Gree GRH120DB-K6NA1A Service Manual page 34

3. Overload malfunction E8
Troubleshooting
for E8 malfunction
Whether the environment
is formidable
No
Heat exchangers are
too dirty or the air inlet/outlet
is blocked.
No
Fan motor doesn't work at a
normal fan speed; fan speed is too low
or the fan doesn't run
No
Compressor doesn't work
normally. Strange noise or leakage occurs.
Casing is too hot.
No
System is blocked inside
(dirt block, ice block, oil block, Y-valve no
fully open).
No
Temperature sensor of main board
can't detect correctly.
No
Replace a main
board with the
same model.
End
32
Operate the unit after ambient tempeature and
Yes
humidity is decreased or move the unit to the
place with low abient temprature and humidity.
No
Clean the heat exchangers and remove
Yes
blockage of air inlet/outlet.
No
Check motor and re-install the moto
Yes
to make it run normally.
No
Make compressor run normally.
Yes
No
Remove blockage in the system.
Yes
No
Replace the temperature sensor.
Yes
No
Malfunction is
Yes
eliminated.
Malfunction is
Yes
eliminated.
Malfunction is
Yes
eliminated.
Malfunction is
Yes
eliminated.
Malfunction is
Yes
eliminated.
Malfunction is
Yes
eliminated.
Installation and Maintenance