Indoor Unit Pcb Abnormality - Daikin FTKS20CVMB Service Manual

Troubleshooting
4.2

Indoor Unit PCB Abnormality

A1
Remote control
Display
Evaluation of zero-cross detection of power supply by indoor unit.
Method of
Malfunction
Detection
When there is no zero-cross detection in approximately 10 continuous seconds.
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Connector Nos. vary depending on models.
Note:
Wall Mounted Type 20 / 25 / 35 class Terminal strip~Control PCB
110
Faulty indoor unit PCB
Faulty connector connection
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Connector connection check
(note).
Is it normal?
YES
Model Type
NO
Connector No.
SiENBE04-401A
Correct connections.
Replace PCBs.
(R1400)
Service Diagnosis