Gree GPH12AF-K3NNA7A

33
Maintenance
Service Manual
4
Overcurrent
protection
E5
OFF 3S
and blinks
5 times
(inverter
unit);
running
indicator
blinks (non-
inverter oor
standing
unit); As for
other types
of units,
please
refer to the
detailed
function
equirement.
During cooling and
drying operation,
compressor and
outdoor fan stop while
indoor fan operates.
During heating
operation, all loads
stop.
1. Unstable supply voltage.
Normal uctuation shall
be within 10% of the rated
voltage on the nameplate.
2. Supply voltage is too low
and load is too high.
3. Measure the current of
live wire on main board. If
the current isn’t higher than
the overcurrent protection
value, please check the
controller.
4. The indoor and outdoor
heat exchangers are too
dirty, or the air inlet and air
outlet are blocked.
5. The fan motor is not
running. Abnormal fan
speed: fan speed is too low
or the fan doesn’t run
6. The compressor is not
running normally. There
is abnormal sound, oil
leakage or the temperature
of the shell is too high, etc.
7. There’s blockage in the
system (lth blockage, ice
plug, greasy blockage,
Y-valve hasn’t been opened
completely)
5
Over-blow
protection
H8
Over-blow
indicator
lamp goes
out 3S
blinks 8
times
Refer to th e indication of
instruction to discharge the
water of chassis.
6
Insufcient uorine
protection F0
Indoor fan runs
according to set fan
and other loads will
stop.
Under cool and dry modes,
when main board detects
that uorine is insufcient,
dual-8 digital tube will
display error code F0.
7
Overload
protection H3
Indoor fan runs
according to set fan
and other loads will
stop.
Under cool and dry modes,
when it is detected that
system is overloading,
dual-8 will display error
code H3.