Operations In Each Mode; Cooling Operation - Mitsubishi Electric PU(H)Y-P250YGM-A Service Handbook

[ VII Control ]

2. Operations in each mode

(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. 52C 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
Cooling operation
4-way valve OFF
Indoor unit fan
*Note 1
operation
YES
Test run mode
ON
NO
NO
Thermostat ON
*Note 2
YES
YES
3-minute restart
prevention
NO
1. Inverter frequency control
2. Indoor unit LEV, LEV1
control
3. Solenoid valve control
4. Outdoor unit fan control
5. 52C control
- 94 -
Normal operation
During test run mode
Unit in the stopped state