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14.4.5 H16 (Outdoor Current Transformer Open Circuit)
Malfunction Decision Conditions
• A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and
CT detected input current (less than 1.14A) for continuously 20 seconds.
Malfunction Caused
• CT defective
• Outdoor PCB defective
• Compressor defective (low compression)
Troubleshooting
When abnormality indication starts again
Check the functionality of current transformer (CT)
• Replace Compressor due to compressor low
compression
Is the CT open circuit?
Force heating operation and measure:
• Running current
• Suction pressure
• Check for gas leaking source; Repair or replace
defected part(s).
Replace the outdoor PCB
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Is the running current less than 0.65A and suction pressure
120psi?
YES
NO
YES
NO
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