Standby - Daikin ERQ Series Service Manual

Special Control
3.5

Standby

3.5.1 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) (ERQ 125 A7W1B model)
Ending conditions
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
34
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
ESiEN09-06 A
Function