–55–
YES
NO
YES
YES
NO
(6)
Dry operation
Normal operations
Thermostat ON
Stop
1. Indoor unit fan stop
2. Inverter output 0Hz
3. Indoor unit LEV, oil return LEV
closed
4. Solenoid valve OFF
5. Outdoor unit fan stop
6. BC controller solenoid valve OFF
7. BC controller LEV fully closed
1. Outdoor unit (Compressor) intermit-
tent operations
2. Indoor unit fan intermittent opera-
tions
(Synchronized with compressor :
low speed, OFF operations)
Dry operations
4-way valve OFF
Inlet temp. 18˚C
Note : 2
Thermostat ON
Test run start
Note : 1
Note : 1
When indoor unit inlet temperature exceeds 18˚C, outdoor unit (compressor) and indoor unit fan start intermittent operations
synchronously. Operations of outdoor 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 outdoor unit intermittent operation (ON) time is a little longer than
normal operations.
