Control Specification Of R60D Model; Function Of Thermistor - Daikin D Series Service Manual

Si01-501

3. Control Specification of R60D Model

3.1

Function of Thermistor

A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature.
Exchanger
Thermistor (DCB)
2. When cooling: an outdoor heat exchanger thermistor is used for detecting the discharge
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.
C Indoor Heat 1. The indoor heat exchanger thermistor is used for controlling target discharge pipe
Exchanger
Thermistor (DCN)
2. The indoor heat exchanger thermistor is used to prevent freezing.
Defails of Functions
A
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.
thermistor disconnected.
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.
temperature.
Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger
temperature.
Control the electronic expansion valve opening so that the target discharge pipe
temperature can be obtained.
During the cooling operation, if the temperature drops abnormally, the operating frequency
becomes lower, then the operation must be halted.

Control Specification of R60D Model

Electrontic
expansion valve
C
Compressor
(R2828)
39