Cooling Only Model - Daikin Super Multi NX C-Series Service Manual

Function of Main Structural Parts

2.2.2 Cooling Only Model

A
B
A Outdoor Heat
1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature.
Exchanger
Thermistor (DCB)
2. When cooling: an outdoor heat exchanger thermistor is used for detecting a disconnected
B Discharge 1. Discharge pipe thermistor is used to control a discharge pipe.
Pipe Thermistor
(DOT)
2. A discharge pipe thermistor is used for detecting a disconnected discharge pipe thermistor.
C Gas Pipe 1. When cooling: a gas pipe thermistor is used for gas pipe isothermal control.
Thermistor (DGN)
86
Compressor
1
Set a target discharge temperature depending on an outdoor and indoor heat exchanger
temperature.
Control the electronic expansion valve opening so that the target discharge temperature can
be obtained.
discharge pipe thermistor.
When the temperature of the discharge piping is lower than the temperature of outdoor heat
exchanger, a disconnected discharge pipe thermistor can be detected.
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.
Control electronic expansion valve opening so that a gas pipe temperature in each room
becomes equal.
Expansion valve
4
EV
A
EV
B
EV
C
EV
D
C
SiE12-411
D
(R2436)
Function and Control