Gree GWH09AGA-K6DNA1A/I, Service Manual

Page: 61 / 117

58
Installation and Maintenance
Service Manual
NO.
Malfunction
Name
Display Method of
Indoor Unit
A/C status Possible Causes
Dual-8 Code
Display
21
Voltage for DC bus-bar
is too high
PH
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop operation.
1. Measure the voltage of position L and N
on wiring board (XT), if the voltage is higher
than 265VAC, turn on the unit after the supply
voltage is increased to the normal range.
2.If the AC input is normal, measure the
voltage of electrolytic capacitor C on control
panel (AP1), if its normal, there's malfunction
for the circuit, please replace the control panel
(AP1)
22
Voltage of DC bus-bar
is too low
PL
During cooling and drying operation:
compressor will stop while indoor fan will
operate;
During heating operation:
the complete unit will stop
1. Measure the voltage of position L and N
on wiring board (XT), if the voltage is higher
than 150VAC, turn on the unit after the supply
voltage is increased to the normal range.
2.If the AC input is normal, measure the
voltage of electrolytic capacitor C on control
panel (AP1), if its normal, there's malfunction
for the circuit, please replace the control panel
(AP1)
23
Compressor Min
frequence in test state
P0
Showing during min. cooling or min. heating
test
24
Compressor rated
frequence in test state
P1
Showing during nominal cooling or nominal
heating test
25
Compressor maximum
frequence in test state
P2
Showing during max. cooling or max. heating
test
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
sufficient and whether the radiator is inserted
tightly. If its no use, please replace control
panel AP1.