Mitsubishi Electric CITY MULTI PQRY-P200YMF-B Service Handbook page 64

(6) Dry operation
1. Indoor unit fan stop
2. Inverter output 0Hz
3. Indoor unit LEV, oil return LEV
(SLEV), INV Cooling LEV (LEV2)
closed
4. Solenoid valve OFF
5. BC controller solenoid valve OFF
6. BC controller LEV fully closed
Note : 1 When indoor unit inlet temperature exceeds 18˚C, heat source unit (compressor) and indoor unit fan start intermittent
operations synchronously. Operations of heat source unit, BC controller, indoor unit LEV and solenoid valve accompanying
compressor are the same as those in cooling operations.
Note : 2 Thermostat is always kept on in test run, and indoor and heat source unit intermittent operation (ON) time is a little longer
than normal operations.
Dry operations
4-way valve OFF
Test run start
NO
NO
Inlet temp. 18˚C
YES
1. Heat source unit (Compressor)
intermittent operations
2. Indoor unit fan intermittent opera-
tions YES
(Synchronized with compressor :
low speed, OFF operations)
–61–
YES
Note : 2
Thermostat ON
Note : 1
Normal operations
Thermostat ON
Stop