Daikin FH45BZV1 [182/397] Functions of thermistors small heat pumps

Daikin FUYP125BV1 [182/397] Functions of thermistors small heat pumps
General Functionality ESiEN02–01A
2–4 Part 2 Functional Description
3
1
2
4
5
1.2 Functions of Thermistors: Small Heat Pumps
Locating the
thermistors
The thermistors on the illustration below are used to control the system. This control secures a proper
operation and prevents problems of the unit.
Functions of the
thermistors
The table below contains the functions of the small h/p.
1
2
3
4
Outdoor unit
Indoor unit
Ther-
mistor
Location
Wiring
symbol
Mode Function
1 Indoor heat
exchanger
R2T Cooling Freeze-up thermostat
Heating
Hot start indoor fan
Peak cut-off
2 Indoor air
return
R1T Cooling Thermostat control
Heating Thermostat control
3 Outdoor heat
exchanger
R2T Cooling Not used
Heating
Frost prevention and overload prevention
Defrost initiation and termination
4 Outdoor air
return
R1T Cooling Low ambient control
Heating
Frost prevention
Defrost initiation

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