Gree KW09HQ3D6D Series Service Manual page 49

Display Method of Indoor Unit
Indicator Display (during
Malfunction
blinking, ON 0.5s and OFF
Dual-8
NO.
Name
0.5s)
Code
Display
Operation
Indicator
System is
34 H4
abnormal
IPM
35 H5
protection
Internal motor
36 (fan motor) do H6
not operate
Desynchro-
37 nizing of H7
compressor
PFC
38 HC
protection
Outdoor DC
39 fan motor L3
malfunction
power
40 L9
protection
Indoor unit
and outdoor LP
41 unit doesn't
match
Failure start-
42 LC
up
46
A/C status
Cool Heating
Indicator Indicator
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Internal fan motor, external fan
motor, compressor and electric
heater stop operation,guide
louver stops at present
location.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Outdoor DC fan motor
malfunction lead to compressor
stop operation,
compressor stop operation and
Outdoor fan motor will stop
30s latter , 3 minutes latter
fan motor and compressor will
restart
compressor and Outdoor fan
motor can't work
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
Possible Causes
Refer to the malfunction analysis
(overload, high temperature
resistant)
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
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.
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
Refer to the malfunction analysis
DC fan motor malfunction or
system blocked or the connector
loosed
To protect the electronical
components when detect high
power
Indoor unit and outdoor unit doesn't
match
Replace outdoor control panel AP1
or Reactor
Service Manual
Installation and Maintenance