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8.7. Outdoor fan remaining heat removal control
• When compressor stop, outdoor fan operate for 1 minute to remove the remaining heat.
8.8. Crank case heater control
• Crank case heater power is on to prevent the refrigerant solving into compressor oil inside of the compressor shell at cold
condition.
• When below conditions are satisfied, crank case heater power on.
- Compressor stop
- Outdoor temperature
15C
- Compressor discharge temperature
15C
8.9. Valve error
• When install the air conditioner unit and try to start forced operation (cooling mode) after completion the installation, in case of 3
way valve close, valve error displayed at the wired remote controller to protect the compressor.
• This error can be detected to satisfy below condition, when power is on at first time and within 7 minutes from compressor start.
(However, it is judged that power on is the first time until compressor start operating continuously for 7 minutes)
- Indoor heat exchanger temperature when compressor start - 3K < current indoor heat exchanger temperature for 5 minutes
- Indoor suction temperature - 3K < current heat exchanger temperature for 5 minutes.
8.10. Pump down operation
• When pushing the [PUMP DOWN] button on the outdoor PCB for 1 second, pump down operation start. Detail of pump down
operation is shown at below table.
• During pump down operation, push the [PUMP DOWN] button once again for 1 second, pump down operation stop.
• After 600[Sec] past, pump down operation stop.
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