Gree GWH18AGD-K6DNA1D/I - Page 70

67
Installation and Maintenance
Service Manual
No.
Malfunction
Name
Display Method of Indoor Unit
A/C status Possible Causes
Dual-8
Code
Display
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation
Indicator
Cool
Indicator
Heating
Indicator
26
Compressor
intermediate
frequence in
test state
P3
Showing during middle cooling or
middle heating test
27
Overcurrent
protection of
phase
current for
compressor
P5
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.
28
Charging
malfunction
of capacitor
PU
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Refer to the part three—charging
malfunction analysis of capacitor
29
Malfunction
of module
temperature
sensor circuit
P7
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Replace outdoor control panel AP1
30
Module high
temperature
protection
P8
During cooling operation,
compressor will stop while indoor fan will operate;
During heating operation, the complete unit will
stop
After the complete unit is de-
energized for 20mins, check whether
the thermal grease on IPM Module
of outdoor control panel AP1 is
sufcient and whether the radiator is
inserted tightly. If its no use, please
replace control panel AP1.
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
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.