Malfunction Analysis - Gree KF-20GW/A20 Service Manual

12

Malfunction Analysis

Trip of breaker or
blow of fuse
Neither indoor nor
outdoor unit could
run
Improper set of temp.
If cooling (heating) load is proper
Flow malfunction
of refrigerant
Shortage on airflow
volume
Improper of install place of outdoor
unit
It trips at once when the breaker
is set to "ON"
Breaker trops in few minutes when
unit is set to "ON"
No power supply
Power plug is not inserted well or
loose contact
Wrong wire connect between indoor
and outdoor unit.
Transmit malfunction of wireless
remote control
Blows of control fuse
If connection between heavy and light
current board of control firm
If the outlet wire of transformer if firm,
if there is voltage outlet
Adjust set temperature
Check the forecasted load of cooling
(heating)
Malfunction of 4-way valve
Shortage of refrigerant
Malfunction of compressor
Short flow in valve
Block of air filter
Set of rotate speed of fan is too low
The install of outdoor unit requires well ventilation and
flashing and sun visor should be installed
129
Bird Single-Split Type
Measure insulation resistance to
earth to see if it creepages
Check breaker, and measure resistance
to circuit-short
Check power supply circuit
Check and plug well plug, make
loosen contact firm
Check the circuit depending on circuit
diagram and correct wrong connection
Check wireless remote control
Change control fuse
Make the connect wire firm
Make the connecting wire firm and
check the outlet voltage
Change the 4-way valve
Charge refrigerant
Change compressor
Open valve completely
Clean filter
Turn rotate speed to HI or MEDIUM