Gree GWH09AGA-K6DNA1A Service Manual page 58

Service Manual
Dual-8
Malfunction
No.
Code
Name
Display
Decrease
frequency
19 due to
high air
discharge
Limit/
decrease
20 frequency FH
due to
antifreezing
Voltage for
21 DC bus-bar PH
is too high
Voltage of
22 DC bus-bar PL
is too low
Compressor
Min
23 P0
frequence in
test state
Compressor
rated
24 P1
frequence in
test state
Compressor
maximum
25 P2
frequence in
test state
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Operation Cool Heating
Indicator Indicator Indicator
F9
A/C status
All loads operate normally, while
operation frequency for
compressor is decreased
All loads operate normally, while operation
frequency for compressor is decreased
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
Possible Causes
Overload or temperature is too high;
Refrigerant is insufficient;
Malfunction of electric expansion valve (EKV)
Poor air-return in indoor unit or fan speed is too
low
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, theres malfunction for the circuit, please
replace the control panel (AP1)
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, theres malfunction for the circuit, please
replace the control panel (AP1)
Showing during min. cooling or min. heating test
Showing during nominal cooling or nominal heating
test
Showing during max. cooling or max. heating test
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