Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 176

2. Operations in each mode <PUHY>
(1) Cooling operation
1. Inverter output 0Hz
2. Indoor unit LEV,
LEV1 rated opening
3. All solenoid valves OFF
4. Outdoor unit fan stop
5. 52C1 OFF
*Note 1. The indoor fan operates at the set notch under cooling mode regardless of the ON/OFF state of the thermostat.
Cooling operation
4-way valve OFF
Indoor unit fan
*Note 1
operation
YES
Test run mode
ON
NO
NO
Thermostat ON
YES
YES
3-minute restart
prevention
NO
1. Inverter frequency control
2. Indoor unit LEV, LEV1
rated opening
3. Solenoid valve control
4. Outdoor unit fan control
5. 52C1 control
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[ VII Control ]
Normal operation
During test run mode
Unit in the stopped state