Standby - Daikin VRV II RXYQ5MATL Service Manual

Special Control
3.5

Standby

3.5.1 Restart Standby
Used to forcedly stop the compressor for a period of five minutes, in order to prevent the frequent ON/OFF of the
compressor and equalize the pressure within the refrigerant system.
Actuator
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Receiver gas discharging valve (SVG)
Non-operating unit liquid pipe stop
valve (SVSL)
Ending conditions
* Actuators are based on RXYQ16MA.
3.5.2 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
82
OFF
Ta>30°C: STEP4
Ta≤30°C: OFF
Holds
0 pls
0 pls
OFF
OFF
ON
5 min.
Discharge pipe
temperature < 70
OFF
Discharge pipe
temperature > 75
Operation
˚C
Crankcase heater
˚C
Remarks





In the case of RXYQ5MA, this valve
turns ON.



ON
Si39-504
Function