E11 Indoor Unit Receive Failure From Signal Output Board - Panasonic 2WAY Multi Technical & Service Manual

E11 Indoor Unit Receive Failure from Signal Output Board

(Cannot be detected when the water heat exchanger unit is connected.)
Error detection method
After confi rming existence of the signal output board, an error is determined upon no reception from the signal
output board.
• Signal output board is defective.
• Wiring to signal output board is defective.
Troubleshooting
1
Wiring to signal output board (option board) broken or
Signal output 1-1
short-circuited?
board
Replace the signal output board (option board) and wiring.
1-2
Is E11 displayed again?
● See instructions packaged with servicing indoor board for procedure on replacing indoor control board.
IV–47
Yes Repair wiring
No 1-2
Replace indoor control
Yes
board
Replace signal output
No
board