Standby Control; Restart Standby; Crankcase Heater Control - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3. Standby Control

3.1

Restart Standby

Used to forcedly stop the compressor for a period of 2 minutes, in order to prevent the frequent
ON/OFF of the compressor and equalize the pressure within the refrigerant system.
In addition, the outdoor fan carry out the residual operation for a while to accelerate pressure
equalizing and to suppress migration of the refrigerant to the evaporator.
3.2

Crankcase Heater Control

In order to prevent the refrigerant from migrating into the compressor oil in the stopped mode, this
mode is used to control the crankcase heater.
Part 4 Functions and Control
temperature < 70˚C (158 ˚F)
Crankcase heater
OFF
temperature > 75˚C (167 ˚F)
Discharge pipe
Discharge pipe
Standby Control
Crankcase heater
ON
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