Part 9 Troubleshooting; Malfunction Analysis - Gree GWH09AB-A3DNA1B Service Manual

9. Troubleshooting

9.1 Malfunction Analysis

Note: When replacing the controller, make sure insert the wire jumper into the new controller, otherwise the
unit will display C5
Trip of breaker
or blow of fuse
The air condition-
er does not react
after it is power-
ed ( after the plug
is inserted,
the buzzer does
not sound and
the remote star-
tup has
no response)
The remote con-
troller does not
receive signals
(after it is
powered, the
buzzer will
sound, unless it
has malfunction)
The breaker trips at once when it
is set to "ON".
The breaker trips in few
minutes when it is set
to "ON"
No power
Power plug is not well plugged in
and poor con-nection
Fuse of controller burnt out
The transformer connection is loose or
has bad contact or the transformer
has malfunction
Controller is broken
Remote controller is short of power
Remote controller malfunction
Receiver loose or poor connection
Receiver is broken
Power voltage is too low
Measure insulation resistance
to ground to see if there is any
leakage.
The circuit or the part of the air conditioner has
malfunction. They heat and break the insulation
and lead to short circuit or creepage. Measure
the insulation resistance or eliminate the mal-
function one by one. If the breaker itself has
malfunction, then replace the breaker.
Check power supply circuit.
Check if the plug is properly
plugged in and make the loose
contact firm.
Change controller fuse
Fasten the wiring; measure the
output voltage of the transformer, if
it is incorrect, change the
transformer
Check remote controller
Change batteries
First, press the manual switch button
AUTO, if there is no response,check
based on the above methods. If it runs
normally after pressing the button,
check again whether the installation
position and the connection wire
of the reception head is correct. If it is
correct,then replace the receiver or the
remote controller.
Check the voltage. If it is lower than 10£¥ of the
rated voltage, check the cause, improve the power
supply condition and add the stabilized voltage
power supply.
43
Troubleshooting