Daikin J Series Service Manual Page 106

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SiE18-201 System control
Main Functions 95
3.23 Warm-Up Function
Outline This function operates the inverter in a open-phase mode to warm up the compressor when it
receives a warm-up command under certain outdoor air temperature and discharge pipe
temperature conditions.
Details 1. Preheat conditions
When the stop mode remains for 63 minutes or more and when the capacitor is not
discharging
(1) When preheat permit command is issued (EEPROM constant)
Outside temperature DOA < DOAY1
Discharge temperature DO < DOY1
(2) When no preheat permit command is issued (EEPROM constant)
Outside temperature DOA < DOAYS1
Discharge temperature DO < DOYS1
When conditions and in (1) are met or when conditions and in (2) are met
(3) Relay MRM1 turns on
(4) Inverter starts operation in open-phase mode
2. Cancellation conditions
(1) When preheat permit command is issued (EEPROM constant)
Outside temperature DOA > DOAY2 + DOAY1
Discharge temperature DO > DOY2 + DOY1
(2) When no preheat permit command is issued (EEPROM constant)
Outside temperature DOA > DOAYS2 + DOAYS1
Discharge temperature DO > DOYS2 + DOYS2
When condition or in (1) is met or when condition or in (2) is met
(3) Relay MRM1 turns off
(4) Inverter stops operating in open-phase mode
Preheat permission : Yes
Discharge pipe temp.
12˚C
10.5˚C
OFF
ON
10.5
Outdoor air temp.
12
(M1030)
Preheat permission : No
Discharge pipe temp.
3˚C
1˚C
OFF
ON
-5˚C
Outdoor air temp.
-3
(M1031)
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