Haier MRV 5-RC VP1-112B Service Manual page 59

Part name Sign
Compressor /
Pressure switch HPs1/2
Pd1
Pressure sensor
Ps
LEVa1, 2 Refrigerant flow control in heating
Electronic
expansion
valve
LEVb
SV1
SV3
Solenoid valve
SV10
SV9
4WV1
4WV2
Four-way valve
4WV3
Unloading valve DPC
Toil1/2
Tsacc
Td1/Td2
Tdef1
Tdef2
Toci1
Temperature
Toci2
sensor
Tao
Tsco
Tliqsc
CH1/2
Function
"Capacity control, to meet indoor load through
frequency adjustment."
Protection control for high pressure
In heating , compressor frequency adjustment and
protection control for abnormal pressure
In cooling , compressor frequency adjustment and
protection control for abnormal pressure
Sub-cooling valve, in cooling, be controlled as the
Tliqsc target.
1. Balance between high and low pressures when the
compressor starts and stops;
2. Protection to prevent high and low pressures.
Started when the compressor discharging
temperature and oil temperature are too high to carry
out temperature reduction by refrigerant spraying.
Outdoor unit SV10 for oil suction starts during oil
balance; for pressure relief to prevent explosion of
pipe group.
The outdoor unit for oil discharging starts SV9 for oil
balancing during oil balance among modules.
Switch between cooling and heating
Switch between cooling and heating
Change over between cooling and heating
Avoid the oil equalization circuit being blocked by
liquid seal.
To detect the temperature of refrigeration lubricant at
the compressor bottom.
To detect the inlet temperature of gas-liquied
seperator
To detect the top temperature of inverter/ON-OFF
compressor.
To detect the frosting of outdoor heat exchanger.
To detect the temperature of condenser main gas
pipe to control LEVa1, 2 during heating.
To detect ambient temperature and control the initial
air speed and defrosting conditions.
Detect the branch outlet pipe's temp. of heat
regenerator in order to control LEVb during cooling.
Detect the main outlet pipe's temp. of heat
regenerator in order to control LEVb during cooling.
Used to heat the compressor oil in the inverter
compressor.
56
Data Remark
ANB52FKQMT:
0.302Ω
20°C
ANB66FVAMT: 0,23Ω
ANB78FVAMT: 0,23Ω
4.15Mpa, OFF setting
0~4.15MPa
0~1.7MPa
8-14HP:Ø3.0
16-22HP:Ø4.0
8-22HP:Ø2.5
AC220V 2A
AC220V 2A
AC220V 2A
AC220V 2A
AC220V Power on
during heating and
power off during
cooling or defrosting.
AC220V, power on in
heating; power off in
cooling or defrosting
Opened when the
circuit's pressure is
over 4.1MPa
"R (80°C ) = 50K
B (25/80°C )=4450K
R(25°C )=10K,
B(25°C /50°C ) =3700
K
33W, 220V, 2 pieces/
compressor