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ACIQ -12-AHB Service Manual

Ducted air handler & condenser
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DUCTED AIR HANDLER & CONDENSER
SERVICE MANUAL
Models Covered:
ACiQ-12-AHB
ACiQ-18-AHB
ACiQ-30-AHB
ACiQ-12-EHPB
ACiQ-18-EHPB
ACiQ-24-EHPB
ACiQ-30-EHPB
ACiQ-36-EHPB
ACiQ-48-EHPB
ACiQ-36-HPC
ACiQ-36-AHB
ACiQ-48-AHB
ACiQ-60-AHB
ACiQ-18-HPB
ACiQ-24-HPB
ACiQ-30-HPB
ACiQ-36-HPB
ACiQ-60-HPB
VERSION DATE: 06-08-24

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Questions and answers

Jerry MaSON
February 9, 2025

what is the model number and mfg specifications including cfm loss of the air handler indoor coil.

0
1 comments:
Mr. Anderson
February 11, 2025

The model number of the air handler indoor coil is ACiQ-12-AHB. The manufacturing specifications include full multi-position installation, allowing for upflow, downflow, horizontal left, or horizontal right configurations. It also features installation convenience, simplifying the airflow volume adjustment process.

For CFM (Cubic Feet per Minute) loss, the airflow rate at different external static pressures is provided:
- High Speed: 1306 to 1706 CFM (depending on static pressure)
- Medium Speed: 1141 to 1541 CFM
- Low Speed: 976 to 1376 CFM

These values indicate the airflow performance under varying conditions.

This answer is automatically generated

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Summary of Contents for ACIQ ACiQ-12-AHB

  • Page 1 DUCTED AIR HANDLER & CONDENSER SERVICE MANUAL Models Covered: ACiQ-12-AHB ACiQ-36-AHB ACiQ-18-AHB ACiQ-48-AHB ACiQ-30-AHB ACiQ-60-AHB ACiQ-12-EHPB ACiQ-18-EHPB ACiQ-18-HPB ACiQ-24-EHPB ACiQ-24-HPB ACiQ-30-EHPB ACiQ-30-HPB ACiQ-36-EHPB ACiQ-36-HPB ACiQ-48-EHPB ACiQ-60-HPB ACiQ-36-HPC VERSION DATE: 06-08-24...
  • Page 3 Table of Contents §. Safety Precautions Precautions Information servicing §. Model Reference & External Appearance Model Reference External Appearance §. Indoor Unit Indoor Unit - Air Handler Type §. Outdoor Unit Dimensional Drawings Service Space Capacity Correction Factor for Height Difference Noise Criterion Curves Refrigerant Cycle Diagrams Electrical Wiring Diagrams...
  • Page 4 Table of Contents §. Troubleshooting Safety Caution General Troubleshooting Outdoor Unit Point Check Function Information Inquiry Error Diagnosis and Troubleshooting Without Error Code Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures §. Indoor Unit Disassembly Indoor Unit - Air Handler Type §.

  • Page 6: Safety Precautions

    Safety Precautions Contents Precautions ......................2 Information servicing(For flammable materials) ..........3...
  • Page 7 ACiQ-12-AHB ACiQ-12-EHPB ACiQ-18-EHPB ACiQ-18-AHB ACiQ-18-HPB ACiQ-24-HPB ACiQ-24-AHB ACiQ-24-EHPB ACiQ-30-EHPB 1Ph, ACiQ-30-AHB 208/230V~, ACiQ-30-HPB 60Hz ACiQ-36-EHPB ACiQ-36-AHB ACiQ-36-HPB ACiQ-36-HPC ACiQ-48-HPB ACiQ-48-AHB ACiQ-48-EHPB ACiQ-60-EHPB ACiQ-60-AHB ACiQ-60-HPB...
  • Page 10 ACiQ...
  • Page 11 12K/18k/24k 30k/36/48k...
  • Page 12 ACiQ-12-AHB & ACiQ-18-AHB...
  • Page 13 ACiQ-24-AHB...
  • Page 14 ACiQ-30-AHB...
  • Page 15 ACiQ-36-AHB...
  • Page 16 ACiQ-48-AHB...
  • Page 17 ACiQ-60-AHB...
  • Page 18 ACiQ-12-AHB & ACiQ-18-AHB ACiQ-24-AHB...
  • Page 19 ACiQ-30-AHB ACiQ-36-AHB ACiQ-60-AHB ACiQ-48-AHB...
  • Page 20 12K/18k...
  • Page 21 ACiQ-36-HPC ACiQ-36-HPB...
  • Page 22 12k~60k...
  • Page 23 ACiQ-12-EHPB ACiQ-18-EHPB ACiQ-18-HPB ACiQ-24-HPB ACiQ-24-EHPB ACiQ-30-EHPB ACiQ-30-HPB ACiQ-36-EHPB ACiQ-36-HPC ACiQ-36-HPB ACiQ-48-HPB ACiQ-48-EHPB ACiQ-60-EHPB ACiQ-60-HPB...
  • Page 24 ACiQ-12-EHPB & ACiQ-18-EHPB ACiQ-24-EHPB...
  • Page 25 ACiQ-30-EHPB ACiQ-36-EHPB ACiQ-48-EHPB ACiQ-60-EHPB...
  • Page 26 ACiQ-18-HPB ACiQ-24-HPB ACiQ-30-HPB ACiQ-36-HPB...
  • Page 27 ACiQ-48-HPB ACiQ-60-HPB ACiQ-36-HPC...
  • Page 28 ACiQ-12-EHPB & ACiQ-18-EHPB...
  • Page 29 ACiQ-24-HPB ACiQ-30-EHPB...
  • Page 30 ACiQ-18-HPB ACiQ-24-EHPB ACiQ-30-HPB ACiQ-36-EHPB ACiQ-48-EHPB ACiQ-60-EHPB...
  • Page 31 ACiQ-36-HPC...
  • Page 32 ACiQ-36-HPB ACiQ-48-HPB...
  • Page 33 ACiQ-60-HPB...
  • Page 34 ACiQ-12-EHPB & ACiQ-18-EHPB ACiQ-18-HPB ACiQ-24-EHPB ACiQ-24-HPB ACiQ-30-HPB ACiQ-30-EHPB ACiQ-36-EHPB ACiQ-36-HPC ACiQ-36-HPB ACiQ-48-HPB ACiQ-60-HPB ACiQ-48-EHPB ACiQ-60-EHPB...
  • Page 35 ACiQ-12-EHPB & ACiQ-18-EHPB ACiQ-18-HPB ACiQ-24-EHPB ACiQ-24-HPB ACiQ-30-HPB ACiQ-30-EHPB ACiQ-36-EHPB ACiQ-36-HPC ACiQ-36-HPB ACiQ-48-HPB ACiQ-48-EHPB ACiQ-60-HPB ACiQ-60-EHPB...
  • Page 36 Outdoor unit printed circuit board diagram: 17122000044714, 17122000048121,17122000046453...
  • Page 37 Name Meaning Earth: connect to Ground N_in: connect to N-line (208-230V AC input) CN1A L_in: connect to L-line (208-230V AC input) CN16 S: connect to indoor unit communication HEAT1 CN17 connect to compressor heater, 208-230V AC when is ON 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON.
  • Page 38 Outdoor unit printed circuit board diagram: 17122000048064& 17122000048066 RC 2 VU B...
  • Page 39 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input) L_in: connect to L-line (208-230V AC input) S: connect to indoor unit communication 4-WAY CN60 connect to 4 way valve, 208-230V AC when is ON. AC-FAN connect to AC fan HEAT2...
  • Page 40 Outdoor unit printed circuit board diagram: 17122000047742...
  • Page 41 Name Meaning CN11 N_in: connect to N-line (208-230V AC input) Power Supply CN12 L_in: connect to L-line (208-230V AC input) EEV-A CN16 EEV-B CN13 EEV-C EEV-D CN15 connect to electric expansion valve EEV-E EEV-F CN17 EEV-G CN14 connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust T3 T4 TP CN26 temp.
  • Page 42 Name Meaning HEAT_D CN20 connect to the heater, 208-230V AC when is ON CN21 HEAT_Y CN36 4-WAY CN38 connect to 4 way valve, 208-230V AC when is ON. CN27 connect to key board CN1 Note: This section is for reference only. Please take practicality as standard.
  • Page 43 Outdoor unit printed circuit board diagram: 17122000037804...
  • Page 44 Name Meaning L1_in: connect to L1-line (230V AC input) Power Supply L2_in: connect to L2-line (230V AC input) Exhaust temp. sensor TP TESTPORT CN35 used for testing HEAT1 CN19/CN20 connect to chassis heater, 208-230V AC when is ON HEAT2 CN24/CN25 connect to compressor heater, 208-230V AC when is ON 4-WAY CN17/CN18...
  • Page 45 Outdoor unit IPM board diagram: 17122000042012...
  • Page 46 Name Meaning connect to main board L-Out Power Supply connect to main board N-Out connect to main board CN6 FAN_DC FAN_1/FAN_2 connect to outdoor DC fan 1& DC fan 2 CN_COMP connect to compressor Note: This section is for reference only. Please take practicality as standard.
  • Page 47 Outdoor unit printed circuit board diagram: 17122300007152...
  • Page 48 Name Meaning COMPRESSOR connect to compressor; 0V AC (standby); 10-310V AC (running) DC-FAN CN32 connect to DC fan TESTPORT CN45 used for testing HEAT_Y CN38 connect to compressor heater, 208-230V AC when is ON CN37 connect to 4 way valve 1, 208-230V AC when is ON. 4-WAY CN25 connect to 4 way valve 2, 208-230V AC when is ON.
  • Page 49 Name Meaning EEVA CN17 EEVB CN16 EEVC CN22 EEVD CN14 EEVE CN13 connect to electric expansion valve EEVF EEV1 CN53 EEV2 CN44 EEV3 H_YL CN49 connect to high pressure sensor Note: This section is for reference only. Please take practicality as standard.
  • Page 50 Outdoor unit printed circuit board diagram: 17122000054047...
  • Page 51 Name Meaning connect to one-way solenoid valve connect to pressure sensor (5VDC) CN28 connect to electric expansion valve (12VDC) TESTPORT CN45 used for testing (5VDC) connect to suction temp. sensor, cold plate temp. sensor CN11 (5VDC) H-PRO CN38 connect to high pressure switch (5VDC) connect to main board L-Out Power Supply connect to main board N-Out...

  • Page 52: Table Of Contents

    Installation Contents Installation Overview Location Selection Indoor Unit Installation Outdoor Unit Installation Drainage Pipe Installation Refrigerant Pipe Installation Vacuum Drying and Leakage Checking Additional Refrigerant Charge Engineering of Insulation Engineering of Electrical Wiring Test Operation...

  • Page 53: Installation Overview

    1. Installation Overview Indoor Unit Indoor Unit Install the indoor unit Install the outdoor unit Install the drainpipe Evacuate the refrigeration system Connect the wires Connect the refrigerant pipes Install the panel Perform a test run (only for cassette type) ...

  • Page 54: Location Selection

    DO NOT install the rows of series like following figure. 2. Location selection 2.1 Unit location selection can refer to installation manual. 2.2 DO NOT install the unit in the following locations: • Where oil drilling or fracking is taking place. •...

  • Page 55: Indoor Unit Installation

    3. Indoor Unit Installation(AHU) Horizontal installation 3.1 Service space for indoor unit Horizontal installation Plenum Clearances: 24inch(min) MINIMUM CLEARANCE OF 25.4mm/1″ALL SIDES 3.2 Install the main body FLEXIBLE The unit may be installed in one of the upflow, downflow, DUCT COLLAR horizontal left or horizontal right orientations.

  • Page 56: Horizontal Left

    For the Horizontal left installation and vertical down installation, the direction of the evaporator should be changed and the drain pan should be removed first. Please do it according to the following steps: 1. Remove the fixed plate of the filter ,then take the filter off.
  • Page 57 4. Unplug temperature sensors T1,T2,T2A,T2B and electronic expansion valve(EEV) from the control board. T1: Room temperature sensor T2: Evaporator central temperature sensor T2A: Evaporator input temperature sensor(only available for some models) T2B: Evaporator output temperature sensor(only available for some models) 7.
  • Page 58 Cut the foam gasket. Remove knockouts as 11. Reinstall evaporator cover plate. shown in the figure. Hook the wire into the buckle and go down from the wire slot. 12. Connect the wire according to the wiring diagram. Replace foam gaster over wires. 13.
  • Page 59 Installation must be performed by an authorized dealer or specialist. Please make necessary protection when installing the unit. Specification series of electric auxiliary heat module: 3kW,5kW,8kW,10kW, 15kw, 20kW,25kW. The electric auxiliary heat module is only used for installation on the AHU internal machine. If the unit needs to be equipped with electric auxiliary heat module, please check the electric auxiliary heat module specification that can be matched with the unit first to...
  • Page 60 3. Install the electric auxiliary heating assembly into the chassis shell from the front, and note that the front end needs to be inserted into the shell assembly hole. 4. Tighten the mounting screws. screws 2. Remove the terminal block and power cord, loosen the screws, and remove the electric auxiliary heating cover.
  • Page 61 9. After installing the electric auxiliary heat module, apply the circuit breaker label near the silicone breaker cover that was just applied. After the electric heating wiring is connected, please confirm before power on: • Check all wiring and ensure reliable connection of wire body.
  • Page 62 Auxiliary Heater Electrical Data CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 Internal Heater part Heater Circuit Heater Heater Heater MOCP MOCP MOCP Protection MCA (1) MCA (1) MCA (1) Amps Amps Amps EAH- Ckt Bkr 10.8/12.0 14.0/16.0 15.0/20.0 03B(UL) EAH- Ckt Bkr 18.0/20.0 23.0/27.0 25.0/30.0...

  • Page 63: Outdoor Unit Installation

    4. Outdoor unit installation 2. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating 4.1 Service space for outdoor unit mode. 4.3 Bolt pitch Panel Plate Unit 4.2 Install drain joint(Heat pump unit only) inch 11.93 17.80...
  • Page 64 4.4 Install Outdoor Unit Fix the outdoor unit with anchor bolts(M10) >60cm / 23.6” Fix with bolts Caution Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling. Never hold the inlet of the outdoor unit to prevent it from deforming.

  • Page 65: Drainage Pipe Installation

    For Vertical drainage pipe (The following table is for 5. Drainage Pipe Installation reference) Install the drainage pipe as shown below and take Reference measures against condensation. Improperly installation Allowable value of inner could lead to leakage and eventually wet furniture and maximum water Remark pipe...
  • Page 66 5.3 Insulation work of drainage pipe Refer the introduction to the insulation engineering parts. • The correct installation will not cause converse water flow and the slope of the branch pipes can be adjusted freely • The false installation will cause converse water flow and the slope of the branch pipe can not be ad- justed.

  • Page 67: Refrigerant Pipe Installation

    2.Confirm the cross way of the pipes. 6. Refrigerant Pipe Installation 3.Measure the necessary pipe length. 6.1 Maximum length and drop height 4.Cut the selected pipe with pipe cutter Ensure that the length of the refrigerant pipe, the number • Make the section flat and smooth.

  • Page 68: Vacuum Drying And Leakage Checking

    7. Vacuum Drying and Leakage 10. Set the wall conduit Checking 11. Set the supporter for the pipe. 12. Locate the pipe and fix it by supporter 7.1 Purpose of vacuum drying • For horizontal refrigerant pipe, the distance be- •...

  • Page 69: Additional Refrigerant Charge

    4. Rain water might penetrate into pipeline during 8. Additional Refrigerant Charge construction. • After the vacuum drying process is carried out, the additional refrigerant charge process need to be performed. Procedures of special vacuum drying are as follows: • The outdoor unit is factory charged with refrigerant.

  • Page 70: Engineering Of Insulation

    9 . Engineering of Insulation insulation and cause easy aging of the material. 9.2 Insulation of drainage pipe 9.1 Insulation of refrigerant pipe 1. Operational procedure of refrigerant pipe 1. Operational procedure of refrigerant pipe insulation insulation Select the suitable pipe → insulation (except joint section) Cut the suitable pipe →...
  • Page 71 2. Specific wiring method Engineering of Electrical Wring Connection method A: 1. Highlights of electrical wiring installation Refer to the wiring method of internal and external • All field wiring construction should be finished by machine communication and wired controller as follows: qualified electrician.
  • Page 72 • Wiring for 3H and 1C thermostat • Wiring for 2H and 1C thermostat S4-1 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages. S4-2 Default on ， DH function off. S4-1 Default on, W1 and W2 Turn switch off to activate DH shorted for single stage Aux heat function.

  • Page 73: Engineering Of Electrical Wiring

    signal of DH changes to 0V, the cooling system starts the dehumidification operation, and the air volume drops to 80% of the nominal cooling air volume. 3.5 UV, fresh air or negative ion wiring The WORK port is linked with the fan. When the fan is running, the relay is closed;...

  • Page 74: Test Operation

    b. Turn on the main power switch and run the air 11. Test Operation conditioner in COOL mode. 1. The test operation must be carried c. Check to see that the water is discharged. It may out after the entire installation has been take up to one minute before the unit begins to drain completed.

  • Page 75: Maintenance

    Maintenance Contents First Time Installation Check .................2 Refrigerant Recharge ....................4 Re-Installation .......................5 Indoor Unit ....................5 Outdoor Unit ....................7...

  • Page 76: First Time Installation Check

    1. First Time Installation Check Air and moisture trapped in the refrigerant system affects To prevent air and moisture from affecting the air the performance of the air conditioner by: conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be •...
  • Page 77 Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations. are closed.

  • Page 78: Refrigerant Recharge

    2. Refrigerant Recharge mA A Procedure: Close both 2- and 3-way valves. 3-way valves. Slightly connect the Handle Lo charge hose to the Operate the air conditioner in cooling mode to charge 3-way service port. the system with liquid refrigerant. Connect the charge hose to the valve at the bottom When the electronic scale displays the correct of the cylinder.

  • Page 79: Re-Installation

    3. Re-Installation Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi). Connect the charge hose with the push pin of Handle Lo to the 3-way valve’s gas service port.
  • Page 80 Air purging with vacuum pump Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way valves cease vacuum pump operations.

  • Page 81: Outdoor Unit

    Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump. If Connect the vacuum pump to the 3-way valve’s the gauge needle moves backward, check whether service port.

  • Page 82: Refrigerant Charging

    Refrigerant charging mA A Procedure: Close both 2- and 3-way valves. Fully open the Handle Lo manifold valve, 2- and 3-way valves. Slightly connect the Handle Lo charge hose to the 3-way service port. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant.
  • Page 83 Product Features Contents Display Function ....................2 Safety Features ......................3 Basic Functions .......................3 Abbreviation ....................3 Fan Mode ......................3 Cooling Mode ....................3 Heating Mode(Heat Pump Units) ..............4 Auto Mode ....................5 Drying Mode ....................6 Forced Operation Function ................6 Timer Function ....................6 Sleep Function ....................6 3.10 Auto-Restart Function ..................6 Remote Controller Functions ................7 LCD Wired Remote Controller ...............7...

  • Page 84: Display Function

    1. Display Function Mode Priority Y/Y2 W W1 W2 E/AUX DH/DS/BK Display Shut down Cooling 1 Cooling 2 Drying 1 Drying 2 Heating 1 Heating 2 Heating 2 Electric heating 1 Electric heating 1 Electric heating 2 Heating 1+Electric heating 1 Heating 1+Electric heating 1 Heating 2 +Electric heating 1 Heating 2 +Electric heating 1...

  • Page 85: Safety Features

    2. Safety Features Fan Mode Compressor three-minute delay at restart When fan mode is activated: • The outdoor fan and compressor are stopped. Compressor functions are delayed for up to ten seconds upon the first startup of the unit, and are delayed for up •...

  • Page 86: Heating Mode(Heat Pump Units)

    • When T1-Tsc is lower than or equal to 0.5°C/0.9°F, • Hold: Keep the current frequency. fan speed reduces to low; • Resume: No limitation for frequency. • Rise curve Heating Mode(Heat Pump Units) • When T1-Tsc is higher than 1°C/1.8°F, fan speed increases to medium;...

  • Page 87: Outdoor Fan Control

    2) Auto fan action in heating mode: TIME_DEFROST7+30 minutes. • If any one of the following conditions is satisfied, • Rise curve defrosting ends and the machine switches to normal • When T1-Tsc is higher than -1.5°C/-2.7°F, fan speed heating mode: reduces to high;...

  • Page 88: Drying Mode

    cooling, the compressor will keep stopping for certain time is reached, the timer LED switches off and the time and then choose mode according to ∆T. unit running mode remains unchanged. • The timer uses relative time, not clock time Drying Mode Sleep Function •...

  • Page 89: Remote Controller Functions

    4. Remote Controller Functions LCD Wired Remote Controller- KJR-120X/TFBG-E(Standard) i) Buttons and Functions 1. POWER button 6. TIMER button Turn on of turn off the unit. To set timer on and timer off time of one day MODE button 7. FAN SPEED button Used to select the operation mode: Auto / Cooling / Drying / Used to select the fan speed.
  • Page 90 ii) LCD Screen 1 Operation mode indication 8 Sleep mode indication 2 Fan speed indication 9 Electric Auxiliary Heat/Turbo function indication(some models) 3 Temperature display NOTE: AHU models only have turbo functions. 4 Lock indication 10 Left-right swing indication (some models) 5 °C / °F indication 11 Clock display 6 Room temperature indication...
  • Page 91 iii) Installation • Dimensions 20mm 120mm 46mm 60mm 1) Connection • Wire with the indoor unit: 60mm Wiring hole HA HB • 1: Indoor Unit. • 2: Notch the part for the wiring to pass through with a nipper tool. •...
  • Page 92 For some models: The wired controller connects to terminal board, terminal board connects to main control board. Main control board Terminal board CN40 ENC1 HA HB HA HB Wired controller 2) Address setting Unit1 Unit2 Unit16 HA HB HA HB HA HB HA HB Wired controller...

  • Page 93: Centralized Controller

    Centralized Controller 1) Connection For Light commercial air conditioner with XYE port, it can be directly connected to Centralized Controller (CCM03, CCM09). 2) Address setting When setting the address, please make sure the unit is powered off. The address can be set from 0 to 63 by the switch. Turn on the unit, then the address will be effective.
  • Page 94 Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Outdoor Unit Point Check Function ..............7 Information Inquiry ....................9 Error Diagnosis and Troubleshooting Without Error Code .......13 Remote maintenance ...................13 Field maintenance ..................14 Quick Maintenance by Error Code ..............19 Troubleshooting by Error Code ................21 EH 00 / EC 51 (EEPROM parameter error Diagnosis and Solution) ....21 EL 01 (Indoor and outdoor unit communication error Diagnosis and Solution) 22 EH 03 / EC 07 (Fan speed is operating outside of the normal range )/EC 71(Over...

  • Page 95: Troubleshooting

    Troubleshooting Contents 7.13 PC 40(Communication error between outdoor main PCB and IPM board diagnosis and solution) ................34 7.14 PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection)/ PC 46(Compressor speed has been out of control)/PC 49(Compressor overcurrent failure) diagnosis and solution ...........35 7.15 PC 0F(PFC module protection diagnosis and solution) ........37 7.16 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) .38 7.17 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) ...39...

  • Page 96: Safety Caution

    1. Safety Caution WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board. WARNING Electricity remains in capacitors even when the power supply is off.

  • Page 97: General Troubleshooting

    2. General Troubleshooting 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. These error codes are described in the following table: Display Error Information...
  • Page 98 High pressure protection or low pressure protection (for some models) TS31 PC 03 Outdoor unit malfunction TS33 ec 0 Low ambient temperature protection TS40 PC 0L Mismatch between the new and old platforms TS47 FL 09 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.
  • Page 99 Error Display (For Some Outdoor Unit) Display Malfunction or Protection Solution Outdoor EEPROM malfunction TS21 EC 51 EL 01 Indoor / outdoor units communication error TS22 Communication malfunction between adapter board and outdoor main board TS47 EL 16 IPM module protection TS28 PC 00 PC 02...

  • Page 100: Outdoor Unit Point Check Function

    3. Outdoor Unit Point Check Function • A check switch is included on the outdoor PCB. • Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1 is pushed. Number of Display Remark Presses...
  • Page 101 Frequency limit caused by The display value is Bit7 IGBT radiator a hex number. For example, the digital Bit6 Reserved display show 2A, then Bit5 Reserved Bit5=1, Bit3=1, and Frequency limit caused by low Bit4 Bit1=1. temperature of T2.(LH00) Frequency limit caused by Frequency limit symbol Bit3 This means that a...

  • Page 102: Information Inquiry

    4. Information Inquiry • To enter engineer mode, in power-on or standby mode, and in non-locked state, press the key combination “ON/OFF + Air Speed” for 7s: • After entering the engineer mode, the remote control will display icons of “Auto, Cool, Dry, Heat”, and the Battery icon;...
  • Page 103 press "On/Off" for 2s to enter Cooling Or Heating Priority Selector, the code Compressor displayed is “Ch”, press "OK" to send the Query Cooling Or Heating Priority Target Frequency Selector code; press the Up/Down key to select, H indicates that there is heating priority and C indicates cooling priority Press "OK"...
  • Page 104 press "On/Off" for 2s to enter the Heating Temperature Compensation Value Settings, the code displayed is “Ch”, press "OK" to send the Query Heating Temperature Compensation Value code; press the Up/Down key to select the heating temperature compensation value, then press "OK"; and press "On/ Off"...
  • Page 105 Error code of engineer mode Display Error Information EH 00 Indoor unit EEPROM parameter error Indoor / outdoor unit communication error EL 01 Communication malfunction between adapter board and outdoor main board EL 16 EH 03 The indoor fan speed is operating outside of the normal range Outdoor unit EEPROM parameter error EC 51 Condenser coil temperature sensor T3 is in open circuit or has short circuited...

  • Page 106: Error Diagnosis And Troubleshooting Without Error Code

    5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start TS15 - TS16...

  • Page 107: Field Maintenance

    Field maintenance Problem Solution Unit will not start TS17 - TS18 Compressor will not start but fans run TS17 - TS18 Compressor and condenser (outdoor) fan will not start TS17 - TS18 Evaporator (indoor) fan will not start TS17 - TS18 Condenser (Outdoor) fan will not start TS17 - TS18 Unit runs, but shortly stops...
  • Page 108  Troubleshooting 15 ...
  • Page 109 1.Remote Maintenance Others Possible causes of trouble Unit will not start The power switch is on but fans will not start ☆ The temperature on the display board cannot be set Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently ☆...
  • Page 110 2.Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops ☆...
  • Page 111 2.Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...

  • Page 112: Quick Maintenance By Error Code

    6. Quick Maintenance by Error Code If you do not have the time to test which 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. Error Code Part requiring replacement...
  • Page 113 Part requiring EL 16 eh 0b pc 06 pc 08/44/ 49 pc 0a pc 0f replacement Indoor PCB Outdoor PCB Outdoor fan motor T3 Sensor TP Sensor Pressure sensor Reactor Compressor IPM module board Data adapter board High pressure valve assy High pressure protector Low pressure protector Additional refrigerant...

  • Page 114: Troubleshooting By Error Code

    7. Troubleshooting by Error Code EH 00 / EC 51 (EEPROM Parameter Error Diagnosis and Solution) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.

  • Page 115: El 01 (Indoor And Outdoor Unit Communication Error Diagnosis And Solution)

    EL 01 (Indoor and Outdoor Unit Communication Error Diagnosis and Solution) Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Signal wires • Magnet ring • Indoor PCB • Outdoor PCB Troubleshooting and repair: Power off, then restart the unit 2 minutes later Check whether there’s any interference.

  • Page 116: Eh 03 / Ec 07 (Fan Speed Is Operating Outside Of The Normal Range )/Ec

    EH 03 / EC 07 (Fan Speed Is Operating Outside of Normal Range)/EC 71(Over Current Failure of Outdoor DC Fan Motor)/ EC73(Zero-speed failure of outdoor DC fan motor) Diagnosis and Solution Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the unit ceases operation and the LED displays the failure.
  • Page 117 Index: 1. Indoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1&pin2 of CN15, pin3 of CN34 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.

  • Page 118: Eh 60/Eh 61/Ec 53/Ec 52/Ec 54/Ec 56/Ec 57/Ec 50/Ec 5C

    EH 60/EH 61/EH 62/ EH 65/ EC 53/EC 52/EC 54/EC 56/EC 57/EC 50/EC 5C (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 displays the failure. Recommended parts to prepare: •...

  • Page 119: El 0C (Refrigerant Leakage Detection Diagnosis And Solution)

    EL 0C (Refrigerant Leakage Detection Diagnosis and Solution) Description: Judging the abnormality of the refrigeration system according to the number of compressor stops and the changes in operating parameters caused by excessive exhaust temperature. Recommended parts to prepare: • Indoor PCB •...

  • Page 120: Eh 0E(Water-Level Alarm Malfunction Diagnosis And Solution)

    EH 0E(Water-Level Alarm Malfunction Diagnosis and Solution) Description: If the sampling voltage is not 5V, the LED displays the failure code. Recommended parts to prepare: • Connection wires • Water-level switch • Indoor PCB Power off, then restart the unit 2 minutes later.

  • Page 121: Pc 00(Ipm Malfunction Or Igbt Over-Strong Current Protection Diagnosis And Solution)

    PC 00(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 “PC 00” and the AC turn off. Recommended parts to prepare: •...

  • Page 122: Pc 01(Over Voltage Or Too Low Voltage Protection)/Pc

    PC 01(Over voltage or too low voltage protection)/PC 10(Outdoor unit low AC voltage protection)/PC 11(Outdoor unit main control board DC bus high voltage protection)/PC 12(Outdoor unit main control board DC bus high voltage protection /341 MCE error) Diagnosis and Solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.

  • Page 123: Pc 04(Inverter Compressor Drive Error Diagnosis And Solution)

    PC 04(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: • Connection wires •...

  • Page 124: Pc 03/Pc 31(Low Pressure Protection Diagnosis And Solution)

    7.10 PC 03/PC 31(Low Pressure Protection Diagnosis and Solution) Description: If the sampling voltage is not 5V, the LED displays a failure code. Recommended parts to prepare: • Connection wires • Low pressure protector • Indoor fan assembly • Outdoor PCB Troubleshooting and repair: Low pressure protection Low pressure protection...

  • Page 125: Protection Of Ipm Module Diagnosis And Solution)

    7.11 PC 02/LC 06(Top temperature protection of compressor or High temperature protection of IPM module diagnosis and solution) Description: For some models with overload protector, If the sampling voltage is not 5V, the LED will display the failure. If the temperature of IPM module is higher than a certain value, the LED displays the failure code. Models without overload protector should be diagnosed according to the second flowchart.

  • Page 126: Ec 0D(Outdoor Unit Malfunction Diagnosis And Solution)

    Check the fastening screws on the PCB and IPM radiator. Replace the outdoor Are they fixed tightly? control PCB. Tighten the screws and apply silicon grease. 7.12 EC 0d(Outdoor unit malfunction Diagnosis and Solution) Description: The indoor unit detect the outdoor unit is error. Recommended parts to prepare: •...

  • Page 127: Pc 40(Communication Error Between Outdoor Main Pcb And Ipm Board Diagnosis And Solution)

    7.13 PC 40(Communication error between outdoor main PCB and IPM board diagnosis and solution) Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: • Connection wires • IPM board • Outdoor main PCB • Electric control box Troubleshooting and repair: Is there at least one LED in the compressor driven chip light?

  • Page 128: Pc 08(Current Overload Protection)/Pc 44(Outdoor Unit Zero Speed Protection)

    7.14 PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection)/ PC 46(Compressor speed has been out of control)/PC 49(Compressor overcurrent failure) diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: •...
  • Page 129 Was the protection activated in standby? Is the power voltage is Restart the unit when the power normal? supply returns to normal Is outdoor terminal voltage Is the power wiring Reconnect the normal？ wired correctly? power wiring Is the voltage between L and Are L and N wired Reconnect L and N N is normal？...

  • Page 130: Pc 0F(Pfc Module Protection Diagnosis And Solution)

    7.15 PC 0F PFC module protection diagnosis and solution) Description: When the voltage signal that IPM send to compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. Recommended parts to prepare: • Connection wires •...

  • Page 131: Ec 72 (Lack Phase Failure Of Outdoor Dc Fan Motor Diagnosis And Solution)

    7.16 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) Description: When the three-phase sampling current of the DC motor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code. Recommended parts to prepare: •...

  • Page 132: Pc 43 (Outdoor Compressor Lack Phase Protection Diagnosis And Solution)

    7.17 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code Recommended parts to prepare: •...

  • Page 133: Pc 45 (Outdoor Unit Ir Chip Drive Failure Diagnosis And Solution)

    7.18 PC 45 (Outdoor unit IR chip drive failure) diagnosis and solution Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on. Recommended parts to prepare: • Inverter module PCB. Troubleshooting and repair: Power off,then restart the unit 2 minutes later.

  • Page 134: Ec55 (Outdoor Ipm Module Temperature Sensor Fault) Diagnosis And Solution

    7.20 EC55 (Outdoor IPM module temperature sensor fault) diagnosis and solution Description: If the sampling voltage is 0V or 5V, the LED displays the failure code. Recommended parts to prepare: • IPM module PCB • Connection wires • Sensors • Outdoor main PCB Troubleshooting and repair: If the radiator has no sensor, follow the steps below to resolve, Power off, then restart the unit after 2 minutes.

  • Page 135: Pc 03/Pc 30 (High Pressure Protection Diagnosis And Solution)

    7.21 PC 03/PC 30 (High pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa Recommended parts to prepare: • Connection wires • Pressure switch • Outdoor fan • Outdoor main PCB Troubleshooting and repair: ...
  • Page 136 High pressure protection High pressure protection Are the high pressure switch Are the high pressure switch Connect high pressure switch and Connect high pressure switch and and main control boar wired and main control boar wired mian control board mian control board correctly? correctly? Is the high pressure...

  • Page 137: Pc 0A (High Temperature Protection Of Condenser Diagnosis And Solution)

    7.22 PC 0A (High temperature protection of condenser diagnosis and solution) Description: When the outdoor pipe temperature is more than 65°C, the unit stops. It starts again only when the outdoor pipe temperature is less than 52°C. Recommended parts to prepare: •...

  • Page 138: Pc 06 (Discharge Temperature Protection Of Compressor Diagnosis And Solution)

    7.23 PC 06 (Discharge temperature protection of compressor diagnosis and solution) Description: If the compressor discharge temperature exceeds a certain level for nine seconds, the compressor ceases operation, the LED displays the failure code Recommended parts to prepare: • Connection wires •...

  • Page 139: Eh 0B(Communication Error Between Indoor Two Chips Diagnosis And Solution)

    7.24 EH 0b(Communication error between indoor two chips diagnosis and solution) Description: Indoor PCB main chip does not receive feedback from another chip. Recommended parts to prepare: • Indoor main board • Adapter board Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.

  • Page 140: El 16(Communication Malfunction Between Adapter Board And Outdoor Main Board Diagnosis And Solution)

    7.25 EL 16(Communication malfunction between adapter board and outdoor main board diagnosis and solution) Description: The adapter PCB cannot detect the main control board. Recommended parts to prepare: • Connection wires • Adapter board • Outdoor main PCB Troubleshooting and repair: Power off, then restart the unit after 3 minutes.

  • Page 141: Pc 41(Outdoor Compressor Current Sampling Circuit Failure Diagnosis And Solution)

    7.27 PC 41(Outdoor compressor current sampling circuit failure diagnosis and solution) Description: Three-phase sampling offset voltage error, the static bias voltage is normally 2.5V Recommended parts to prepare: • Outdoor main PCB Troubleshooting and repair: Shut off the power supply and turn it on 2 minutes later.

  • Page 142: Check Procedures

    8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury. 1. Disconnect temperature sensor from PCB (Refer to Chapter 5. Indoor Disassembly and Chapter 6. Outdoor Disassembly). 2.
  • Page 143 Resistance Value ASM135D23UFZ ATM115D43UFZ2 ASN98D22UFZ ATQ360D1UMU Blue-Red Blue-Black 1.75Ω 1.87Ω 1.57Ω 0.37Ω Red-Black ATF235D22UMT Resistance Value ATF250D22UMT ATF310D43UMT KSK103D33UEZ3 ASM98D32UFZ KTF250D22UMT Blue-Red Blue-Black 0.75Ω 0.65Ω 2.13Ω 2.2Ω Red-Black ASN140D21UFZ Resistance Value ASK89D29UEZD KTM240D57UMT KSN140D58UFZ KSN140D21UFZ Blue-Red Blue-Black 1.28Ω 1.99Ω 0.62Ω 1.86Ω...
  • Page 144 KTQ420D1UMU ATN150D30UFZA ATQ420D1SN5A1 Resistance Value KTF310D43UMT KTM240D46UKT2 KTM240D43UKT EAPQ420D1UMUA EAPQ440D1UMUA Blue-Red Blue-Black 0.65Ω 1.03Ω 1.04Ω 0.37Ω Red-Black Note: The picture and the value are only for reference, actual condition and specific value may vary. 8.3 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting.
  • Page 145 Digital tester Resistance value Digital tester Resistance value (+)Red (-)Black (+)Red (-)Black ∞ ∞ (Several MΩ) (Several MΩ) Or test the conductivity of IPM with diode mode. Needle-type Tester Needle-type Tester Normal Value Normal Value Black Black Open-circuit 0.3-0.5V Needle-type Tester Needle-type Tester Normal Value Normal Value...
  • Page 146 8.4 Normal voltage of P and N 208-240V(1-phase) In standby around 310VDC In operation >310VDC 8.5 4-way Valve Check 1. Power on, use a digital tester to measure the voltage, when the unit operates in cooling, it is 0V. When the unit operates in heating, it is about 230VAC.
  • Page 147 WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Disconnect the connector from outdoor PCB. 2. Measure the resistance value of each winding using a multi-meter. 3. Check the resistance value of each winding in the following table. Red Brown Blue Orange Yellow White Color of lead winding Normal Value...
  • Page 148 Indoor Unit Disassembly-Air Handle Contents Indoor Unit Disassembly ..................1 Electrical Parts ....................2 Fan Motor and Fan ..................5 Evaporator .....................7 Electric Auxiliary Heat Module (Optional) ............9...
  • Page 149 1. Indoor Unit Disassembly Electrical Parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove 2 screws of the upper cover Plate assembly and then remove the it. (see CJ_AHU_001) CJ_AHU_001 2) Remove 2 screws and unplug the plugs. (see CJ_AHU_002) 3) Pull out the electric control box subassembly.(see CJ_AHU_002) CJ_AHU_002...
  • Page 150 Procedure Illustration 4) Release 2 fixing screws and 1earthing screw.(see CJ_AHU_003) 5) Unplug the plugs and then remove the main control board subassembly. (see CJ_AHU_003) CJ_AHU_003 6) Release 1 fixing screw of the data transfer module control board to remove it. (see CJ_AHU_004) CJ_AHU_004 Note: This section is for reference only.
  • Page 151 Procedure Illustration 7) Release 2 screws and then remove the transformer. (see CJ_AHU_005) CJ_AHU_005 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 4 ...
  • Page 152 Fan Motor and Fan Procedure Illustration 1) Remove 2 screws of fan assembly (see CJ_AHU_006) CJ_AHU_006 2) Take out the fan assembly (see CJ_ AHU_007) CJ_AHU_007 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 5 ...
  • Page 153 Procedure Illustration 3) Release 3 nuts fixing the fan motor and then take out the fan motor. (see CJ_AHU_008) CJ_AHU_008 4) Release the 1 nut fixing the fan and then take out the fan. (see CJ_AHU_009) CJ_AHU_009 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 154 Evaporator Procedure Illustration 1) Remove the cover plate (see CJ_ AHU_010) CJ_AHU_010 2) Remove 3 screws of cover plate assembly(below) (see CJ_AHU_011) CJ_AHU_011 Note: This section is for reference only. Actual unit appearance may vary.  Indoor Unit Disassembly 7 ...
  • Page 155 Procedure Illustration 3) Take out the evaporator(with water collector assembly). (see CJ_AHU_012) CJ_AHU_012 4) Remove 2 screws of water collector assembly.(see CJ_AHU_013) 4) Release evaporator and the water collector assembly. CJ_AHU_013 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 156 Electric Auxiliary Heat Module (Optional) Procedure Illustration 1) Remove 2 screws of the upper cover Plate assembly and then remove the it. (see CJ_AHU_001) CJ_AHU_001 screws 2) Remove 3 fixing screws. (see CJ_ AHU_014) CJ_AHU_014 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 157 Procedure Illustration 3) Pull out the auxiliary heat module. (see CJ_AHU_015) CJ_AHU_015 4) Pull out the wire connect to the fuse with needle-nose pliers(see CJ_ AHU_016) Note: Qty of EAH-03B&EAH-05B is 1, Qty of EAH-08B&EAH-10B is 2, Qty of EAH-15B is 3, Qty of EAH-20B is 4, Qty of EAH-25B is 5.
  • Page 158 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Outdoor Unit Disassembly ..................3 Panel Plate .....................3 Electrical Parts .....................20 Fan Assembly ....................47 Fan Motor ....................48 Sound Blanket .....................49 Four-way Valve ....................50 Compressor ....................51...

  • Page 159: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board ACiQ-12-EHPB & X330 PCB Board 11 ACiQ-18-EHPB ACiQ-18-HPB X430 PCB Board 3 ACiQ-24-HPB PCB Board 14 ACiQ-24-EHPB X430 PCB Board 3 ACiQ-30-EHPB PCB Board 14 ACiQ-30-HPB...

  • Page 160: Panel Plate

    2. Outdoor Unit Disassembly 2.1 Panel Plate 1. X230/X330 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screws) (see CJ_X230_001). Big Handle CJ_X230_001 Top Cover 3) Remove the screws of the top cover...
  • Page 161 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X230_003). Water Collecting Cover CJ_X230_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X230_004).
  • Page 162 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_X230_005). Right Panel CJ_X230_005 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 5 ...
  • Page 163 2.X430 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw) (see CJ_X430_001). Big Handle CJ_X430_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 164 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X430_003). Water Collecting Cover CJ_X430_003 5) Remove the screws of the front panel and then remove the front panel (7 screws(onoff models) or 9 screws(inverter models) (see CJ_ X430_004).
  • Page 165 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_X430_005). Right Panel CJ_X430_005 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 8 ...
  • Page 166 3. D30 Procedure Illustration 1) Turn off the air conditioner and the Big Handle power breaker. 2) Remove the screws of the big handle and then remove the big handle (2 screws) (see CJ_D30_001). CJ_D30_001 3) Remove the screws of the top cover and then remove the top cover (4 Top Cover screws).
  • Page 167 Procedure Illustration 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_D30_003). Front Right Panel CJ_D30_003 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see CJ_D30_004).
  • Page 168 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ D30_005). Water Collecting Cover CJ_D30_005 7) Remove the screws of the rear net and then remove the rear net (2 screws) CJ_D30_006).
  • Page 169 Procedure Illustration 8) Remove the screws of the right panel and then remove the right panel (8 screws) (see CJ_D30_007). Right Panel CJ_D30_007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 12 ...
  • Page 170 4. X630 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the top cover and then remove the top cover (7 Top Cover screws). (see CJ_X630_001). CJ_X630_001 3) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_X630_002).
  • Page 171 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_X630_003). Front Panel CJ_X630_003 5) Remove the screws of the big handle and then remove the big handle (4 screws) (see CJ_X630_004). Big Handle CJ_X630_004 Note: This section is for reference only.
  • Page 172 Procedure Illustration 6) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws) (see CJ_ X630_005). Water Collecting Cover CJ_X630_005 7) Remove the screws of the rear net and then remove the rear net (4 screws) CJ_X630_006).
  • Page 173 Procedure Illustration 8) Remove the screws of the right panel and then remove the right panel (10 screws) (see CJ_X630_007). Right Panel CJ_X630_007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 16 ...
  • Page 174 4. E30/590 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_E30_001). CJ_E30_001 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 175 Procedure Illustration 1) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_E30_004). CJ_E30_004 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 18 ...
  • Page 176 Procedure Illustration 2) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_E30_005). CJ_E30_005 3) Remove the screws of the right panel and then remove the right panel (10 screws) (see CJ_E30_006). CJ_E30_006 Note: This section is for reference only.

  • Page 177: Electrical Parts

    Electrical parts Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille(refer to 3.1 Panel Plate) before disassembling electrical parts. 1. PCB board 1 Procedure Illustration 1) Remove the screws of the top cover. CJ_ODU_PCB_001- (2 screws) (see 1 ).
  • Page 178 2. PCB board 2 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_002-1 ). (see 4-Way Valve 2) Disconnect the connector for fan CJ_ODU_PCB_002-1 motor from the electronic control CJ_ODU_PCB_002-2 ). board (see 3) Remove the connector for the Reactor CJ_ODU_PCB_002-...
  • Page 179 3. PCB board 3 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 CJ_ODU_PCB_003-1 ). hooks )(see Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 180 4. PCB board 4 Procedure Illustration 1) Remove the screws of the top cover. (1 screws) (see CJ_ODU_PCB_004- 1 ). CJ_ODU_PCB_004-1 2) Unfix the hooks and then open the electronic control box cover (5 hooks) CJ_ODU_PCB_004-2 ). (see CJ_ODU_PCB_004-2 3) Disconnect the connector for fan motor from the IPM board (see ODU_PCB_004-3 ).
  • Page 181 Procedure Illustration 5) Pull out the wire connected with the CJ_ODU_PCB_004-4 ). terminal. (see T3/T4 6) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. CJ_ODU_PCB_004-4 ). sensor(TP) (see 7) Disconnect the electronic expansion CJ_ODU_PCB_004- valve wire (see Fig 4 ).
  • Page 182 5. PCB board 5 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_005-1 ). (see 2) Disconnect the connector for outdoor DC fan from the electronic CJ_ODU_ control board (see PCB_005-2 ). 3) Remove the connector for the CJ_ODU_PCB_005- compressor (see...
  • Page 183 6. PCB board 6 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_006-1 ). (see CJ_ODU_PCB_006-1 2) Remove 8 screws on the electronic control board and then turn over the electronic control board (see CJ_ODU_PCB_006-2 ).
  • Page 184 Procedure Illustration 3) Pull out the two blue wires connected with the four way valve. connect to IPM board PFC Inductor CJ_ODU_PCB_006-3 )(for heat (see T3&T4 Compressor pump models) 4) Pull out connectors of the condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp.
  • Page 185 7. PCB board 7 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_007-1 ). (see CJ_ODU_PCB_007-1 2) Remove 4 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_007-2 ).
  • Page 186 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_007-3 ). 4) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board(see ODU_PCB_007-3 ). CJ_ODU_PCB_007-3 5) Remove two screws and then remove the electronic control box subassembly on partition board CJ_ODU_PCB_007- assembly.
  • Page 187 Procedure Illustration 6) Remove two screws and two connectors and then remove the CJ_ODU_ inverter control board (see PCB_007-5 ). CJ_ODU_PCB_007-5 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 30 ...
  • Page 188 8. PCB board 8 Procedure Illustration 1) Remove 2 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_008-1) 2) Remove 3 screws to disconnect ground wires. (see CJ_ODU_ PCB_008-1) 3) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_008-1) 4) Disconnect the wires between main control board and IPM module board.
  • Page 189 Procedure Illustration 1) Remove 2 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_008-2) 2) Remove 3 screws to disconnect the wires connected to the compressor. (see CJ_ODU_PCB_008-2) 3) Remove 3 screws to remove the radiator.(see CJ_ODU_PCB_008-2) 4) Disconnect the wires between IPM module board and main control board.
  • Page 190 Procedure Illustration 1) Remove the 1 screw and disconnect the wires and then remove the key CJ_ODU_PCB_008-4 )(for board.(see some models) CJ_ODU_PCB_008-4(for some models) Note: This section is for reference only. Actual unit appearance may vary. 9. PCB board 9 Procedure Illustration 2) Remove 3 screws to disconnect the...
  • Page 191 Procedure Illustration 7) Remove 3 screws to disconnect the power supply wires. (see CJ_ODU_ PCB_009-1) 8) Remove 3 screws to disconnect ground wires. (see CJ_ODU_ PCB_009-1) 9) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_009-2) 10) Remove the 4 screws and unfix the 4 hooks and then remove the filter CJ_ODU_PCB_009-2 ) board.(see...
  • Page 192 10. PCB board 10 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_010-1 ). (see CJ_ODU_PCB_010-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_010-2 ).
  • Page 193 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_010-3 ). 4) Remove the 4 screws and then remove the electronic control CJ_ODU_PCB_010-3 ). board(see Note: When replacing the main control board with a new one, pay attention to applying thermal paste on the heat sink. CJ_ODU_PCB_010-3 5) Pull out the connector, remove one screw and then remove the key...
  • Page 194 11. PCB board 11 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_ wire(1 screw). (see PCB_011-1 ). 2) Remove the electronic control CJ_ODU_ box subassembly. (see CJ_ODU_PCB_011-1 PCB_011-2 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured.
  • Page 195 12. PCB board 12 Procedure Illustration 1) Pull out the connectors (see ODU_PCB_012-1 ). 2) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board(see ODU_PCB_012-2 ). CJ_ODU_PCB_012-1 3) Disconnect the wires connected to main control board.
  • Page 196 13. PCB board 13 Procedure Illustration 1) Remove 4 screws unfix the radiator. (see CJ_ODU_PCB_013-1) 2) Remove 3 screws unfix the electronic control box assembly and partition board. (see CJ_ODU_PCB_013-1) 3) Remove 2 screws unfix the electronic control box assembly and terminal board subassembly.
  • Page 197 Procedure Illustration 5) Disconnect the wires connected to main control board. (see CJ_ODU_ PCB_013-3) 6) Remove the 4 screws and then remove the main control board.(see CJ_ODU_PCB_013-3 ) 7) Remove 1 screw to remove the key CJ_ODU_PCB_013-3 ). board .(see CJ_ODU_PCB_013-3 8) Disconnect the wires between filter board and main control board.
  • Page 198 Procedure Illustration 10) Remove the 2 screws and then remove the DR module box CJ_ODU_ subassembly.(see PCB_013-5 )(DR module box subassembly is on the back of the electronic control box assembly)(for some models) CJ_ODU_PCB_013-5(for some models) 11) Remove the 2 screws and then remove the DR module board.(see CJ_ODU_PCB_013-6 )(for some models)
  • Page 199 14. PCB board 14 Procedure Illustration 1) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_ODU_PCB_014-1 ). (see CJ_ODU_PCB_014-1 2) Remove 6 screws on the electronic control board and then remove the electronic control box subassembly. CJ_ODU_PCB_014-2 ).
  • Page 200 Procedure Illustration 3) Pull out the connectors (see ODU_PCB_014-3 ). 4) Remove the 4 screws and then remove the electronic control CJ_ODU_PCB_041-3 ). board(see Note: When replacing the main control board with a new one, pay attention to applying thermal paste on the heat sink. CJ_ODU_PCB_014-3 5) Remove the 1 screw and disconnect the wires and then remove the 24V...
  • Page 201 15. PCB board 15 Procedure Illustration 1) Remove the screws and unfix the hooks, then open the electronic control box cover (7 screws)(see CJ_ODU_PCB_015-1 ). Note:Electric control box cover cannot be removed, so the voltage between P and N cannot be measured. CJ_ODU_PCB_015-1 2) Remove all of connectors (see Fig CJ_ODU_PCB_015-2 ).
  • Page 202 16. PCB board 16 Procedure Illustration 1) Remove the cover of electrical CJ_ODU_PCB_016- control box. (see 1 ). CJ_ODU_PCB_016-1 2) Disconnect the fan motor connector. CJ_ODU_PCB_016-2 ). (see CJ_ODU_PCB_016-2 3) Remove eight fixing screws. 4) Ture over the electronic control CJ_ODU_ box subassembly.
  • Page 203 Procedure Illustration 5) Remove 3 screws and then remove CJ_ODU_PCB_016- the bracket. (see 4 ). 6) Disconnect the connectors from the electronic control board (see CJ_ODU_PCB_016-4 ). 7) Remove 3 screws and then remove the electronic control board.(see CJ_ODU_PCB_016-4 ). CJ_ODU_PCB_016-4 8) Remove the 1 screw and disconnect the wires and then remove the 24V...

  • Page 204: Fan Assembly

    2.3 Fan Assembly Note: Remove the panel plate (refer to 3.1 Panel Plate) before disassembling fan. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ FAN_001-1&2). 2) Remove the fan. CJ_ODU_FAN_001-1 CJ_ODU_FAN_001-2 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 205: Fan Motor

    Fan Motor Note: Remove the panel plate and the connection of fan motor on PCB (refer to 3.1 Panel Plate and 3.2 Electrical parts) before disassembling fan motor. Procedure Illustration 3) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_MOTOR_001). 4) Remove the fan motor.

  • Page 206: Sound Blanket

    Sound blanket Note: Remove the panel plate (refer to 3.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_BLANKET_001). Sound Blanket(top) (Applicable to models with blanket) Sound Blanket(side) (Applicable to models with blanket) CJ_ODU_BLANKET_001 Note: This section is for reference only.

  • Page 207: Four-Way Valve

    Four-way valve (for heat pump models) WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen;...

  • Page 208: Compressor

    2.7 Compressor WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen;...
  • Page 209 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_COMP_003). CJ_ODU_COMP_003 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_COMP_004). Discharge Pipe 5) Lift the compressor from the base pan assembly with pliers.
  • Page 210 Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..2 Temperature Sensor Resistance Value Table for TP (for some units)(°C --K) ..3 iii) Pressure On Service Port ..................4...
  • Page 211 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 212 ii) Temperature Sensor Resistance Value Table for TP(for some units) (°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...
  • Page 213 iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
  • Page 214 Heating chart(R410A): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 65(18.33) 32.5 30.0 26.6 25.4 23.3 20.5 19.0 75(23.89) 33.8 31.5 27.8 26.3 24.9 21.5...
  • Page 215 Cooling chart(R22): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 0.40 0.41 0.46 0.50 0.51 0.49 0.51 0.54 0.63...
  • Page 216 Heating chart(R22): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 18.9 17.8 15.8 14.3 13.0 11.6 10.3 65(18.33) 20.3 18.8 16.6 15.9 14.6 12.8 11.9 75(23.89) 21.1 19.7 17.3 16.4 15.6 13.4...
  • Page 217 Cooling chart(R32): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.3 10.8 75/63 (23.89/17.22) 10.9 11.4 80/67 (26.67/19.44) 11.4 12.1 90/73 (32.22/22.78) 10.7 10.5 10.2 10.8 12.6 13.3 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15)
  • Page 218 Heating chart(R32): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.9 29.1 25.8 23.3 21.2 18.9 16.8 65(18.33) 33.2 30.6 27.1 25.9 23.8 20.9 19.4 75(23.89) 34.5 32.1 28.4 26.8 25.4 21.9...
  • Page 219 System Pressure Table-R22 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -41.091 -41.964 1600 41.748 107.146 21.75 -32.077 -25.739 1650 16.5 239.25 43.029 109.452 -25.177 -13.319 1700 246.5 44.281 111.706 36.25 -19.508 -3.114 1750 17.5 253.75 45.506 113.911 43.5 -14.654 5.623 1800...
  • Page 220 System Pressure Table-R410A Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.623 -60.921 2350 23.5 340.75 38.817 101.871 21.75 -43.327 -45.989 2400 39.68 103.424 -36.992 -34.586 2450 24.5 355.25 40.531 104.956 36.25 -31.795 -25.231 2500 362.5 41.368 106.462 43.5 -27.351 -17.232 2550...
  • Page 221 System Pressure Table-R32 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181 1950 19.5 282.75 30.448 86.806 36.25 -32.15 -25.87 2000 31.431 88.576 43.5 -27.731 -17.916 2050...

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