Standby - Daikin VRV III RXYQ5-54PY1 Service Manual

Si34-601A
3.6

Standby

3.6.1 Restart Standby
Used to forcedly stop the compressor for a period of 3 minutes, in order to prevent the frequent ON/OFF of the
compressor and equalize the pressure within the refrigerant system.
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized (EV2)
Hot gas bypass valve (SVP)
Accumulator oil return valve (SVO)
Injection (SVT) (RXYQ5P model)
Ending conditions
* Actuators are based on RXYQ14~18P.
3.6.2 Crankcase Heater Control
In order to prevent the refrigerant from melting in the compressor oil in the stopped mode, this mode is used to control
the crankcase heater.
Crankcase heater
Function
Actuator
Discharge pipe
temperature < 70 ˚C
OFF
Discharge pipe
temperature > 75 ˚C
Operation
OFF
Ta>30°C: STEP4
Ta≤30°C: OFF
Holds
0 pls
0 pls
OFF
OFF
OFF
3 min.
Crankcase heater
ON
Special Control
115