SiUS281117
Troubleshooting by Remote Controller
112
Service Diagnosis
Troubleshooting
Note:
If “
A3
” is detected by a PCB which is not mounted with X15A, the PCB is defective.
Remove the float switch and
short circuit, then restart
operation.
Is the drain water
level abnormally
high?
Does
the drain pump
work after restarting
operation?
Is a drain pump
connected to the indoor
unit PCB?
Check
the continuity of
short circuit connector
.
Is
there continuity?
YES
YES
YES
Is the short circuit
connector connected to
the indoor unit
PCB?
NO
NO
NO
Is the float
switch connected to the
indoor unit PCB?
NO
NO
NO
NO
NO
Is the drain
pump mechanism
connected?
YES
YES
YES
Error is
displayed again.
YES
YES
220 (±10%) VAC?
YES
NO
Set to “emergency” and check
the voltage of the connector to
which the drain pump is
connected.
Short circuit connector
connection
Replace the short circuit
connector.
Replace the indoor unit
PCB.
Connect the drain pump
Drain system abnormality
Connect the float switch.
Replace the float switch.
Replace the indoor unit PCB.
Replace the drain pump.
Replace the indoor unit
PCB
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
