Outdoor Unit (25/35 Class); Function Of Thermistor - Daikin Sky Air B-Series R-410A Service Manual

Outdoor Unit (25/35 class)

2. Outdoor Unit (25/35 class)

2.1

Function of Thermistor

2.1.1 Heat Pump Model
A Outdoor Heat
1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature.
Exchanger
Thermistor (DCB)
2. The outdoor heat exchanger thermistor is used for detecting the discharge thermistor
3. The outdoor heat exchanger thermistor is used for high pressure protection during cooling
B Discharge 1. The discharge pipe thermistor is used to control the discharge pipe.
Pipe Thermistor
(DOT)
2. The discharge pipe thermistor is used for detecting the discharge thermistor disconnected.
86
A
Four way valve
Compressor
B
Set a target discharge temperature depending on the outdoor and indoor heat exchanger
temperature.
Control the electronic expansion valve opening so that the target discharge temperature can
be obtained.
disconnected when cooling.
When the temperature of the discharge piping is lower than the temperature of outdoor heat
exchanger, a disconnected discharge thermistor can be detected.
operation.
If the temperature of discharge pipe (used in place of the inner temperature of the
compressor) rises abnormally, the operating frequency drops or the operation must be
halted.
Electrontic
expansion valve
(R3077)
Si21-205
Function and Control