Function Of Thermistor - Daikin 3MKS50E3V1B Service Manual

SiBE121135

3. Function of Thermistor

Cooling Only Model
(1)
(2)
Compressor
Heat Pump Model
(1)
Four way valve
(2)
Compressor
(1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe
Exchanger
Thermistor
2. In cooling operation, the outdoor heat exchanger thermistor is used for detecting the
3. In cooling operation, the outdoor heat exchanger thermistor is used for high pressure
Function and Control
Illustrations are for 4-room models as representative and have 4 lines of indoor unit system
(A ~ D). 3-room models have 3 lines (A ~ C) and 5-room models have 5 lines (A ~ E).
Outdoor electronic
expansion valve
EVA
EVB
EVC
EVD
(3)
Outdoor electronic
expansion valve
EVA
EVB
EVC
EVD
(3)
temperature. The system sets the target discharge pipe temperature according to the
outdoor and indoor heat exchanger temperature, and controls the outdoor electronic
expansion valve opening so that the target discharge pipe temperature can be obtained.
disconnection of the discharge pipe thermistor. When the discharge pipe temperature
becomes lower than the outdoor heat exchanger temperature, the discharge pipe thermistor
is judged as disconnected.
protection.
D C B A
(4)
(R17248)
A: In case of FVXG model
(5)
Indoor electronic
expansion valve
(Motor operated
D C B
valve)
Radiant panel
(4)

Function of Thermistor

(6) φ 4
(4)
(6) φ 6
(R17159)
105