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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
When abnormality indication starts again
Suction pressure and running current is
normal
Refer to Service Manual Technical Graph
for Temp vs Current and Pressure
In forced cooling, check suction pressure
versus running current
Running current is much too low and
suction pressure is much too high
Running current and suction is
very low
For safety reason and to
prevent component
breakdown, always switch off
the power before remove and
connect the component.
Check & replace defected CT
Compressor Lack Compression
Replace Compressor
Check for gas leaking source; Repair
or replace defected part(s)
Capillary tube/expansion valve
blockage; Replace defected part(s)
Caution
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