Daikin FTXS09HVJU, Service Manual, Page: 110 / 274

Troubleshooting SiUS04-904
Service Diagnosis 99
4.2 Indoor Unit PCB Abnormality
Remote
Controller
Display
A1
Method of
Malfunction
Detection Evaluation of zero-cross detection of power supply by indoor unit.
Malfunction
Decision
Conditions When there is no zero-cross detection in approximately 10 continuous seconds.
Supposed
Causes

Faulty indoor unit PCB

Faulty connector connection
Troubleshooting
Note:
Connector Nos. vary depending on models.
Connector connection check
(note).
Is it normal?
YES
N O
(R7130)
Caution
Be s u re to t u rn off the po w er s w itch b efore connecting or disconnecting
the connector, or parts damage may occ u r.
Model Type Connector No.
Wall Mounted Type Terminal strip~Control PCB