Airwell VVFA Series Service Manual page 11

Part name
Compressor
Pressure switch
Electronic
expansion valve
Solenoid valve
4-way valve
Pressure sensor
Temp. sensor
Heater
Sign
Capacity control, meet indoor load
request by adjusting frequency and
/
opening and closing fixing frequency
compressor.
HPS High pressure protection
In heating, refrigerant flow control
EEV
(subcooling valve)
1. Keep balance of high/low pressure
SV1 when compressor starts up and stops
2. High/low pressure protection
Changing over between cooling and
4WV
heating
In heating, compressor frequency
PD adjustment, abnormal pressure
protection
In cooling, compressor frequency
PS adjustment, abnormal pressure
protection
TD Detect the top temp. of compressor
TS Detect the top suction of compressor
Detect ambient temp., set primary fan
TA
speed and control defrost condition
TX1
Detect the temp. of before and after
the supercooling valve to control the
supercooling valve open angle.
TX2
Detect frost condition of outdoor heat
TE(1)
exchanger
Chi Used to heat oil in inverter compressor 28W, 220V, one
Function
9
Date
4.15Mpa, OFF
Φ3.0
AC220V
Open when power is on,
close when power is off.
AC220V electrified in
heating; powered off in
cooling or defrosting.
R(80°C)=50K
B(25/80°C)=4450K
R(80°C)=10K
B(25/80°C)=3700K
Note
20°C
2A