Service Manual

Troubleshooting by Error Codes SiUS281811E
250 Part 6 Service Diagnosis
YES
NO
Is
indoor-outdoor unit
transmission wiring
normal?
Fix the indoor-outdoor
unit transmission wiring.
Press and hold the RESET
(BS5) button on the outdoor
unit PCB for 5 seconds.
Replace the outdoor main
PCB (A1P).
YES
NO
NO
Replace the outdoor main
PCB (A1P).
YES
Operation ready
lamp (H2P) is
blinking.
Lamp
does not go
off for 12 minutes or
more.
A
NO
YES
Outdoor unit PCB
microcomputer monitor
(HAP) blinks.