Service diagnosis
38
Domestic air conditioner
Ŷ
The outdoor PCB is broken
Ŷ
The IPM module is broken
Ŷ
Communication wiring disconnected
* Caution Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
10.4.8 Power Supply Over or under voltage fault
Outdoor display: F19:LED1 flash 6 times The power supply is over voltage
An abnormal voltage rise or fall is detected by checking the specified voltage detection
circuit.
1) Check whether plug of MODULE COM and MODULE POWER on the outdoor
PCB and IPM module is tight connected
2) Check whether the connection of P & N wire between IPM and outdoor is tight
Is the connection OK?
1.Check whether the voltage between 1
and 2 of Module Power
is about DC5V,
2.Check whether the voltage between2
and 3 of Module Power is about DC15V,
Replace outdoor PCB
Replace power module
YES
NO
NO
YES
Malfunction unsolved
1) Pull out and reinsert the terminals.
2) Replace connected wire
Troubleshooti
ng
Supposed
Causes
Method of
Malfunction
To Next Page
Loading...
Need help?
General
