Si-95 Functions
Functions Inverter K Series 23
1.9 Pressure Equalization Control
The discharge gas and suction gas pipes are bypassed to eliminate differential pressure between the inlet
and outlet of the solenoid valve during BS unit’s solenoid switching operations.
■ Equalizing operation demand → Pressure equalization solenoid valve (Y1S) is ON at following
conditions.
&
Operating condition of indoor unit with thermostat ON is different from the condition of BS unit’s solenoid
valve (see page 25).
Not in startup control.
Liquid refrigerant not being discharged from accumulator.
Not in residual pump-down operation.
7 minutes passed after completion of previous pressure equalizing control operation.
Not in oil return control
Not in defrost operation
SI-95.BOOK Page 23 Friday, March 31, 2000 10:59 AM
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