Ecoer 2436 - Major Components and Refrigerant Flow; Refrigerant Circuit

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05.2018 Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
ESI Outdoor Unit Function and control
1.1 Refrigerant Circuit
1. Major components function and refrigerant flow
HP
TD
EEV
INV
TH
TA
ST1
TS
TL
ACC
Liquid Stop Valve
Heat Exchanger
Gas Stop Valve
Gauge Port
FAN
LP
Name
Symbol
Function
Inverter compressor INV
Adjusts refrigerant flow rate by changing the frequency based on
objective pressure.
Inverter fan FAN
Outputs heat exchanger capacity by adjusting rotation speed based on
operating pressure.
Electronic expansion
valve
EEV
1) Fully open during cooling mode and defrost operation.
2) Control discharge superheat in heating mode.
4-way valve ST1
Switches the operation mode between heating and cooling (including
defrost control).
Thermistor
TH Uses to control defrosting during heating operation.
TA Uses to detect outdoor air temperature and control fan speed.
TS
Uses to detect suction temperature and calculate suction superheat
(SH).
TL Uses to detect liquid pipe temperature and calculate sub-cooling (SC).
TD
Uses to detect discharge temperature and calculate discharge
superheat
(DSH).
TF Uses to detect heat sink temperature of inverter module.
High pressure sensor HP Uses to detect high pressure.
Low pressure sensor LP Uses to detect low pressure.
Accumulator ACC Uses to store excess refrigerant.