Mitsubishi Electric PUHY-200YMF-B Service Handbook page 74

(4) Cooling operation
1. Inverter output 0Hz
2. Indoor unit LEV, oil return LEV,
Subcool coil bypass LEV fully
closed
3. Solenoid valve OFF
4. Outdoor unit fan stop
5. BC controller solenoid valve OFF
(PURY)
6. BC controller LEV fully closed
(PURY)
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
control
3. Solenoid valve control
4. Outdoor unit fan control
5. BC controller solenoid valve control
(PURY)
6. BC controller LEV control (PURY)
–72–
YES
Normal operations
Test run
Stop