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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.
SEG1:
Normally blank, but it displays codes “1~9” accordingly if there is damaged sensor and demand
control requirement.
SEG2:
Normally blank, but it will display code accordingly as below if outdoor unit is running under
limited condition.
SEG3:
It displays outdoor unit’s operation mode.
LED on main control board can display the operating state of outdoor unit (ODU).
State Codes
Description
0
IoT software is updating
1
High pressure sensor fault backup state
2
Low pressure sensor fault backup state
3
Discharge temperature sensor(TD) fault backup state
4
IPM module temperature sensor(TF) fault backup state
5
Ambient temperature sensor(TA) fault backup state
6
Condenser coil sensor(TH) fault backup state
7
Suction temperature sensor(TS) fault backup state
8
Liquid temperature sensor(TL) fault backup state
9
Demand response state
Protection State Codes
Description
0
Running under high pressure limit
1
Running under low pressure limit
2
Running under discharge temperature limit
3
Running under IPM module temperature limit
4
Running under compressor current limit
State Codes
Description
0
Standby without running signal (Y signal=OFF)
1
Ready to start after receiving running signal (Y signal=ON)
*Note
2
Cooling mode
3
Heating mode
4
Oil return
5
Defrost
6
Forced defrost
7
Test mode 7 (high frequency)
8
Test mode 8 (low frequency)
7 segment display instructions
SEG1
SEG2
SEG3
Note: Compressor waits 6 minutes to restart.
14. System operation
14.1 Default display