Troubleshooting by Remote Controller Si20-701_B
449
Troubleshooting
Note:
Wiring check operation may not be successful if
carried out after the outdoor unit has been OFF for
more than 12 hours, or if it is not carried out after
running all connected indoor units in the fan mode for
at least an hour.
NO
NO
NO
Are the
stop valves
opened?
Is the
check operation
carried out?
Is
indoor -
outdoor and
outdoor - outdoor unit
transmission
wiring
normal?
Open stop valve.
Is
indoor-
outdoor and
outdoor-outdoor unit
transmission wiring
normal?
YES
YES
NO
YES
After fixing
incorrect wiring,
press and hold
the RESET
button on the
master outdoor
unit PCB for 5
seconds.
∗ The unit will not
run for up to 12
minutes.
Wiring check
operation may
not have been
carried out
successfully.
YES
Replace the
indoor unit PCB.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
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