H16

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
Refer to Service Manual Technical Graph for Temp vs Current and Pressure
Caution For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.
In forced cooling, check suction pressure versus running current
IF CONDITION 1:
Suction pressure and running current is normal
  • Check & replace defected CT
IF CONDITION 2:
Running current is much too low and suction pressure is much too high
  • Compressor Lack Compression
  • Replace Compressor
IF CONDITION 3:
Running current and suction pressure is very low
  • Check for gas leaking source; Repair or replace defected part(s)
  • Capillary tube/expansion valve blockage; Replace defected part(s)

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