Pre-Equalization Standby Operation - Daikin FTX25JVEA9 Service Manual

Si18-201
3.9

Pre-Equalization Standby Operation

Outline In local air conditioner control mode and frequency fix mode, this function collects surplus
refrigerant in the receiver before the operation mode is changed from cooling or the compressor
stops due to thermostat OFF.
This ensures proper oil level and dilution for the next startup operation.
This function is also activated before cooling operation starts in units that have not completed
the standby operation.
Details
4-way valve
*Command
frequency at power
ON or mode change.
Command frequency
Outdoor unit upper fan
Outdoor unit lower fan
EVP
EVL
EVG
Each room motorized
valve flow rate
Guard timer for thermostat
ON prohibition
Timer for suction overheat
judgement prohibition
Suction overheat judgement
Suction pressure judgement
0
70sec.~2min. judgement
Standby max. time
Main Functions
Cooling standby operation
OFF
30Hz
62Hz
90sec
775rpm
715rpm
450 pulses
450 pulses
0 pulse
0 pulse
60sec
70sec
0
SH ≥ 15 deg
0
LP ≤ 0.098MPa
120sec
Heating standby operation
ON
90sec
0 pulse
EV
H
EV
N
0 pulse
60sec
70sec
SH ≥ 15 deg
LP ≤ 0.098MPa
System control
30Hz
41Hz
775rpm
715rpm
450 pulses
0 pulse
450 pulses
120sec
(M1013)
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