F97

Malfunction Decision Conditions

  • During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor.

Malfunction Caused

  • Faulty compressor tank temperature sensor
  • 2/3 way valve closed
  • Refrigerant shortage (refrigerant leakage)
  • Faulty outdoor unit PCB
  • Faulty compressor

Troubleshooting

When F97 indication happens
⚠
Caution For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.
↓
Check the compressor tank temperature sensor.
↓
Does it conform to the sensor characteristic chart?
NO
→
  • Replace the compressor tank temperature sensor.
YES
↓
2/3 way valve closed?
YES
→
  • Open the 2/3 way valve.
NO
↓
Check for gas leakage.
↓
Oil oozing out from the 2/3 way valve?
YES
→
  • Repair the pipe flare or union nuts.
  • Reclaim and recharge refrigerant.
NO
↓
Check if expansion valve or strainer clogged (ice formed)
YES
→
  • Replace expansion valve and/or strainer
  • Reclaim and recharge refrigerant
NO
↓
Reclaim and recharge for a specified amount of fresh refrigerant
↓
Refrigerant cycle abnormality error again?
YES
→
  • Replace outdoor unit PCB
  • Replace outdoor unit compressor
NO
↓
NO
►
  • Procedure complete
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