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13.5.18 F91 (Refrigeration Cycle Abnormality)
Malfunction Decision Conditions
The input current is low while the compressor is running at higher than the setting frequency.
Malfunction Caused
Lack of gas.
3-way valve close.
Troubleshooting
When F91 indication happens
Check 3 way valve
3-way valve opened?
Check for gas leaking source (Refer to H16)
Gas leaking?
Check other parts in refrigeration cycles
YES
NO, gas amount is OK
Caution
NO, closed
●
Open 3 way valve
●
Check for gas leaking source;
YES
Repair or replace defected part(s)
●
Re-claim and then re-charge the
right amount
60
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
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