M thermal Mono
28
202008
Midea
M
ther
ma
l Mo
no
Se
rvice M
an
ual
7
Role of Temperature Sensors in Control Functions
Figure 3-7.1: Location of the temperature sensors on
6
~16KW unit systems
Notes:
1. The names and functions of the temperature sensors labelled 1 to 12 in this figure are detailed in
Table 3-6.1.
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Midea CAC Confidential
M thermal Mono
202008
29
Part
3
- Con
trol
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 control2
Discharge superheat control
Cooling
Electronic expansion valve control2
Outdoor fan control3
Discharge superheat control
2
Outdoor ambient temperature
sensor
T4
Heating
Compressor startup control4
Compressor output control5
Electronic expansion valve control2
Defrosting operation control7
Low pressure protection control7
Crankcase heater control9
Cooling
Compressor startup control4
Compressor output control5
Electronic expansion valve control2
Outdoor fan control3
Crankcase heater control9
3
Air side heat exchanger
refrigerant outlet temperature
sensor
T3
Heating
Electronic expansion valve control2
Defrosting operation control7
Outdoor fan control3
Cooling
Compressor output control5
Outdoor fan control3
4
Water side heat exchanger
refrigerant inlet (liquid pipe)
temperature sensor
T2
Heating
Compressor output control5
DHW
5
Water side heat exchanger
refrigerant outlet (gas pipe)
temperature sensor
T2B
Heating
Freeze prevention control10
6
Suction pipe temperature
sensor
Th
Heating
Electronic expansion valve control2
Cooling
7
Water side heat exchanger
water inlet temperature
sensor
Tw_in
Heating
Freeze prevention control10
Cooling
8
Water side heat exchanger
water outlet temperature
sensor
Tw_out
Heating
Compressor output5 and on/off control6
Freeze prevention control10
Cooling
DHW
9
Backup electric heater water
outlet temperature sensor
T1
Heating
Compressor output control5
Backup electric heater control
DHW priority control11
Auto mode control
Cooling
Compressor output5 and on/off control6
Auto mode control
DHW
Compressor output control5
Backup electric heater control
DHW priority control11
10
Circuit 2 water outlet
temperature sensor
T1B
Heating
Mixing valve control
11
Room temperature sensor
Built in wire controller
Ta
Heating
Auto mode control
Climate related curve
Compressor output control5
Cooling
12
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 control5
DHW priority control11
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, 3 “Startup Control”.
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, 2.2 “Freeze Prevention Control”.
11. Refer to Part 3, 6.4 “Fast DHW Operation”.
Midea CAC Confidential
Mono
Summary of Contents for 06RY1
Page 1: ...SERVICEMANUAL MONO TYPE HEAT PUMP R32...
Page 2: ...Mono...
Page 4: ...M thermal Mono 2 202008 Midea M thermal Mono Service Manual Midea CAC Confidential Mono...
Page 16: ...M thermal Mono 14 202008 Midea M thermal Mono Service Manual Midea CAC Confidential Mono...
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