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2.7 4 way Valve
1. Keep it off before the outdoor unit is powered on and the indoor unit is turned on.
2. Cooling, defrosting, oil recovery : OFF, heating : ON
3. When alternating cooling to heating, transform 4 way valve during re-starting for 3 minutes.
4.
To check the mode of cooling/heating operation of 4 way valve, touch the piping surface of low pressure service valve.
5. Refrigerant flowchart of 4 way valve
6. Insulation resistance in the state of connecting the valve to coil should be over 100mΩ when measure it with DC
mega tester(DC 500 V).
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