Troubleshooting Si12-411A
180 Service Diagnosis
5.9 Unspecified Voltage (between Indoor and Outdoor Units)
Remote
Controller
Display
UA
Method of
Malfunction
Detection
The supply power is detected for its requirements (different from separate type and multi type)
by the indoor / outdoor transmission signal.
Malfunction
Decision
Conditions
The separate type and multi type are interconnected.
Supposed
Causes
Wrong models interconnected
Wrong indoor unit PCB mounted
Indoor unit PCB defective
Wrong outdoor unit PCB mounted or defective
Troubleshooting
Check the indoor and outdoor unit
model numbers.
Match the compatible
models.
Change for the specified
PC board (1) or (2).
Replace the indoor unit PC
board (1) (or the outdoor
unit PC board).
(Q0347)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Indoor unit and outdoor unit
matched?
NO
YES
YES
Matched compatibly?
NO
Check the code numbers
(2P01234, for example) of the
indoor and outdoor unit PC boards
with the Parts List.
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