Gree GWH18UC-K3DNA1A/I Service Manual page 38

Improper set of temperature
If cooling (heating) load is
proper
The refrigerant has leakage or is
insufficient
Leakage between the high pres-
sure and the low pressure in-
Malfunction of
side the compressor
r e f r i g e r a n t
flow
Malfunction of four-way valve
Local block of capillary
Blockage of cooling system
Heat insulation for the connection
pipes of the indoor unit and the out-
door unit is bad.
Block of outdoor heat ex-
changer
Air filter were blocked
Fan speed was set too slow
Air circulation
is insufficient
Fan rotation speed becomes
low
The installation position of the
outdoor unit is not appropriate.
The outdoor temperature is too high.
The air tightness is not enough. People
come in and out too frequently. There
are heating devices indoors.
Adjust set temperature
Check the forecasted load of cooling (heating)
Check and fill the leakage, then
vacuumize it and supplement the re-
frigerant as required
Replace the compressor
Replace the four-way valve
Replace the capillary
Judge whether the system is blocked by
observing the condensation of evapora-
tor and the pressure value of the high
pressure manometer and take measures
to deal with the system.
Make sure that heat insulation for the thick and thin pipes
is good. Heat insulation must also be provided for the
joint andthe exposed part of the copper pipe .
Clean the dust accumulated on the surface of
the heat exchanger.
Clean the filter
To set the fan speed to high or
middle speed
Capacitor
damage
Motor damage
Good ventilation must be provided for the
installation position of the outdoor unit.
Properly install the rainproof plate or the sunproof plate. If the
maximum cool air still can not meet the requirement, it is sug-
gested to replace the air conditioner.
Keep certain air tightness indoors, try not to use
electricalappliance with large quantity of heat
Replace the capaci-
tor
Replace the motor