Daikin VRV IV-S RXTQ-TAVJU Series Service Manual page 168

Troubleshooting by Error Code
Troubleshooting
∗1. Pull out and insert the connecter once and check it is absolutely connected.
Note:
∗2. Method to check transmission part of indoor unit main PCB.
155
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
connector between
indoor unit PCB (A1P) and fan
PCB (A2P) accurately
connected? (∗1)
YES
Confirm the condition of
transmission on indoor unit
PCB using field setting mode.
(∗2)
Under
above field setting
mode, second code
01
No. is .
YES
Connect the connecter X70A
and turn ON the power again.
C1
Reoccurrence
of error.
NO
(1) Turn OFF the power and remove the connecter X70A of indoor unit main PCB (A1P).
(2) Short circuit X70A.
(3) After turning ON the power, check below numbers under field setting from remote controller.
(Confirmation: Second code No. at the condition of first code No. 21 on mode No. 41)
Determination 01: Normal
Other than 01: Transmission error on indoor unit main PCB
∗ After confirmation, turn OFF the power, take off the short circuit and connect X70A back to
original condition.
NO
NO
YES
↓
SiUS331604E
Connect the connector accurately.
Replace the indoor unit main
PCB (A1P).
Replace the fan PCB (A2P).
Continue the operation (It is
possible to have a cause, such
as instantaneous power failure).
Service Diagnosis