Daikin RZQ Series FCQ20EVA Service Manual page 111

SiME281501E
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
between indoor unit PCB
(A1P) and fan PCB (A2P)
accurately connected?
Confirm the condition of transmission
on indoor unit PCB using field setting
mode. (∗2)
field setting
installation position is
Connect the connector X70A and turn
ON the power again.
Note:
1. Pull out and insert the connector once and check it is absolutely connected.
2. Method to check transmission part of indoor unit PCB.
1 Turn OFF the power and remove the connector X70A of indoor unit PCB (A1P).
2 Short circuit X70A.
3 After turning ON the power, check below numbers under field setting remote control. (Confirmation:
second code No. at the condition of first code No. 21 on mode No. 41)
Determination
 After confirmation, turn OFF the power, take off the short circuit and connect X70A back to original
condition.
Service Diagnosis
Is the connector
NO
(∗1)
YES
Under above
NO
mode,
01
" ".
YES
Error is
YES
displayed again.
NO
01: Normal
Other than 01: Transmission defect on indoor unit PCB
Troubleshooting by Remote Controller
Connect the connector
accurately.
Replace the indoor unit PCB
(A1P).
Replace the fan PCB (A2P).
Connect it and operate (It is
possible to have a cause, such
as instantaneous blackout)

102