Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
123
Troubleshooting
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 of remote controller.
(Confirmation: second code No. at the condition of first code No. 21 on mode No. 41)
After confirmation, turn OFF the power, take off the short circuit and connect X70A back
to original condition.
Confirm the condition of
transmission on indoor unit
PCB using field setting mode.
(
∗
2)
Connect the connector X70A
and turn ON the power again.
Connect the connector
accurately.
Is the
connector between
indoor unit PCB (A1P)
and fan PCB (A2P)
accurately
connected?
(
∗
1)
Replace the fan PCB (A2P).
Error is
displayed again.
Connect it and operate (It is
possible to have a cause,
such as instantaneous
blackout)
NO
Replace the indoor unit PCB
(A1P).
Under above
field setting
mode,
installation position
is "
01
".
NO
YES
NO
YES
YES
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
Determination
01: Normal
Other than 01: Transmission defect on indoor unit PCB
