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15.5.5 H16 (Outdoor Current Transformer)
Malfunction Decision Conditions
An input current, detected by Current Transformer CT, is below threshold value when the compressor is
operating at certain frequency value for 3 minutes.
Malfunction Caused
Lack of gas
Broken CT (current transformer)
Broken Outdoor PCB
Troubleshooting
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Refer to Service Manual Technical Graph
for Temp vs Current and Pressure
In forced cooling, check suction ressure
versus running current
Running current and suction pressure is
very low
When abnormality indication starts again.
Check for gas leaking source; Repair
or replace defected part(s)
Capillary tube/expansion valve
blockage; Replace defected part(s)
Running current is much too low and
suction pressure is much too high
Caution
Compressor Lack Compression
Replace Compressor
Suction pressure and running current is
normal
Check & replace defected CT
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