Gree GEH09AA-K6DNA1F Service Manual page 47

Display Method of
Indoor Unit
Malfunction
Dual-8
No.
Name
Code
Display
Desynchro-
33 nizing of
compressor
PFC
34
protection
Outdoor DC
35 fan motor
malfunction
power
36
protection
Indoor unit
and outdoor
37
unit doesnt
match
Failure start-
38
up
Anti-freezing
39 protection for
evaporator
Undefined
40 outdoor unit
error
Malfunction of
phase current
41 detection
circuit for
compressor
Malfunction of
voltage
42
dropping for
DC bus-bar
44
A/C status
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
H7
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
HC
During heating operation, the
complete unit will stop
operation.
Outdoor DC fan motor
L3 malfunction lead to compressor
stop operation,
compressor stop operation and
Outdoor fan motor will stop
L9 30s latter , 3 minutes latter
fan motor and compressor will
restart
compressor and Outdoor fan
LP
motor cant work
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
LC
During heating operation, the
complete unit will stop
operation.
Not the error code. It's the
E2
status code for the operation.
Cool: compressor and outdoor
fan stops operation, while
oE indoor fan operates; Heat:
compressor, outdoor fan and
indoor fan stop operation.
During cooling and drying
operation, compressor will stop
U1 while indoor fan will operate;
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
U3 while indoor fan will operate;
During heating operation, the
complete unit will stop
Possible Causes
Refer to the malfunction
analysis (IPM protection, loss
of synchronism protection and
overcurrent protection of phase
current for compressor.
Replace outdoor control panel AP1
or Reactor
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 doesnt
match
Refer to the malfunction analysis
1. Outdoor ambient temperature
exceeds the operation range of unit
(eg: less than-20oC or more than
60oC for cooling; more than 30oC
for heating);
2. Failure startup of compressor?
3. Are wires of compressor not
connected tightly?
4. Is compressor damaged?
5. Is main board damaged?
Replace outdoor control panel AP1
Supply voltage is unstable
Service Manual
Installation and Maintenance