Haier GE APPLIANCES Connect Series, Service Manual

Page: 42 / 102

CONNECT SERIES SERVICE MANUAL
40
ENGLISH
Maintenance
How to Replace the Compressor
Diagnosis of Compressor Failure: On Condition that the Unit CAN be Started Up
1. Start the unit if it will run and check the current of the faulted compressor. Use manifold gauges to
measure the discharge and suction pressures at the service valves. Refer to the following table based on
the recommended working current. The electric current of an inverter compressor will be different under
different rotation speed or different working conditions. If the compressor is working at 60Hz, the working
current corresponding to different condensing temperature and evaporating temperature is shown below:
Inverter compressor QXFT-F310zN450
2. Judge whether the operating noise of the compressor is normal, and whether there is a sharp noise or
obvious scraping. If there is a normal compressor working nearby, compare their operating noises.
3. Examine whether the electronic expansion valve of the outdoor unit is active and whether the 4-way valve
works or not. How to examine:
I. Electronic Expansion Valve:
The electronic expansion valve will be reset every time when the unit is
powered on or off. Touch the valve and you can feel the movement of the
valve spool. In the last stage of the reset process, you will hear the click of
the valve and feel its vibration.
Touch the electronic expansion valve:
a. Touch the top of the electronic expansion valve and you can feel its move
as it is reset upon startup.
b. Make sure the coil is fixed firmly.
II. 4-way Valve:
During normal operation, the 4 copper tubes
that connect to the valve will have different
temperatures. When the 4-way valve is working,
it will generate some noise and vibration.
This is the position of the 4-way
valve. Do not touch it directly
with your hands. There is hot
refrigerant at the
discharge
pipe,
so be careful not to be scalded.
Electronic expansion
This is the position of the 4-way
valve. Do not touch it directly
with your hands. There is hot
refrigerant at the
discharge
pipe,
so be careful not to be scalded.
Electronic expansion