Daikin FTKS20D3VMW, Service Manual

Page: 247 / 355

Troubleshooting SiENBE12-713
236 Service Diagnosis
5.3 Indoor Unit PCB Abnormality
Remote Control
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.
Control connector
Connector connection check
(note).
YE S
I s it norm a l?
NO
Correct connection s .
Repl a ce PCB s .
(R1400)
Caution
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.
Model Type Connector No.
Wall Mounted Type 20 / 25 / 35 class Terminal strip~Control PCB
Wall Mounted Type 50 / 60 / 71 class Terminal strip~Control PCB
Duct Connected Type Terminal strip~Control PCB
Floor / Ceiling Suspended Dual Type S37
Floor Standing Type Terminal strip~Control PCB