• Press Test Run button for 1 second. SW1 located at outdoor printed circuit board.
• During Pump Down operation, push the Test Run button again for 1 second to stop the pump down operation.
• The pump down operation runs for 10 minutes.
9.8. Protection control
9.8.1. Outdoor Low-pressure Protection Control
• The purpose of low-pressure protection control is gas leakage detection control.
• The low-pressure protection control starts when low-pressure switch is activated less than 15 minutes after compressor startup.
During heating operation or deice control low-pressure detection does not start.
• During this protection control, compressor is shut down, indoor unit is set to thermo-off status.
• After 6 occasions, suction pressure error is displayed; all operations stopped except outdoor fan remaining heat removal
control.
9.8.2. Outdoor High-pressure Protection Control
• The high-pressure protection control starts when high-pressure switch is activated less than 15 minutes after compressor
startup.
• During this protection control, compressor is shut down. And indoor unit is set to thermo-off status.
• After 6 occasions, high-pressure protection error is displayed; all operations stopped except outdoor fan remaining heat removal
control.
9.8.3. Discharge Temperature Protection Control
• The discharge temperature protection control starts when abnormal compressor temperature 115°C is detected when outdoor
unit is operating in cooling or heating operation.
• During this protection control, compressor is shut down. And indoor unit is set to thermo-off status.
• After 6 occasions, high-pressure protection error is displayed; all operations stopped except outdoor fan remaining heat removal
control.
9.8.4. Over Current Protection Control
• The purpose of over current protection control is to protect the air conditioner from over current.
• The over current protection control starts when input current from CT is maintained at 20A or more for 2 seconds when the
outdoor unit is starting up or during cooling or heating operation.
• During this protection control, compressor is shut down. And indoor unit is set to thermo-off status.
• After 4 occasions, over current protection error is displayed; all operations stopped except outdoor fan remaining heat removal
control.
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