Troubleshooting by Remote Controller Si20-701_B
355
Supposed Causes
Refrigerant shortage
Clogged refrigerant piping system
Mismatching of wiring and piping
Troubleshooting
Refer to P.477.
Refer to P.478.
Is
wiring and
piping connection
matched?
NO
YES
YES
Collect
refrigerant and
recharge a
proper amount of
refrigerant after
vacuum drying.
Check for refrigerant
shortage.
Check the transmission
wiring and piping between
the indoor and outdoor
units.
CHECK 12
CHECK 11
Is the
refrigerant
level proper?
NO
Match wiring and
piping
connection.
Check the
refrigerant piping
system for
clogging.
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
CHECK 11
CHECK 12
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