Troubleshooting; Indoor Unit - Daikin AT12BV1LS Pocket Manual

Troubleshooting

5. Troubleshooting

5.1 Indoor Unit

5.1.1 Indoor Unit PCB Abnormality
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Note: Connector Nos. vary depending on models.
24
A1
Evaluation of zero-cross detection of power supply by
indoor unit.
When there is no zero-cross detection in approximately
10 continuous seconds.
Faulty indoor unit PCB
Faulty connector connection
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Connector connection check
(note).
Is it normal?
YES
Control connector
Model Type
Wall Mounted Type
20/25/35 class
Wall Mounted Type 50/60/71
class
Ceiling Embedded Duct Type Terminal strip~Control PCB
Duct Connected Type
Floor / Ceiling Suspended
Dual Type
Floor Standing Type
NO
Correct connections.
Replace PCBs.
Connector No.
Terminal strip~Control PCB
Terminal strip~Control PCB
Terminal strip~Control PCB
S37
Control PCB : S7, S201, S203
Power Supply PCB : S8, S202, S204
Service Diagnosis
Si10-417
(R1400)