Mitsubishi Electric PUHY-P250YNW-A Service Handbook page 115

[5-4 Operation Flow Chart ]
2. Operations in each mode
(1) Cooling operation
1. Inverter output 0Hz
2. Indoor unit LEV, LEV1
LEV2 rated opening
3. All solenoid valves OFF
4. Outdoor unit fan stop
5. 72C OFF
*Note 1. The indoor fan operates in the cooling mode regardless of the ON/OFF state of the thermostat.
*Note 2. The following two methods are available to perform the test run.
1) Using DipSW3-1 and 3-2 on the outdoor unit
2) Using MA remote controller
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- chapter 5
Cooling operation
4-way valve OFF
Indoor unit fan
*Note 1
operation
YES
Test run mode
ON
NO
NO
*Note 2
Thermostat ON
YES
YES
20-second restart
prevention
NO
1. Inverter frequency control
2. Indoor unit LEV, LEV1 control
LEV2 fully opened
3. Solenoid valve control
4. Outdoor unit fan control
5. 72C control
Normal operation
During test run mode
Unit in the stopped state
BS_05_C