Gree GWH07AFAXA-K3NNA1A Service Manual page 80

Service Manual
4. ODU Fan Motor can't Operate
Possible causes
Wrong wire connection, or poor
connection
Capacity of the ODU fan motor is
damaged
Power voltage is a little low or high
Motor of outdoor unit is damaged
5. Compressor can't Operate
Possible causes
Wrong wire connection, or poor
connection
Capacity of compressor is
damaged
Power voltage is a little low or high
Coil of compressor is burnt out
Cylinder of compressor is blocked Compressor can't operate
6. Air Conditioner is Leaking
Possible causes
Drain pipe is blocked
Drain pipe is broken
Wrapping is not tight
7. Abnormal Sound and Vibration
Possible causes
When turn on or turn off the unit,
the panel and other parts will
expand and There's abnormal
sound
When turn on or turn off the unit,
There's abnormal sound due
to flow of refrigerant inside air
conditioner
Foreign objects inside the indoor
unit or therere parts touching
together inside the indoor unit
Foreign objects inside the outdoor
unit or therere parts touching
together inside the outdoor unit
Short circuit inside the magnetic
coil
Abnormal shake of compressor
Abnormal sound inside the
compressor
Installation and Maintenance
Discriminating method (air conditioner status)
Check the wiring status according to circuit diagram
Measure the capacity of fan capacitor with an
universal meter and find that the capacity is out of
the deviation range indicated on the nameplate of
fan capacitor.
Use universal meter to measure the power supply
voltage. The voltage is a little high or low
When unit is on, cooling/heating performance is bad
and ODU compressor generates a lot of noise and
heat.
Discriminating method (air conditioner status)
Check the wiring status according to circuit diagram
Measure the capacity o f fan capacitor with an
universal meter and find that the capacity is out of
the deviation range indicated on the nameplate of
fan capacitor.
Use universal meter to measure the power supply
voltage. The voltage is a little high or low
Use universal meter to measure the resistance
between compressor terminals and it's 0
Discriminating method (air conditioner status)
Water leaking from indoor unit
Water leaking from drain pipe
Water leaking from the pipe connection place of
indoor unit
Discriminating method (air conditioner status)
There's the sound of "PAPA"
Water-running sound can be heard
There's abnormal sound fro indoor unit
There's abnormal sound fro outdoor unit
During heating, the way valve has abnormal
electromagnetic sound
Outdoor unit gives out abnormal sound
Abnormal sound inside the compressor
Troubleshooting
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Replace the capacity of fan
Suggest to equip with voltage regulator
Change compressor oil and refrigerant. If no
better, replace the compressor with a new one
Troubleshooting
Connect wires according to wiring diagram to
make sure all wiring terminals are connected
firmly
Replace the compressor capacitor
Suggest to equip with voltage regulator
Repair or replace compressor
Repair or replace compressor
Troubleshooting
Eliminate the foreign objects inside the drain pipe
Replace drain pipe
Wrap it again and bundle it tightly
Troubleshooting
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
Normal phenomenon. Abnormal sound will
disappear after a few minutes.
Remove foreign objects. Adjust all parts position
of indoor unit, tighten screws and stick damping
plaster between connected parts
Remove foreign objects. Adjust all parts position
of outdoor unit, tighten screws and stick damping
plaster between connected parts
Replace magnetic coil
Adjust the support foot mat of compressor, tighten
the bolts
If add too much refrigerant during maintenance,
please reduce refrigerant properly. Replace
compressor for other circumstances.
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