Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 181

[ VII Control ]
(2) Heating operation
1. Indoor unit fan operation at
Very Low speed
2. Inverter output 0Hz
3. LEVINV fully closed
Indoor unit LEV, LEV6, LEV7 rated
opening
4. Solenoid valve OFF
5. BC controller solenoid valve control
6. BC controller LEV control
HWE15150
Heating operation
4-way valve ON
YES
Test run mode
ON
NO
NO
Thermostat
ON
YES
YES
3-minute restart
prevention
NO
1. Indoor-heat source unit fan control
2. Inverter frequency control
3. Indoor unit LEV, LEVINV, LEV6 control
LEV7 fully closed
4. Solenoid valve control
5. BC controller solenoid valve control
6. BC controller LEV control
- 172 -
Normal operation
Unit in the stopped state
During test run mode
GB