Gree GVH24AK-K3DNC8A Service Manual page 60

Service Manual
4. Diagnosis for Failure Start up Malfunction (Outdoor unit malfunction)
Outdoor unit malfunction indicator status
D5 D6
□ ☆
Main detection point:
●If the compressor wiring is correct?
●If the stop time of compressor is enough?
●If the compressor is damaged?
●If the refrigerant charging is too much?
Malfunction diagnosis process:
Installation and Maintenance
D16 D30
□ ☆
Energize the unit
and start it
If the stop time of compressor
is more than 3min?
Y
If the compressor wire COMP(UVW) is
well connected and connection sequence
is correct
Y
If the refrigerant charging is
too much?
Y
Charge the
refrigerant according
to service manual
Does the unit start
up normally?
N
Replace control board AP1
If malfunction is
removed?
N
Replace the
compressor
End
If the stop time is not enough and the
N
high and low pressure of system is not
balance , please start it after 3min
Improve the connection situation
of control board AP1 and
N
compressor COMP, connect it
with wiring diagram
Does the unit start
up normally?
N
Y
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