Service Manual

SiUS281811E Special Control
Part 4 Functions and Control 85
3.5 Restart Standby
Restart is forced into standby to prevent the power from frequently turning on and off and to
equalize pressure in the refrigerant system.
Ta: Outdoor air temperature
3.6 Stop Control
Actuator operation is cleared when the system is down.
Outdoor unit
actuator
Electric Symbol
Operation
18/24 class 30/36/42/48 class
Compressor M1C M1C OFF
Outdoor fan M1F M1F
M2F
Ta > 30°C (86°F): STEP 4
Ta ≤ 30°C (86°F): OFF
Main electronic
expansion valve
Y1E Y1E 0 pulse
Subcooling electronic
expansion valve
— Y3E 0 pulse
Four way valve Y1S Y1S Holds
Hot gas bypass valve Y2S — OFF
Ending conditions 2 minutes
Outdoor unit
actuator
Electric Symbol
Operation
18/24 class 30/36/42/48 class
Compressor M1C M1C OFF
Outdoor fan M1F M1F
M2F
OFF
Main electronic
expansion valve
Y1E Y1E 0 pulse
Subcooling electronic
expansion valve
— Y3E 0 pulse
Four way valve Y1S Y1S Holds
Hot gas bypass valve Y2S — OFF
Ending conditions Indoor unit thermostat is turned ON.