Si18-201 System control
Main Functions 123
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
Heating standby operation
Cooling standby operation
4-way valve
*Command
frequency at power
ON or mode change.
OFF
30Hz
ON
30Hz
Command frequency
62Hz
90sec
90sec
41Hz
Outdoor unit lower fan
775rpm
775rpm
Each room motorized
valve flow rate
715rpm
715rpm
EVP
450 pulses
450 pulses
450 pulses
EVL
0 pulse
EVG
EV
H
EVN
0 pulse
0 pulse
450 pulses
0 pulse
0 pulse
Standby max. time
Guard timer for thermostat
ON prohibition
Timer for suction overheat