Daikin FTK Series User Manual

Troubleshooting DAMA-SM-21-001
59 Service Diagnosis
4.2 Indoor Unit PCB Abnormality
Error Code A1
Description Indoor PCB Abnormality
Method of Error
Detection
The system checks if the circuit works properly within the microcomputer of the indoor unit.
Error Decision
Conditions
ON/OFF switch malfunction.
Possible root
cause
1. Defective indoor unit PCB.
2. Defective ON/OFF switch.
Troubleshooting
Caution
Turn off the power
supply
Press the ON/OFF
switch
Can be pressed?
Turn on the power
supply
Is error repeat?
Completed
Completed
Remove the casing
Press the ON/OFF
switch again
Is the ON/OFF
switch can be
pressed?
Turn off the power
supply & replace the
indoor unit PCB
(Display PCB)
Turn on the power
supply
Turn on the power
supply
Is error repeat?
Is error repeat?
Replace the indoor unit PCB.
(Control PCB)
Replace the indoor unit PCB.
(Control PCB)
Ye s
Ye s
Ye s
No
No
No
Completed
No
Replace the
indoor unit PCB.
(Display PCB)
No
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Ye s
Ye s

Daikin FTK Series Specifications

General

Brand	Daikin
Model	FTK Series
Category	Inverter
Language	English