Gree GVH24AK-K3DNC8A - Page 61

Service Manual
58
Installation and Maintenance
5. Diagnosis for Compressor Synchronism (Outdoor unit malfunction)
Outdoor unit malfunction indicator status
Main detection point:
●If the system pressure is over-high?
●If the working voltage is over-low?
Malfunction diagnosis process:
D5 D6 D16 D30
□ ☆ ■ ☆
If the compressor
wire COMP(UVW) is well connected, the
connection sequence forwards to
clockwise direction?
Check if the fan
terminal OFAN is
connected well
Replace
compressor
If the outdoor fan works
normally?
If the stop time of
compressor is more than
3min
End
Synchronism after
energize the unit
and start it
Connect
wire well
Synchronism
occurred during
operation
Replace
control board
AP1
If the radiating of unit is
well?
Remove
malfunction?
Improve the radiating
of unit (clean heat
exchanger and
increase ventilation)
Replace fan
capacitor C1
Replace
outdoor fan
End
Y
N
N
N
Y
Y
N
Replace
control board
AP1
Remove
malfunction?
Replace
compressor
Y
N
N
Y
If the input voltage of unit
is normal?
Start to run until the
power resume normal
voltage
N
If the refrigerant is too
much?
Charge the
refrigerant with
service manual
Y
Y
N
Y