Allied 4DHV Mini-Split Series Service Manual
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Allied 4DHV Mini-Split Series Service Manual

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SERVICE MANUAL
4DHV Mini-Split Series
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
Model Number Identification ........................................2
Specifications - Outdoor Units .....................................3
.....................................................................................7
Inches (MM) .................................................................8
AHRI System Matches ................................................9
Refrigeration Pipe Work ............................................11
Wiring Diagrams ........................................................24
Wireless Remote .......................................................28
508067-01
DWH Wall Mount Single Zone
Air Conditioning Indoor Unit

Table of Contents

4DHV Single Zone Air
Conditioning Outdoor Unit
Connection to Centralized Controller.........................31
Installation Requirements ..........................................34
Electronic Function ....................................................36
Specifications and Operations ...................................37
Indoor and Outdoor Unit Disassembly.......................41
Indoor / Outdoor Unit Error Codes.............................58
Troubleshooting by Error Codes ................................59
Error Codes ...............................................................61
Pressure on Service Port (R-410A) ...........................75
*P508067-01*
Issue 2016
(P) 508067-01
Page 1 of 75

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  • Page 1: Table Of Contents

    SERVICE MANUAL 4DHV Mini-Split Series This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. DWH Wall Mount Single Zone...

  • Page 2: Model Number Identification

    Model Number Identification 4 D HV 1 S 09 S -1 P 4 D HV 1 S 09 S -1 P OUTDOOR SINGLE-ZONE HEAT PUMP UNITS REFRIGERANT TYPE VOLTAGE R410A L = 115V-1 PHASE-60HZ P = 208/230-1 PHASE-60HZ SERIES TYPE D = DUCTLESS MINOR DESIGN SEQUENCE 1 = 1ST REVISION...

  • Page 3: Specifications - Outdoor Units

    Specifications - Outdoor Units Model Number 4DHV1S09S 4DHV1S12S 4DHV1S18S 4DHV1S24S 4DHV1S36S Nominal Size- Tons 0.75 Ambient Cooling 5 - 122 -13 - 122 Temp. Operating Heating 5 - 86 -13 - 86 Range-°F Sound Data 57.5 Charge Furnished 1lb. 14 oz. 2lbs.

  • Page 4: Specifications - Wall Mounted Indoor Units

    Specifications - Wall Mounted Indoor Units Model Number DWH109S4 DWH112S4 DWH118S4 DWH124S4 DWH136S4 Nominal Size- Tons 0.75 60 Hz - 1 Phase 115V 208/230V 115V 208/230V 208/230V 208/230V 208/230V Rated Load 0.06 0.06 0.11 0.37 Amps Electrical Char. Input (W) 35.2 35.2 Output (W)

  • Page 5: Dimensions - Outdoor Units - Inches (Mm)

    Dimensions - Outdoor Units - Inches (MM) 4DHV1S09S 30-5/8 (778) 21-7/8 (556) 19-1/8 (486) (13) 11-7/8 (302) 30-3/8 (772) 2-3/4 2-1/2 SIDE VIEW FRONT VIEW (64) (70) 1/2 (13) DRAIN HOLE (bottom of unit) 11-1/4 11-3/4 (286) (298) 12-5/8 (322) 2-3/8 (60) 3-5/8 (92) BOTTOM VIEW...
  • Page 6 4DHV1S24S 33-5/8 (854) 27-5/8 (702) 21-1/4 (540) 14-1/4 (362) 7-7/8 (13) (200) 33-1/4 (845) SIDE VIEW 2-3/4 FRONT VIEW (70) 1-3/8 (35) 13-1/8 13-3/4 (333) (349) (381) BOTTOM VIEW 2-3/8 (60) 3-5/8 (92) SIDE VIEW 4DHV1S36S DRAIN HOLE (Bottom of unit) 16-3/8 15-7/8 (416)

  • Page 7: Dimensions - Wall Mounted Indoor Units - Inches (Mm)

    Dimensions - Wall Mounted Indoor Units - Inches (MM) TOP VIEW SIDE VIEW FRONT VIEW SIDE VIEW BOTTOM VIEW Size 29-5/8 11-3/8 8-5/8 32-3/4 11-3/4 8-3/4 39-1/8 12-1/2 9-7/8 1118 13-1/4 10-1/4 46-3/4 1187 13-1/2 10-1/4 508067-01 Issue 2016 Page 7 of 75...

  • Page 8: Dimensions - Wall Mounted Indoor Units - Wall Plates - Inches (Mm)

    Dimensions - Wall Mounted Indoor Units - Wall Plates - Inches (MM) DWH109S4 13-3/4 (349) 7 (178) 5-3/8 (102) (136) 1-1/2 (38) Wall-Mount Unit Outline 2 (51) 1-7/8 28-1/2 (724) (48) Left Rear Hole Right Rear Hole 2-1/2 in. (64 mm) 2-1/2 in.

  • Page 9: Ahri System Matches

    DWH124S4 21-3/4 (553) 8-5/8 (219) 11-7/8 6-7/8 (175) (301) 2-1/8 (54) Wall-Mount 1-7/8 Unit Outline (48) 1-7/8 (48) 42-1/2 (1080) Left Rear Hole Right Rear Hole 2-1/2 in. (64 mm) 2-1/2 in. (64 mm) diameter diameter DWH136S4 Indoor unit outline 10-1/8 10-7/8 (257)
  • Page 10 Outdoor Unit 24 (610) Air Inlet (305) (305) (610) (2007) Air Outlet Minimum rear clearance can be 6 inches (152 mm) when mounted on brackets and with no obstructions on the other three sides. Figure 1. Outdoor Unit Clearances - Inches (mm) Multiple Outdoor Units Height of Wall (C)

  • Page 11: Refrigeration Pipe Work

    Indoor Unit Ceiling 6” (152 mm) Minimum Clearance Wall Any Object Wall 5” 5” 59” (127 mm) (127 mm) (1499 mm) Minimum Minimum Minimum SIDE VIEW Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum 96 inches (2438 mm) Recommended Floor FRONT VIEW Figure 3.
  • Page 12 Minimum Line Set Length - 10 ft. (3m) Maximum Line Set OUTDOOR UNIT INDOOR UNIT Length Maximum Line Set Length Maximum Maximum Elevation - Elevation - INDOOR UNIT Outdooor Outdooor Unit BELOW Unit ABOVE Indoor Unit Indoor Unit OUTDOOR UNIT Minimum Line Set Length - 10 ft.

  • Page 13: Outdoor Unit Connections And Line Set Usage

    Outdoor Unit Connections and Line Set Usage Size Catalog Description OUTDOOR UNIT 1/4 in. x 3/8 in. x 25 ft. 90X53 • 1/4 in. x 3/8 in. x 50 ft. X0258 • 1/4 in. x 1/2 in. x 25 ft. 90X52 •...
  • Page 14 COOLING CAPACITY - 09 (115V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 15 COOLING CAPACITY - 09 (208/230V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 16 COOLING CAPACITY - 12 (115V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 17 COOLING CAPACITY - 12 (208/230V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 18 COOLING CAPACITY - 18 (208/230V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 19 COOLING CAPACITY - 24 (208/230V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 20 COOLING CAPACITY - 36 (208/230V) Indoor Temperature - °F (Dry Bulb / Wet Bulb) Outdoor 65°F / 54°F 70°F / 59°F 75°F / 63°F 80°F / 67°F Temperature - °F Total Sensible Total Sensible Total Sensible Total Sensible (Dry Bulb) mBtuh mBtuh mBtuh...
  • Page 21 Air Throw Data - Wall-Mounted Indoor Units DWH109S4 - COOLING DWH109S4 - HEATING 8 ft. 9 in. 8 ft. 9 in. 0.3 ft./sec. 1.6 ft./sec. 1.6 ft./sec. 3.0 ft./sec. 3.2 ft./sec. 1.3 ft./sec. 3.0 ft./sec. 6 ft. 6 in. 6 ft. 6 in. 11.5 ft./sec.

  • Page 22: Power And Communication Wiring For Systems

    Power and Communication Wiring for Systems CAUTION This unit must be properly grounded and protected by a circuit breaker. The ground wire for the unit must not be connected to a gas or water pipe, a lightning conductor or a telephone ground wire. Do not connect power wires to the outdoor unit until all other wiring and piping connections have been completed.
  • Page 23 WARNING Isolate the power supply before accessing unit electrical terminals. Install unit so that unit disconnect is accessible. Follow all local and national codes, as well as this installation instruction, during installation. Do NOT overload electrical circuit, as this may lead to failure and possible fire. Use specified wiring and cable to make electrical connections.

  • Page 24: Wiring Diagrams

    Wiring Diagrams BLACK REAC TOR L N Y/G CN 3CN 1CN 2CN 16 CN 1A OUTDOOR CONTROL BLUE 4-WAY CN 30 CN 29 CN 28 BLACK CN 50 CRANKCASE HEATER HEATER CN 21 CN 7 DC- FAN T3 T4 Figure 8. 9K - 115VAC Outdoor Unit Wiring Diagram BLACK REACTOR L N Y/G...
  • Page 25 BLACK BLUE BLUE BROWN CN 1A OUTDOOR CONTROL BLUE 4-WAY VALVE BLACK CRANKCASE HEATER COMPRESSOR HEATER CN 21 CN 7 OU TDOOR FA N T5 T3 T4 Figure 10. 09K, 12K and 18K - 208/230VAC Outdoor Unit Wiring Diagram BLACK 3 BLUE L1L2 CN 6 CN 7 CN 8 CN 2...
  • Page 26 2016/9/2 V2.0 • • • • • COMPONENT IN DASH LINE IS OPTIONAL OR FIELD WIRING. 4-WAY VALVE Figure 12. 36K 208/230VAC Outdoor Unit Wiring Diagram WIRING DIAGRAM (INDOOR UNIT) FOR REMOTE ON/OF NOTE: COMPONENT IN DASH LINE IS OPTIONAL OR FIELD WIRING MODE REMOTE ON/OFF ON...
  • Page 27 WIRING DIAGRAM (INDOOR UNIT) NOTE: COMPONENT IN DASH LINE IS OPTIONAL V1.2 OR FIELD WIRING 2016/7/7 CN10A DISPLAY BOARD CN2(CN201) OPTIONAL Wired Controller CN1(CN101) CN3(CN301) CN501 ADAPTER BOARD CN403 OPTIONAL FOR SETTING NETADDRESS FOR SETTING NETADDRESS Programmable Wired Controller ENC2+S1 ENC2+S1 1 1 2 2 1 1 2 2...

  • Page 28: Wireless Remote

    Function Specifications Wireless Remote Rated voltage 3.0 VDC (2 AAA batteries) Min voltage for sending signal 2.4 VDC to CPU IMPORTANT Effective transmitting distance 26 feet (8 meters) Frequent changes to operating mode may cause Operation conditions 23°F to 140°F (-5 to 60°C) system malfunction.
  • Page 29 • LED button. Press the LED button to turn on the indoor • Operation mode. These icons show the current mode unit display. Press the button again to turn off the of operation. Press the mode button to scroll through display.
  • Page 30 Select Fahrenheit or Celsius Dry Mode Press and hold the Up and Down buttons at the same 1. Press the Power button. An LED light on the indoor time for three seconds to toggle between Fahrenheit and unit displays. Celsius. 2.

  • Page 31: Connection To Centralized Controller

    Connection to Centralized Controller Set Indoor Unit Address for Centralized Control (Used with VRF Only) All indoor units connected to a centralized controller must have a unique address. Use the S1 dip switch and the S2 dial switch to set the address for each indoor unit. Figure 18 shows how to set the unique addresses. All indoor units are factory set to “0”.
  • Page 32 Indoor Unit Connection Points for Centralized NOTE: In addition, the outdoor units do not have a Controller humidistat installed therefore they are unable to determine humidity levels. This product is not recommend as a main Mini-split indoor units can be connected to a centralized source for dehumidification.
  • Page 33 Ambient Temperature is Below 63°F (17°C) Checks Pass Fail You can’t use the remote controller to turn on the COOL No electrical leakage function when the ambient temperature is below 17°C. In Unit is properly grounded this instance, you can use the MANUAL CONTROL button All electrical terminals properly to test the COOL function.

  • Page 34: Installation Requirements

    Adding Refrigerant if Pipe Length Exceeds Installation Requirements Charge Less Pipe Length Connect the charge hose to the charging cylinder and open the two-way and three-way valves. With the charge Gas Leak Check with Soap Water hose you disconnected from the vacuum pump, connect it Apply soap water or a liquid neutral detergent on the to the valve at the bottom of the cylinder.
  • Page 35 9. Mount the valve stem caps and the service port. Use 7. Fully close the handle Lo valve of the manifold valve torque wrench to tighten the service port cap to a and stop the operation of the vacuum pump. Confirm torque of 18N.m(13.27 ft·lbs).

  • Page 36: Electronic Function

    7. When the electronic scale displays the proper weight, Single-Zone Outdoor Unit LED Locations disconnect the charge hose from the 3- way valve’s service port immediately. Single-zone outdoor units display flash codes on the main 8. If the system has been charged with liquid refrigerant board.

  • Page 37: Specifications And Operations

    Specifications and Operations Indoor ambient temperature Coil temperature of indoor heat exchanger Pipe temperature of outdoor heat exchanger Outdoor ambient temperature Compressor discharge temperature Table 8. Electronic Functions Abbreviations Input voltage: 230V Input power frequency: 60Hz Indoor fan normal working amp. is less than 1A Outdoor fan normal working amp is less than 1.5A Four-way valve normal working amp is less than 1A Table 9.
  • Page 38 ODU(DB) °F(°C) IDU(DB/WB) (-17) (-15) (9.44) (7.22) (23.89) (29.44) (35) (40.56) (46.11) (48.89) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) Table 12. Cooling - Fahrenheit (Celsius) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) ODT / IDT (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5)
  • Page 39 Capacity Request Calculations Total capacity Request=Σ(Norm code × HP) /10× modify rate+ correction. T1 Ts Figure 24. Cooling Mode Capacity Area Norm Code (N) NOTE: The final result is integer. Plus all the indoor capacity request together, then modify it by T4. When there is only one indoor unit: Outdoor Temperature (T4) >29°C...
  • Page 40 Outdoor Fan Control Cooling Mode Normally the system will choose the running fan speed according to ambient temperature: DC_FAN_HI_SPD_ADD 28℃ 26℃ DC_FAN_MID_SPD_ADD 25℃ 23℃ DC_FAN_MIN_SPD_ADD 22℃ 20℃ DC_FAN_SLOW_SPD_ADD 19℃ 17℃ DC_FAN_SSLOW_SPD_ADD When low ambient cooling is valid: High low ambient cooling Outdoor fan speed control logical (low ambient cooling).

  • Page 41: Indoor And Outdoor Unit Disassembly

    Indoor and Outdoor Unit Disassembly NOTE: This section is for reference only. Actual unit 3. Open the horizontal louver and push the hook towards appearance may vary. left to open it. Indoor Unit (All Models) Front Panel 1. Hold the front panel by the tabs on the both sides and lift it.
  • Page 42 5. Pry the electrical cover by a screw driver, and rotate it 8. Open the screw cap and then remove the three screws. towards left, then remove it. 9. Release the hooks with hands. 6. Disconnect the connector for display board. 10.
  • Page 43 11. Pull out the panel frame while pushing the hook Electrical Parts through a clearance between the panel frame and the NOTE: When handling electrical parts use anti-static heat exchanger. gloves. NOTE: Remove the front panel (see Step 1 on page 41) before disassembling electrical parts.
  • Page 44 4. Remove the fixed devices of the connectors. 7. Open the two clips on the front of the electric box. 8. Open the upper cover plate of electronic control box. 5. Disconnect the connectors of fan motor, the step motor and the T2 sensor.
  • Page 45 10. Pull out the electrical main board along the direction indicated in below image to remove it. Terminal S Screw Display Board RoomTemp Sensor Terminal 1L Terminal W Pipe Temp Sensor Evaporator NOTE: Remove the front panel and electrical parts before 3.
  • Page 46 5. Pull out the evaporator. 3. Remove the fixing screw. 4. Pull out the fan motor and fan assembly from the side. Fixing Screw Step Motor Fan Motor and Fan NOTE: Remove the front panel and electrical parts before NOTE: Remove the front panel and electrical parts before disassembling step motor (see both “Front Panel”...
  • Page 47 2. Pull up the drain hose to remove it. 3. Remove the screws of the top cover and then remove top cover. One of the screws is located underneath the big handle. Top Cover Outdoor Unit Panel Plate (4DHV1S09S, 4DHV1S12S and 4DHV1S18S) 1.
  • Page 48 5. Remove the screw from the water collector cover. 7. Remove the screws from the right panel and then remove panel. Water Collection Cover 6. Remove the screws on the rear coil guard and then remove the coil guard. Right Panel Panel Plate (4DHV1S24S) 1.
  • Page 49 3. Remove the screws from the top cover and then 6. Remove the screws securing the right panel cover and remove. One of the screws is located underneath the remove panel. handle. Top Cover Front Cover 4. Remove the screws from the front panel and then remove panel.
  • Page 50 3. Remove the screws of the top cover and then remove 5. Remove the screws of the front panel and then remove the top cover (4 screws). Two of the screws is located the front panel (9 screws). underneath the big handle. Top Cover 4.
  • Page 51 7. Remove the screws of the rear net and then remove 4. Disconnect the expansion valve. the rear net (2 screws). 5. Remove electronic control box. 4-way valve (HP only) Fan Motor Compressor T3, T4 and TP Electronic Components (4DHV1S18S) NOTE: Antistatic gloves must be worn when you disassemble the electronic box.
  • Page 52 Electronic Components (4DHV1S24S) NOTE: Antistatic gloves must be worn when you disassemble the electronic box. NOTE: Remove the panel plate before disassembling the fan. 1. Remove the connector for the compressor. 2. Pull out the two blue wires connected to the expansion value (not applicable to AC units only) 3.
  • Page 53 3. Release the hooks and then open the electronic control 5. Remove the screws securing the fan motor and then box cover. remove fan assembly. Hook Fan Motor Fan Disassembly (4DHV1S18S) 4. Disconnect the connector from the fan motor from the electronic control board.
  • Page 54 3. Disconnect connector from electronic control board Fan Disassembly (4DHV1S24S) plug. NOTE: Antistatic gloves must be worn when you disassemble the electronic box. NOTE: Remove the panel plate before disassembling the fan. 1. Remove the nut security the fan with a spanner. Then remove the fan.
  • Page 55 3. Disconnect the connector for the fan motor from the 2. Release the hooks and then open the electronic control electronic control board. box cover. Fan Motor Connector Hook 4. Remove the screws securing the fan motor from body. Remove the fan. 3.
  • Page 56 4. Remove the screws securing the fan motor from body. Four-Way Valve Remove the fan. WARNING Recover refrigerant from the refrigerant circuit before remove the four-way valve. NOTE: Remove the panel plate, electrical parts, and fan assembly before disassembling four-way valve. 1.
  • Page 57 Compressor 3. Remove the hex nuts and washers which are located on the bottom of the plate which are securing the NOTE: Recover refrigerant before removing compressor. compressor. 1. Remove the flange nut of the terminal cover and remove the cover. Terminal Cover 4.

  • Page 58: Indoor / Outdoor Unit Error Codes

    Indoor / Outdoor Unit Error Codes All indoor units provide error code information with either a digital LED display or with Flash codes. Front Panel Display window Figure 25. Indoor Unit Display Outdoor Outdoor Unit Indoor Unit Page Unit LED Error Information Display Location...

  • Page 59: Troubleshooting By Error Codes

    Troubleshooting by Error Codes Temperature Sensor Check Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors: • Room temperature (T1) sensor, • Indoor coil temperature(T2) sensor, • Outdoor coil temperature (T3) sensor, • Outdoor ambient temperature (T4) sensor, •...
  • Page 60 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 Normal Resistance Digital Tester Digital Tester Value Value...

  • Page 61: Error Codes

    Error Codes Error Code: E0/F4 Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. General Note: Outdoor unit main control board chip is not receiving feedback from EEPROM chip. Shut off the power supply for two minutes.
  • Page 62 Error Code: E1 Description: Communication malfunction between outdoor unit and all indoor units. General Note: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times Power of system, restart after two minutes Does a problem remain? The unit is opera ng normally Measure Vs.
  • Page 63 Error Code: E1 (continued) Remarks: Use a multimeter to test the DC voltage between therminals 2 and 32 on outdoor unit. The mulitimeter red prob connects to terminal 2 and the black prob connects to terminal 3. When AC is running normally, the voltage will move alternately between -25V to 25V. If the oudoor unit malfunctions, the voltage will move alternately with positive values.
  • Page 64 Error Code: E2 Description: Zero crossing detection error diagnosis and solution General Note: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Check the connec ons and power supply. Correct the connec ons.
  • Page 65 Error Code: E3/F5 Description: Fan Speed is Operating Outside of the Normal Range. General Note: When the indoor fan speed is to low (300 RPM) during normal operations, the unit will stop and the LED will display the failure( E3). When the outdoor fan speed registers below 200 RPM or over 1500 RPM for an extended period of time, the unit will stop and the LED will display the failure (F5).
  • Page 66 Error Code: E3/E5 (continued) 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. •...
  • Page 67 Error Codes: E4, E5, F0, F1, F2 and F3 Description: Open circuit or short circuit of temperature sensor diagnosis and solution. General Note: Error displays if voltage is lower than 0.06V or higher than 4.94V. Check the connec on between temperature sensor and PCB.
  • Page 68 Error Code: EC Description: Refrigerant Leakage Detection Diagnosis and Solution General Note: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool. In the beginning eight minutes after the compressor starts up, if T2<Tcool-2°C does not keep continuous four seconds and compressor running frequency higher than 50Hz does not keep continuous three minutes, and this situation happens three times, the display area will show “EC”...
  • Page 69 Error Codes: P0 Description: IPM malfunction or IGBT Over-Current Protection Diagnosis and Solution) General Note: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Check the wiring between PCB and compressor.
  • Page 70 Error Code: P1 Description: Over voltage or too low voltage protection diagnosis and solution) General Note: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Check the power supply. Is it in working order? Turn off...
  • Page 71 Error Code: P2 Description: High Temperature Protection of IPM module Diagnosis and Solution General Note: If the temperature of IPM module is higher than setting value, the LED displays this failure code. Check the fastening screws on the PCB and IPM radiator. Replace the outdoor Are they fixed tightly?
  • Page 72 Error Code: P4 Description: Inverter Compressor Drive Error Diagnosis and Solution General Note: 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. Check the wiring between the PCB and compressor.

  • Page 73: Temperature Sensor Resistance Values

    Temperature Sensor Resistance Values °F °C K Ohm °F °C K Ohm °F °C K Ohm °F °C K Ohm 115.266 12.6431 2.35774 0.62973 -2.2 108.146 69.8 12.0561 141.8 2.27249 213.8 0.61148 -0.4 101.517 71.6 11.5 143.6 2.19073 215.6 0.59386 96.3423 73.4 10.9731...

  • Page 74: Discharge Temperature Sensor Resistance Values

    Discharge Temperature Sensor Resistance Values °F °C K Ohm °F °C K Ohm °F °C K Ohm °F °C K Ohm 542.7 68.66 13.59 3.702 -2.2 511.9 69.8 65.62 141.8 13.11 213.8 3.595 -0.4 455.9 71.6 59.98 143.6 12.21 215.6 3.392 455.9 73.4...

  • Page 75: Pressure On Service Port (R-410A)

    Pressure on Service Port (R-410A) °F(°C) IDT/ODT (-17) (-15) (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.1 10.6 75/63 10.7 11.2 80/67 11.2 11.9 90/73 10.5 10.3 10.6 12.4 °F(°C) IDT/ODT (-17) (-15) (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89)

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