Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 274

Troubleshooting by Error Code
Troubleshooting
Note(s)
1. Pull out and insert the connector once and check if it is absolutely connected.
2. Method to check transmission part of indoor unit control PCB.
(1) Turn OFF the power and remove the connector X70A of indoor unit control 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
 After confirmation, turn OFF the power, take off the short circuit and connect X70A back to
original condition.
267
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 control PCB NO
(A1P) and fan PCB
(A2P) accurately
connected?
(∗1)
YES
Confirm the condition of
transmission on indoor
unit control PCB using
field setting mode. (∗2)
Under
above field
NO
setting mode, second
code No. is 01.
YES
Connect the connector
X70A and turn ON the
power again.
C1 is
YES
displayed
again.
NO
01: Normal
Other than 01: Transmission error on indoor unit control PCB
SiUS341802EC
Connect the connector
accurately.
Replace the indoor unit control
PCB (A1P).
Replace the fan PCB (A2P).
Connect it and continue the
operation (It is possible to have
a cause, such as instantaneous
power failure).
Part 6 Service Diagnosis