Haier AU052FPERA User Manual

SYJS-01-2017 REV.A Edition: 2017-01
Service Manual
MRV S
II
(4-6HP)

Haier AU052FPERA Specifications

General

Technology	Inverter
Cooling Capacity	5.2 kW
Heating Capacity	5.6 kW
Refrigerant	R32
Type	Split
Power Supply	220-240V, 50Hz

Summary

2. Specification

6. Capacity Calculation Due to Capacity Modification Coefficient

9. Outdoor Piping Installation

9.1 Safety

Provides critical safety precautions for outdoor piping installation procedures.

9.2 Installation instruction

9.3 Trial operation and the performance

Trial operation

Procedures and checks required before and during the trial operation of the unit.

10. Outdoor Wiring Installation

12. Dip Switch Setting

13. Monitor Tools

14. Outdoor Unit Control

4. Defrosting control

15. Failure code

16. Troubleshooting

[20-23] Temperature sensor failure

Troubleshooting steps for failures related to temperature sensors.

[122] Radiator temp. sensor of transducer abnormal

Troubleshooting for abnormal radiator temperature sensor readings.

[26-0, 26-1, 26-2] Communication circuit between indoor and outdoor

Troubleshooting communication issues between indoor and outdoor units.

[28, 29] High/low pressure sensor failure

Troubleshooting steps for high and low pressure sensor failures.

[30] High pressure switch failure

Troubleshooting procedures for a faulty high-pressure switch.

[34] Protection of discharging temp. too high

Troubleshooting steps for over-temperature protection of the discharging sensor.

[35] 4-way valve reversing failure

Troubleshooting steps for failures related to the 4-way valve reversing function.

[39-0, 39-1] Low pressure too low and compression ratio too high

Troubleshooting for low pressure and high compression ratio issues.

[39-2] Compression ratio too low

Troubleshooting steps for low compression ratio in the compressor.

[40] High pressure too high failure

Troubleshooting for failures resulting in excessively high pressure.

[43] Discharging temp. sensor Td too low protection

Troubleshooting for low temperature protection of the discharging sensor.

[46] Communication with inverter module failure

Troubleshooting communication errors between the inverter module and control PCB.

[53] CT Current too low or current sensor failure

Troubleshooting for low CT current or current sensor failures.

[64] CT current too high

Troubleshooting steps for excessively high CT current.

[71-0,71-1] DC motor blocked

Troubleshooting steps for a blocked DC motor.

[75-0, 75-4] Pressure difference between high pressure and low pressure is abnormal

Troubleshooting for abnormal pressure differences between high and low pressure.

[82, 108, 110, 123] Compressor and IPM Module Protection Issues

Troubleshooting for compressor current protection and IPM module overcurrent faults.

[111] Compressor out of control

Troubleshooting steps when the compressor is out of control.

[118] the compressor start failure

Troubleshooting steps for compressor startup failures.

[112] Radiator temp. of transducer too high; [81] IPM module temp. too high;

Troubleshooting for high temperature issues in radiator and IPM module sensors.

[113] Protection of overload

Troubleshooting steps for overload protection.

[114] Voltage too low of DC bus line of transducer

Troubleshooting for low DC bus line voltage in the transducer.

[115] Voltage too high of DC bus line of transducer

[116] Communication abnormal between transducer (inverter module board) and control PCB

[117] Transducer over current (software protection)

[119] Current detection circuit of transducer is abnormal

[120] Power supply of transducer abnormal

[121] Power supply of inverter board is abnormal