Faulty Outdoor Unit Pcb - Daikin FTK25JVE9 Service Manual

Si04-115
5.13

Faulty Outdoor Unit PCB

∗
Remote
Controller
Display
Outdoor unit LED A
Display
Method of The proper program operation of the microcomputer is checked by the program.
Malfunction
Detection
Malfunction When the microcomputer program does not function properly.
Decision
Conditions
"
Supposed
Causes
"
Troubleshooting
Service Diagnosis
4
Microcomputer program run-away due to an external factor.
∗
Noise
∗
Momentary voltage drop
∗
Momentary power failure, etc.

Faulty outdoor unit PCB.

Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn on the power again.
Does the same LED
indication appear
again?
NO
Check the grounding.
Is the grounding proper?
YES
YES
NO
Trouble shooting
Replace the outdoor unit PCB.
Provide proper grounding.
The malfunction may be
caused by an external factor,
rather than defective parts.
Locate the cause of the noise,
etc., and correct the situation.
(R1957)
79