Pump Down Operation - Daikin FTX25JVEA9 Service Manual

System control
3.39

Pump Down Operation

Outline When the Pump-down button is pressed, the following control is provided to collect refrigerant in
the receiver.
Details
4-way valve
Command frequency
Outdoor unit upper fan
Outdoor unit lower fan
EVP
EVL
EVG
Each room motorized valve
BP bypass motorized valve
168
ON
OFF
45Hz
775rpm
715rpm
450 pulses
450 pulses
0 pulse
450 pulses
450 pulses
Max. 5 min.
or
LP < 1.5 kg /cm²
or
Suction superheat degree (SHS) > 10˚C
30 Hz
0 pulse
0 pulse
Max. 3 min.
or
LP < 0.5 kg/cm²
Main Functions
Si18-201
450 pulses
450 pulses
1.5min
(M1052)