Mitsubishi Electric PQHY-P72ZLMU-A Service Handbook page 182

[ VII Control ]
(3) Dry operation
1. Indoor unit fan stop
2. Inverter output 0Hz
3. Indoor unit LEV, LEVINV
fully closed.
LEV6, LEV7 rated opening
4. Solenoid valve OFF
5. BC controller Solenoid valve OFF
6. BC controller
*Note 1.When the indoor unit inlet temperature exceeds 18 C [64 F], the heat source unit (compressor) and the
indoor unit fan start the intermittent operation simultaneously. When the indoor unit inlet temperature
becomes 18 C [64 F],or less, the fan always runs (at low speed). The heat source unit, the indoor unit,
and the solenoid valve operate in the same way as they do in the cooling operation when the compressor
is turned on.
*Note 2.Thermostat is always kept on during test run mode, and indoor and heat source unit intermittent operation
(ON) time is a little longer than that of normal operation.
HWE15150
Dry operation
4-way valve OFF
Test run mode
ON
NO
Suction temperature
18 C[64 F]
1. Heat source unit (compressor)
intermittent operation
2. Indoor unit fan intermittent operations
(Synchronized with the compressor:
low speed, OFF operations)
LEV fully closed
1
- 173 - 173
YES
*Note 2
NO
Thermostat ON
YES
*Note 1
2
Normal operation
Thermostat ON
Unit in the stopped state
GB