Gree GWH09AGA-K6DNA1A/I, Service Manual

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59
Installation and Maintenance
Service Manual
NO.
Malfunction
Name
Display Method of
Indoor Unit
A/C status Possible Causes
Dual-8 Code
Display
31
Overload protection for
compressor
H3
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
1. Wiring terminal OVC-COMP is loosened. In
normal state, the resistance for this terminal
should be less than 1ohm.
2.Refer to the malfunction analysis ( discharge
protection, overload)
32 IPM protection H5
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
Refer to the malfunction analysis (IPM
protection, loss of synchronism protection and
overcurrent protection of phase current for
compressor.
33
Malfunction of zero-
cross detection circuit
U8 The complete unit stops
1.Power supply is abnormal;
2.Detection circuit of indoor control mainboard
is abnormal.
34
Internal motor (fan
motor) do not operate
H6
Internal fan motor, external fan motor,
compressor and electric heater stop
operation,guide louver stops at present
location.
1. Bad contact of DC motor feedback terminal.
2. Bad contact of DC motor control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev detecting
circuit.
35
Desynchro-nizing of
compressor
H7
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
Refer to the malfunction analysis (IPM
protection, loss of synchronism protection and
overcurrent protection of phase current for
compressor.
36
Outdoor DC fan motor
malfunction
L3
Outdoor DC fan motor malfunction lead to
compressor stop operation,
DC fan motor malfunction or system blocked or
the connector loosed
37 power protection L9
compressor stop operation and Outdoor
fan motor will stop 30s latter , 3 minutes
latter fan motor and compressor will restart
To protect the electronical components when
detect high power
38
Indoor unit and outdoor
unit doesnt match
LP
compressor and Outdoor fan motor can't
work
Indoor unit and outdoor unit doesnt match
39 Failure start-up LC
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
Refer to the malfunction analysis
40 Defrosting
Heating indicator off for
0.5s and then blinks for
10s
Not the error code. It’s the status code for
the operation
41 PFC protection HC
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
Replace outdoor control panel AP1 or Reactor