Gree GEH09AA-K6DNA1F Service Manual page 45

Display Method of
Indoor Unit
Malfunction
Dual-8
No.
Name
Code
Display
Decrease
frequency
18 due to
high air
discharge
Limit/
decrease
19 frequency
due to
antifreezing
Voltage for
20 DC bus-bar
is too high
Voltage of
21 DC bus-bar
is too low
Compressor
Min
22
frequence in
test state
Compressor
rated
23
frequence in
test state
Compressor
maximum
24
frequence in
test state
42
A/C status
All loads operate normally,
while
F9
operation frequency for
compressor is decreased
All loads operate normally,
FH while operation frequency for
compressor is decreased
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
PH
During heating operation, the
complete unit will stop
operation.
During cooling and drying
operation, compressor will stop
PL while indoor fan will operate;
During heating operation, the
complete unit will stop
P0
P1
P2
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
Service Manual
Installation and Maintenance