Hisense AHM-080HCDSAA - Page 360

339
Troubleshooting
Phenomenon Cause Check item Action (Turn OFF Main Switch)
Power failure or power is not ON Measure the voltage by tester. Supply power.
Melted Fuse for Power
Supply
or Activation of Breaker
(Outdoor Unit )
Short Circuit between Wires Check for breakage of insulation.
Remove cause of short circuit. Replace
fuse on I.U. PCB1 or O.U.main PCB if
faulty.
Short Circuited Wire
to Ground
Measure insulation resistance.
Remove cause of short circuit. Replace
fuse on I.U. PCB1 or O.U.main PCB if
faulty.
Faulty Comp. Motor
Measure resistance between wires
and insulation resistance.
Replace O.U. main PCB.
Faulty Outdoor Unit
Fan Motor
Measure resistance
between wires and
insulation resistance.
Replace outdoor unit fan motor and fuse.
Replace O.U. PCB if faulty.
Melted Fuse on PCB
(Outdoor Unit)
Short Circuit between Wires Check for breakage of insulation. Remove cause of short circuit.
Short Circuit (to Ground) Measure insulation resistance. Remove cause of short circuit .
Faulty Electrical Coil
Resistance for Comp.
Motor
Measure resistance of coil.
Replace Compressor wiring or
Compressor refer to 1.3.4.
Failure of Outdoor Unit Fan
Motor
Measure resistance between wires
and
insulation resistance.
Replace fan motor refer to 1.3.4.
Incorrect Power Supply Circuit of O.U. main PCB Measure O.U. main PCB output. Replace electrical box
Disconnected Wires
Insu󰀩cient Contacting
or Incorrect Connection
Between Outdoor Unit and
Indoor Unit
Check continuity of wires.
Check for looseness of connection
screws. Check terminal Nos.
Replacing wires, repairing and tightening
screws.
Power Supply Wiring for
Outdoor Unit
Correctly connect wires.
Faulty PCB(Outdoor
Unit,Indoor Unit)
Disconnected Wires to Check
connection I.U.PCB1/O.U.
main PCB
Check connections. Correctly connect wires.
Faulty I.U.PCB1/O.U. main PCB Replace it if faulty.
Incorrect Wiring
Disconnected Wire
Insu󰀩cient Contacting
Check continuity
and looseness of
connection screws.
Replacing Wires,
Repairing and
Tightening Screws
Incorrect Wiring Check terminal Correctly connect wires.