System control Si18-201
112 Main Functions
3.4 Cooling / Heating Standby Operation at Startup
Purpose of the
Function
To prepare for the next startup after operation shutdown and to collect refrigerant into the
receiver in order to prevent liquid refrigerant from returning to the accumulator and compressor
at startup.
Standby Operation
Cooling operation Heating operation
4-way valve
*Command
frequency at power
ON or mode change.
OFF
30Hz
ON
30Hz
Command
frequency
4-way valve
operation security
62Hz
90sec
41Hz
Outdoor unit upper
fan
775rpm
775rpm
Outdoor unit lower
fan
715rpm
715rpm
EVP
450 pulses Fully opened
450 pulses Fully opened
450 pulses Fully opened
EVL
0 pulse Fully closed
EVG
0 pulses Fully closed
450 pulses Fully opened
Each room motorized
valve
0 Nm³/hr Fully closed
0 Nm³/hr Fully closed
Standby max. time
2 min
2 min
Guard timer for thermostat
ON repetition prohibition
1 min
1 min
Timer for suction overheat
judgement prohibition
70sec
70sec
Suction overheat judgement
H
Suction pressure judgement
H
H
70sec.~2min. judgement
SH ≥ 15˚C
LP ≤ 1kg/cm²G
SH ≥ 15˚C
LP ≤ 1kg/cm²G
90 sec
(M1005)
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