Service manual

Troubleshooting by Indication on the Remote Controller SiUS28-902_a
91 Troubleshooting
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts could be damaged.
Provide 208~230V power
supply.
YES
NO
Is power supply
208~230V provided?
Replace the limit switch
connecting cable.
Replace the indoor unit P.C.B.
Replace the power supply
connecting cable.
Replace the louver motor.
Take the cam mechanism
apart, reassemble and turn on
again.
YES
NO
YES
YES
NO
YES
NO
Connect the connector to X9A
and turn on again.
Replace the indoor unit P.C.B.
NO
NO
YES
NO
YES
NO
YES
YES
NO
Indoor unit
is a model equipped
with a louver
function
The louver
motor works when
the power supply is turned
off and then back
on.
When
the airflow
direction louver’s cam
mechanism is disconnected
from the louver motor,
operation is normal
when turned
on again.
The connecting cable
has no continuity.
After
turning
the louver
ON and then stopping
with the remote controller,
the voltage of X6A (or X29A)
of the indoor unit P.C.B. is
208 ~ 230 VAC
when turned on
again (within 30
seconds of
turning on
again).
The connector
is connected to X9A (or X15A) of
the indoor unit
P. C . B .
The limit switch
functions normally.
The connecting
cable is short-circuited
or disconnected.
Replace the louver motor.