Midea MHC - V18W/D2RN8 - Page 24

M thermal Mono
202008 23
Part 3
-
Control
Table 3-7.1: Names and functions of the temperature sensors
Number Sensor name
1
Sensor code Mode Control functions
1 Discharge pipe temperature sensor Tp
Heating
Electronic expansion valve control
2
Discharge
super
heat control
Cooling
Electronic e
xpansion valve control
2
Outdoor fan control
3
Discharge
super
heat control
2 Outdoor ambient temperature sensor T4
Heating
Compressor s
tart
up
control
4
Compressor output control
5
Electronic expansion valve control
2
Defrosting operation control
7
Low pressure protection control
7
Crankcase heater
control
9
Cooling
Compressor s
tart
up
control
4
Compressor output control
5
Electronic expansion valve control
2
Outdoor fan control
3
Crankcase heater control
9
3
Air side heat exchanger refrigerant outlet
temperature sensor
T3
Heating
Electronic expansion valve control
2
Defrosting operation control
7
Outdoor fan control
3
Cooling
Compressor output control
5
Outdoor fan control
3
4
Water side heat exchanger refrigerant inlet
(liquid pipe) temperature sensor
T2
Heating
Compressor output control
5
DHW
5
Water side heat exchanger
refrigerant outlet
(gas pipe) temperature
sensor
T2B Heating Freeze prevention control
10
6 Suction pipe temperature sensor Th
Heating
Electronic expansion valve control
2
Cooling
7
Water side heat exchanger water inlet
temperature sensor
Tw_in
Heating
Freeze prevention control
10
Cooling
8
Water side heat exchanger water outlet
temperature sensor
Tw_out
Heating
Compressor output5 and on/off control
6
Freeze prevention control
10
Cooling
DHW
9 Final water outlet temperature sensor T1
Heating
Compressor output control
5
Backup electric heater control
DHW priority control
11
Auto mode control
Cooling
Compressor output5 and on/off control
6
Auto mode control
DHW
Compressor output control
5
Backup electric heater control
DHW priority
control
11
10 Domestic hot water tank temperature sensor T5 DHW
Disinfection operation control
DHW tank immersion heater control
Backup electric heater control
Auxiliary heat source control
Solar energy kit control
Compressor output control
5
DHW priority
control
11
11
Room temperature sensor (built in wired
controller)
Ta
Heating
Auto mode control
Climate related curve
Compressor
output control
5
Cooling
Notes:
1. Sensor names in this service manual referring
to refrigerant flow is
named according refrigerant flow during cooling operation
refer to
Part 2, 3 Refrigerant Flow Diagrams .
2. Refer to Part 3, 4.5 Electronic Expansion Valve Control .
3. Refer to Part 3, 4.6 Outdoor Fan Control .
4. Refer to Part 3, 2 Compressor Startup Program .
5. Refer to Part 3, 4.2 Compressor Output Control .
6. Refer to Part 3, 1 Stop Operation .
7. Refer to Part 3, 6.2 Defrosting Operation .
8. Refer to Part 3, 5.2 Low Pressure Protection Control .
9. Refer to Part 3, 2.1 Crankcase Heater Control .
10. Refer to Part 3, 5.7 Water Side Heat Exchanger Anti-freeze Protection
C .
11. Refer to Part 3, 6.3 Fast DHW Operation .
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