Mitsubishi Electric PQRY-P200YEM-A Service Handbook page 62

(4) Cooling operation
1. Inverter output 0Hz
2. Indoor unit LEV, oil return LEV
(SLEV), INV cooling LEV (LEV2)
fully closed
3. Solenoid valve OFF
4. BC controller solenoid valve OFF
5. BC controller LEV fully closed
Cooling operation
4-way valve OFF
Indoor unit fan
operations
Test run start
NO
NO
Thermostat ON
YES
3-minute
YES
restart
prevention
NO
1. Inverter frequency control
2. Indoor unit LEV, oil return LEV
(SLEV), INV cooling LEV (LEV2)
control
3. Solenoid valve control
4. BC controller solenoid valve control
5. BC controller LEV control
–61–
YES
Normal operations
Test run
Stop