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ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
14.4 Control logic description
14.4.1 Operation Mode
Operation in stop
mode
Pressure
equalizing prior to
start up
Thermostat ON
(Y=ON)
Thermostat OFF
Startup control*1
・
Cooling startup
(O=ON)
・
Heating startup
(O=OFF)
Outdoor unit
rotation
Cooling or heating
operation
Oil return
IN conditions
are met.
Defrost
IN conditions
are met.
NO
NO
Oil return operation*1
YES
Defrost operation*1
YES
Outdoor unit
rotation
Normal operation
・
Compressor PI control
・
EEV PI control
・
Fan motor control
・
Protection control
Restart standby
(compressor stops)
Malfunction
/Thermostat OFF
/O be changed
Malfunction
/Thermostat OFF
/O be changed
Y=OFF
O be changed
or
Longest 6 minutes
after 1 minute
*1 If Y or O signal is changed during the process, the system may be forced to complete it
under some conditions.