Warm-Up Function - Daikin FTX25JVEA9 Service Manual

Si18-201
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
(1) When preheat permit command is issued (EEPROM constant)
(2) When no preheat permit command is issued (EEPROM constant)
(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)
(2) When no preheat permit command is issued (EEPROM constant)
(3) Relay MRM1 turns off
(4) Inverter stops operating in open-phase mode
Preheat permission : Yes
12˚C
10.5˚C
Main Functions
When the stop mode remains for 63 minutes or more and when the capacitor is not
discharging
Outside temperature DOA < DOAY1
Discharge temperature DO < DOY1
Outside temperature DOA < DOAYS1
Discharge temperature DO < DOYS1
When conditions and
Outside temperature DOA > DOAY2 + DOAY1
Discharge temperature DO > DOY2 + DOY1
Outside temperature DOA > DOAYS2 + DOAYS1
Discharge temperature DO > DOYS2 + DOYS2
When condition or in (1) is met or when condition
OFF
ON
10.5 12
Outdoor air temp.
in (1) are met or when conditions
Preheat permission : No
3˚C
1˚C
(M1030)
System control
and in (2) are met
or in (2) is met
OFF
ON
-3
-5˚C
Outdoor air temp.
(M1031)
141