10
Inefficient
cooling
Check wiring
Check room heat
load and windows
Check Whether the
evaporator or
condenser is
blocked.
Check compressor
and motor capacitor.
Check temperature
sensor.
Is the voltage of
RL4 and CN11 on
main board correct?
Check fan speed
Yes
No
Replace main board
Check air filter
Is temperature of
suction pipe on
compressor higher
o
than 19 C?
No
Replace compressor
Check leakage,
repair and recharge
refrigerant
Yes
Check room heat
load
Check the pipe, the
tie-in, the dis-
charger.
Water seep from
unit
Check water tank
Check water stopper
Check heat-
insulation foam inner
the unit.
Check water depth
controller switch
Replace main board
Check water pipe
in the unit.
