Daikin R71FUV1 Service Manual page 124

Troubleshooting by Remote Controller
∗2. Method to check transmission part of indoor unit
PCB.
1 Turn OFF the power and remove the connecter
X70A of indoor unit PCB.
2 Short circuit X70A.
3 After turning ON the power, check below numbers
under local setting remote control. (Confirmation:
Second code No. at the condition of first code No.
21 on mode No. 41)
Determination 01: Normal
∗ After confirmation, turn OFF the power, take off the
short circuit and connect X70A back to original
condition.
↓
Other than 01: Transmission defect
Si20-701_B
on indoor unit PCB
117