Standby - Daikin VRV III REYQ8PY1 Service Manual

Special Control
3.6

Standby

3.6.1 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.
Actuator
Compressor1
Compressor2
Compressor3
Outdoor unit fan1
Outdoor unit fan2
Electronic expansion valve
(Main)
Electronic expansion valve
(Supercooling)
Electronic expansion valve
(Refrigerant charge)
Four way valve (Heat
exchanger switch)
Four way valve (High/low
pressure gas pipe switch)
Solenoid valve (Main bypass) SVE
Solenoid valve (Hot gas)
Solenoid valve (Refrigerant
regulator liquid pipe )
Solenoid valve (Refrigerant
regulator gas vent pipe)
Solenoid valve (Refrigerant
regulator exhaust pipe)
Solenoid valve (Refrigerant
regulator discharge pipe)
Ending conditions
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
122
Elect.
symbol
Symbol
REYQ8~16P
REYQ REMQ
— M1C M1C
— M2C M2C
— M3C M3C
Ta>30°C: STEP4
— MF1 MF1
Ta≤30°C: OFF
Ta>30°C: STEP4
— MF2 MF2
Ta≤30°C: OFF
Y1E
EVM Y1E
Y3E
Y2E
EVT Y3E
Y5E
EVJ Y4E Y2E
Y2S
20SA Y3S
Y9S
20SB Y8S Y2S
Y5S
Y6S
Y10S
SVP Y4S Y5S
SVL Y3S Y4S
SVG Y1S Y1S
SVO Y7S Y7S
SVT Y6S Y8S
—
Discharge pipe
temperature < 70 ˚C
OFF
Discharge pipe
temperature > 75 ˚C
Operation
REMQ8P
OFF OFF
OFF —
— —
Ta>30°C: STEP4
Ta≤30°C: OFF
—
Crankcase heater
REMQ10•12P REMQ14•16P
OFF
OFF
—
Ta>30°C: STEP4 Ta>30°C: STEP4
Ta≤30°C: OFF Ta≤30°C: OFF
Ta>30°C: STEP4
—
Ta≤30°C: OFF
0 pls
0 pls
80 pls
Holds
Holds
OFF
OFF
OFF
OFF
OFF
OFF
2 min.
ON
Si37-701
OFF
OFF
OFF
Function