81
[P22]
[Fan system trouble]
[Confirmation of independent operation of outdoor fan]
Service switches SW01 and SW02 can be used to check the operation of the 4-way valve relay.
Use to check whether there are any problems with the 4-way valve or 4-way valve coil.
[Method of operation]
1) Ensure that D800 to D804 are off (or rapidly flashing) and that D805 is lit up. If D800 to D804 are
slowly flashing or D805 is flashing then please push and hold down SW01 and SW02 at the same
time for at least 5 seconds.
D800 to D804 will turn off (or rapidly flash) and D805 turn on.
2) Push and hold down SW01 for at least 5 seconds. D804 will start slowly flashing.
3) Push SW01 until reaching the below [Confirmation of independent operation of outdoor fan] LED
indication.
4) Push SW02 until D805 starts rapidly flashing.
5) Push and hold down SW02 for at least 5 seconds. D804 will start slowly flashing, D805 will turn
on, and fan will start operation.
6) Push and hold down SW01 and SW02 at the same time for at least 5 seconds or wait 2 minutes
until fan operation stops.
* If any unclear point arises during an operation then can return to step 1 by pressing and holding
down SW01 and SW02 at the same time for at least 5 seconds.
[P26]
[Short-circuit of compressor drive element]
Check
code
Outdoor LED
indication
Check and troubleshooting
(Item without special mention indicates part of outdoor unit.)
NO
Replace fan motor.
Replace fuse.
Check wiring construction.
Ask repair of power supply.
Replace outdoor P.C. board
Is power supply voltage normal?
AC198 to 264 V
NO
Is the fuse normal?
(Near the terminal block)
NO
YES
YES
YES
Rotate shaft of the fan motor by hands
during power-OFF. Can it rotate smoothly?
Is coil resistance of fan motor correct?
Between red and white lead wire: 12 to 20 Ω
Between white and black lead wire: 12 to 20 Ω
Between black and red lead wire: 12 to 20 Ω
: Go OFF,
: Go ON,
: Flash (5 times/sec.)
Confirmation of independent
operation of outdoor fan
D800
D801
D802
D803
D804
Are connections of
compressor lead wires and reactor correct?
(Check referring to the Wiring diagram.)
NO
Correct wiring.
YES
Replace outdoor
P.C. board.
YES
Does the same trouble occur in
operation without compressor lead wires?
Check compressor. (Layer short, etc.)
Malfunction → Replace
NO
