22
Part name Sign Function Data Remark
Compressor /
Capacity control, meet indoor load request by adjusting the frequen-
cy.
ANB66 0.23Ω 20
O
C
Pressure Switch Hs High pressure protection control 4.15Mpa, OFF
Pressure Sensor
Pd
In heating, compressor frequency adjustment, abnormal pressure
protection.
NSK-BD042I-224
Ps
In cooling, compressor frequency adjustment abnormal pressure
protection.
NSK-BD017I-224
Electronic
Expansion Valve
LEVa1/2 Refrigerant flow control when heating 8~12HP:
Φ
2.4
LEVb Sub-cooling valve, in cooling, be controlled as the Tliqsc target. 8-12HP:
Φ
2.4
Solenoid Valve
SV1
1.Meet balance of high/low pressure when compressor starts up or
stops.
AC220V
2A
2.High/low pressure protection.
Open when power is on, close
when power is off
SV18i
Starting auxiliary oil return when the frequency of inverter compres-
sor is high.
When the frequency of inverter
compressor pass 62rps, starts
up, stops when 52rps.
SV10 When equalizing oil, SV10 starts up. AC220V 2A
SV9 When equalizing oil among modules, SV 9 starts up. AC220V 2A
SV3i When Tdi/Toili is high, the inverter compressor starts up. AC220V 2A
SV31 12~16HP outdoor ON/OFF compressor starts up when TD1 is high. AC220V 2A
4-way valve
4WV1 Change over between cooling and heating
AC220V, power on in heating;
power off in cooling or
defrosting
4WV2
When one outdoor unit is operating, 4WV2 can control the heat
exchanger working at a half or full condition.
AC220V, always power on when
heat exchanger works at a half
condition no matter heating or
cooling.
Unloading Valve
DPC Avoid the oil equalization circuit being blocked by liquid seal.
Opened when the circuit’s
pressure is over 4.1MPa
Temp. Sensor
Toili
Detect the refrigerant oil temp. at compressor’s bottom to judge
whether the units operation, oil temp. and oil temp. over-heating
degree meet the standard or not.
R(80
O
C
) = 50K
B(25/80
O
C
) = 4450K
Tdp
Detect the high pressure air pipe’s temp. to judge whether the
diversion in 4WV is success or not.
Tdi/Td1 Detect the temp. of inverter and On-Off compressors’ top
Toilp
Detect the temp. of oil equalization pipe when equalizing the oil if
there are several outdoor units
Tdef1/2
Detect the coil’s temp. of outdoor heat exchanger to judge if it
reaches the defrosting standard
R(25
O
C
) = 10K,
B(25
O
C
/50
O
C
) = 3700 K
Ts/Tsi Detect the compressor’s suction temp.
Tsco
Detect the branch outlet pipe’s temp. of heat regenerator in order to
control LEVb during cooling.
Toci1/2
Detect condenser’s whole air pipe’s temp. to control LEVa1 and
LEVa2 when heating.
Tao
Detect the outdoor temp. to set the original airflow speed and
defrosting condition.
Tliqsc
Detect the main outlet pipe’s temp. of heat regenerator in order to
control LEVb during cooling.
Heater
CHa Apply to heat the liquid refrigerant in the gas-liquid separator 70W,220V, 1 piece
CHi Applied to heat the oil in the inverter compressor 33W,220V, 2 piece
CH1 Applied to heat the oil in On-Off compressor 33W,220V, 1 piece
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