9
Part name Sign Function Date Note
Compressor /
Capacity control, meet indoor load
request by adjusting frequency and
opening and closing fixing frequency
compressor.
20°C
Pressure switch HPS High pressure protection 4.15Mpa, OFF
Electronic
expansion valve
EEV In heating, refrigerant flow control Φ3.0
Solenoid valve SV1
1. Keep balance of high/low pressure
when compressor starts up and stops
2. High/low pressure protection
AC220V
Open when power is on,
close when power is off.
2A
4-way valve 4WV
Changing over between cooling and
heating
AC220V electrified in
heating; powered off in
cooling or defrosting.
Pressure sensor
Pd
In heating, compressor frequency
adjustment, abnormal pressure
protection
Ps
In cooling, compressor frequency
adjustment, abnormal pressure
protection
Temp. sensor
Td Detect the top temp. of compressor
R(80°C)=50K
B(25/80°C)=4450K
Ts Detect the top suction of compressor
R(80°C)=10K
B(25/80°C)=3700K
Ta
Detect ambient temp., set primary fan
speed and control defrost condition
Tc1
Detect the temp. of before and after
the supercooling valve to control the
supercooling valve open angle.
Tc2
Te
Detect frost condition of outdoor heat
exchanger
Heater Chi Used to heat oil in inverter compressor 28W, 220V, one
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