PIAW9170B, PIAW12170B, PIAW12180B, PIAW30180B, PIAW36180B: Procedure Illustration 1) Remove the connector for the compressor (see CJ_ODU_INV_010). 2) Pull out the two blue wires connected with the four way valve (CJ_ODU_ INV_010). 4-Way Valve 3) Pull out connectors of the condenser coil temp.
PIAW18180B, PIAW24180B: Procedure Illustration 4-Way Valve 1) Remove the connector for the compressor (see CJ_ODU_INV_011). 2) Pull out the two blue wires connected with the four way valve (see CJ_ODU_ INV_011). Reactor DR 3) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. sensor(T5) (see CJ_ODU_INV_011). 4) Disconnect the electronic expansion valve wire (see Fig CJ_ODU_INV_011).
4. Sound blanket WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_INV_012). Sound Blanket(top) Sound Blanket(side) Maintenance and Disassembly CJ_ODU_INV_012 Note: This section is for reference only.
5. Four-way valve WARNING: Recover refrigerant from the refrigerant circuit before remove the four-way valve. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling four-way valve. Procedure Illustration 1) Heat up the brazed parts and then detach the the four-way valve and the pipe (see CJ_ODU_INV_013). Maintenance and Disassembly 2) Remove the four-way valve assembly with pliers.
6. Compressor WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling compressor. Procedure Illustration 1) Remove the flange nut of terminal cover and remove the terminal cover (see CJ_ ODU_INV_014). Terminal Cover Maintenance and Disassembly CJ_ODU_INV_014 2) Disconnect the connectors (see CJ_ODU_ INV_015).
Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_INV_016). Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_INV_017). 5) Lift the compressor from the base pan assembly with pliers. Discharge Pipe CJ_ODU_INV_017 Note: This section is for reference only. Actual unit appearance may vary.
Troubleshooting Contents 1. Safety Caution......................................................................................................70 2. General Troubleshooting.....................................................................................71 3. Error Diagnosis and Troubleshooting Without Error Code................................73 3.1 Remote maintenance....................................................................................73 3.2 Field maintenance....................
Contents 5.10 P1(Over voltage or too low voltage protection diagnosis and solution)..........94 5.11 P2(High temperature protection of IPM module diagnosis and solution)........95 5.12 P4(Inverter compressor drive error diagnosis and solution)............................96 5.13 P6(Low pressure protection/High pressure protection(36k)/ High temperature protection of IPM module(<36k)diagnosis and solution)................................................
1. Safety Caution WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. Electrolytic Capacitors For other models, connect discharge resistance (approx.100Ω 40W) or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor. The terminals are located on the bottom surface of the outdoor PCB. Troubleshooting Note: This picture is for reference only. Actual appearances may vary.
2. General Troubleshooting 2.1 Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer lamp may turn on or begin flashing, and an error code will be displayed.
For other errors: The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a temperature reading. Troubleshooting: Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement. If the unit responds, the display board requires replacement.
3. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. 3.1 Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance.
3.
Test method / remedy Unit runs continuously but insufficient cooling(heating) Cool can not change to heat Unit is noisy ☆ ☆ ☆ ☆ Turn the AC later ☆ ☆ ☆ Troubleshooting ☆ Frosting and defrosting frequently SILENCE function is activated(optional function) ☆ Turn the AC later Dirty condenser fins Dirty air filter Broken remote control ☆ Turn off SILENCE function.
Page 76 ☆ Remove them Reconnect the power or press ON/OFF button on remote control to restart Remove the obstacles ☆ Close all the windows and doors Tighten bolts or screws Troubleshooting Check heat load Shipping plates remain attached Interference from cell phone towers and remote boosters The air inlet or outlet of either unit is blocked Bad airproof Loosen hold down bolts and / or screws Heavy load condition Others ☆ ☆ ☆ ☆ ☆
Test method / remedy ☆ ☆ Evaporator (indoor) fan will not start ☆ Condenser (Outdoor) fan will not start ☆ Unit runs, but shortly stops ☆ ☆ Compressor short-cycles due to overload ☆ ☆ Low suction pressure Unit runs continuously but insufficient cooling ☆ Compressor is noisy ☆ ☆ ☆ Troubleshooting ☆ Check resistance with multimeter Compressor and condenser (outdoor) fan will not start Check resistance with multimeter ☆ ☆ Replace the stepping motor ☆ Test voltage ☆ Test continuity of coil &
Page 78 ☆ ☆ ☆ Choose AC of lager capacity or add the number of AC Rectify piping so as not to contact each other or with external plate Remove them ☆ Tighten bolts or screws ☆ Check heat load ☆ Fix feeler bulb ☆ ☆ ☆ Replace valve ☆ ☆ ☆ ☆ ☆ Replace valve ☆ Replace valve ☆ Test compressor efficiency ☆ Replace compressor ☆ ☆ Remove obstruction in air or water flow ☆ Remove obstruction in air or water flow ☆ ☆ Remove obstruction to air flow ☆ ☆ Purge, evacuate and recharge ☆ ☆ ☆
4. Quick Maintenance by Error Code If you do not have the time to test whether specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table.
5. Troubleshooting by Error Code 5.1 5.1.1 Common Check Procedures Temperature Sensor Check Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(Tp) sensor. Measure the resistance value of each winding by using the multi-meter. 5.1.
5.1.3 IPM Continuity Check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal resistance Digital tester (+)Red value (-)Black (+)Red ∞ N P (-)Black ∞ V (Several MΩ) N W W 5.1.4 value U U V Normal resistance Digital tester (Several MΩ) (+)Red Fan Motor Measure the resistance value of each winding by using the tester.
5.2 E0/F4 (EEPROM parameter error) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Faulty indoor PCB • Faulty outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later. Is it still displaying the error code? NO The unit is operating normally. YES If the EEPROM chip is welded on main PCB, replace the main PCB directly. Otherwise, check if the EEPROM chip plugged in main PCB well.
5.3 E1 (Indoor and outdoor unit communication error) Description: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times. Recommended parts to prepare: • Faulty indoor PCB • Faulty outdoor PCB • Faulty reactor Troubleshooting and repair: Power off, then restart the unit after 2 minutes. Does a problem remain? NO The unit is operating normally YES Measure Vs. (Vs is the voltage between S and N of outdoor unit.
Remarks: • Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. • When AC is normal running, the voltage will move alternately between -25V to 25V. • If the outdoor unit has malfunction, the voltage will move alternately with positive value. • While if the indoor unit has malfunction, the voltage will be a certain value.
5.4 E2 (Zero crossing detection error diagnosis and solution) Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection mistake • Faulty PCB Troubleshooting and repair: Check the connections and power supply. Is it normal? NO Correct the connections. Turn on the unit when the power supply is good. YES Troubleshooting Indoor main PCB is defective. Replace indoor main PCB.
5.5 E3/F5(Fan speed is operating outside of the normal range) Description: When the indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure(E3). When the outdoor fan speed registers below 200RPM or over 1500RPM for an extended period of time, the unit will stop and the LED will display the failure(F5).
Index: 1. Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced. • DC motor voltage input and output (voltage: 220-240V~): No. Color Signal Voltage 1 Red Vs/Vm 280V~380V 2 --- --- --- 3 Black GND 0V 4 White Vcc 14-17.5V 5 Yellow Vsp 0~5.
3. Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V(115V power supply), the PCB must has problems and need to be replaced.
5.6 E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Recommended parts to prepare: • Wiring mistake • Faulty sensor • Faulty PCB Troubleshooting and repair: Check the connection between temperature sensor and PCB. Is it properly wired? NO Ensure proper connections. YES Measure the resistance value of the sensor.
5.7 EC (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the beginning 8 minutes after the compressor starts up, if T2
5.8 F0(Overload current protection diagnosis and solution) Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Power supply problems. • System blockage • Faulty PCB • Wiring mistake • Compressor malfunction Troubleshooting and repair: Check the power supply. Is it in working order? NO Stop the unit. YES Check system for blockages. Do any exist? NO Clear the blockage. YES Check the compressor resistance values.
5.9 P0(IPM malfunction or IGBT over-strong current protection diagnosis and solution) Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Recommended parts to prepare: • Wiring mistake • IPM malfunction • Faulty outdoor fan assembly • Compressor malfunction • Faulty outdoor PCB Troubleshooting and repair: For 9K~24K: Check the wiring between PCB and compressor.
For 30K~36K: At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below: Check whether the power voltage is normal.
5.10 P1(Over voltage or too low voltage protection diagnosis and solution) Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply issues • System leakage or blockage • Faulty PCB Troubleshooting and repair: Check the power supply. Is it in working order? NO Turn off the unit. YES Check the connections and wires. Are they in working order? Ensure proper connections or replace the wires.
5.11 P2(High temperature protection of IPM module diagnosis and solution) Description: If the temperature of IPM module is higher than setting value, the LED displays this failure code. Recommended parts to prepare: • Faulty PCB • Connection problems Troubleshooting and repair: Check the fastening screws on the PCB and IPM radiator. Are they fixed tightly? YES Replace the outdoor control PCB. NO Troubleshooting Tighten the screws and apply silicon grease.
5.12 P4(Inverter compressor drive error diagnosis and solution) Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Recommended parts to prepare: • Wiring mistake • IPM malfunction • Faulty outdoor fan assembly • Compressor malfunction • Faulty outdoor PCB Troubleshooting and repair: For 12K~24K: Check the wiring between the PCB and compressor.
For 336K: At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below: Check whether the power voltage is normal.
1.1 P6(Low pressure protection/High pressure protection(36k model)/ High temperature protection of IPM module(<36k models) diagnosis and solution) Description: When the pressure of system reach a certain value, the low pressure protector will switch off. After the pressure resume to normal ,the protection code will disappear.
For 36k: Power Power off, off, then then restart restart the the unit unit after after 22 minutes. minutes. Does Does aa problem problem remain? remain? NO The The unit unit isis operating operating normally normally Power Power on on and and set set cooling cooling mode mode Check Check pressure pressure of of gas gas valve valve IfIf the the pressure pressure isis lower lower than than protection protection pressure(0.14MPa)? pressure(0.
Appendix Contents i) Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K)...101 ii) Temperature Sensor Resistance Value Table for TP (°C --K).............................102 iii) ∆T(°F)=(9∆T(°C))/5...............................................................................................103 iv) Pressure On Service Port....................................................................................
°C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm -20 -4 115.266 20 68 12.6431 60 140 2.35774 100 212 0.62973 -19 -2 108.146 21 70 12.0561 61 142 2.27249 101 214 0.61148 -18 0 101.517 22 72 11.5 62 144 2.19073 102 216 0.59386 -17 1 96.3423 23 73 10.9731 63 145 2.11241 103 217 0.57683 -16 3 89.5865 24 75 10.4736 64 147 2.03732 104 219 0.56038 -15 5 84.219 25 77 10 65 149 1.96532 105 221 0.54448 -14 7 79.311 26 79 9.
ii) Temperature Sensor Resistance Value Table for TP (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm -20 -4 542.7 20 68 68.66 60 140 13.59 100 212 3.702 -19 -2 511.9 21 70 65.62 61 142 13.11 101 214 3.595 -18 0 483 22 72 62.73 62 144 12.65 102 216 3.492 -17 1 455.9 23 73 59.98 63 145 12.21 103 217 3.392 -16 3 430.5 24 75 57.37 64 147 11.79 104 219 3.296 -15 5 406.
iii) ∆T(°F)=(9∆T(°C))/5 °C °F °C °F °C °F °C °F °C °F -5 23 21 69.8 51 123.8 82 179.6 113 235.4 -4 24.8 22 71.6 52 125.6 83 181.4 114 237.2 -3 26.6 23 73.4 53 127.4 84 183.2 115 239 -2 28.4 24 75.2 54 129.2 85 185 116 240.8 -1 30.2 25 77 55 131 86 186.8 117 242.6 0 32 25.5 77.9 56 132.8 87 188.6 118 244.4 0.5 32.9 26 78.8 57 134.6 88 190.4 119 246.2 1 33.8 27 80.6 58 136.4 89 192.2 120 248 1.5 34.7 28 82.4 59 138.
iv) Pressure On Service Port(R410A) Cooling chart: °F(°C) BAR ODT IDT 70/59 0(-17) 5(-15) 15 (9.44) 45 (7.22) 75 (23.89) 85 (29.44) 95 (35) 105 (40.56) 115 (46.11) 120 (48.89) 6.4 6.5 7.3 8.0 8.2 7.8 8.1 8.6 10.1 10.6 BAR 75/63 6.7 6.8 7.9 8.6 8.6 8.3 8.7 9.1 10.7 11.2 BAR 80/67 7.1 7.2 8.5 9.5 9.3 8.9 9.1 9.6 11.2 11.9 BAR 90/73 7.7 7.8 9.6 10.5 10.3 9.5 10.0 10.6 12.4 13.0 0(-17) 5(-15) 15 (9.44) 45 (7.22) 75 (23.89) 85 (29.
Heating chart: °F(°C) ODT IDT 57/53 (13.89/11.67) 47/43 (8.33/6.11) 37/33 (2.78/0.56) 27/23 (-2.78/-5) 17/13 (-8.33/10.56) 0/-2 (-17/-19) -17/-18 (-27/-28) BAR 55 30.3 28.5 25.3 22.8 20.8 18.5 16.5 BAR 65 32.5 30.0 26.6 25.4 23.3 20.5 19.0 BAR 75 33.8 31.5 27.8 26.3 24.9 21.5 20.0 57/53 (13.89/11.67) 47/43 (8.33/6.11) 37/33 (2.78/0.56) 27/23 (-2.78/-5) 17/13 (-8.33/10.
