Fujitsu ADUH09LUAS1, Service Manual

Page: 67 / 156

2-11. E: 3A. Indoor unit communication circuit (wired remote
controller) error
Indicator
→ired remote
controller
Error code E: 3A
Detective actuator →ired remote controller (2-wire)
Detect the communication error of microcomputer and
communication PCB.
Indoor unit controller PCB circuit
Forecast of cause
Communication PCB defective
Indoor unit main PCB defective
Check point 1. Check the connection of terminal
• After turning off the power supply, check and correct the followings
Indoor unit - Check the connection the communication PCB and the main PCB
Check Point 2 : Replace the communication PCB
If the Check point 1 is ok, replace the communication PCB
Check Point 3 : Replace the main PCB
If condition is doesn’t change, replace the main PCB
End
2-11. E: 3A. Indoor unit communication circuit (wired remote controller) error
- (03-15) -
2. Troubleshooting with error code
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G