General Functionality; Functions Of Thermistors - Daikin FTK25JVE9 Service Manual

General Functionality

1. General Functionality

1.1

Functions of Thermistors

Location of The thermistors on the drawing below are used to control the system. This control secures a
proper cooling and prevents problems of the unit:
thermistors
OUTDOOR UNIT
R1T
M
Frequency The following table shows the thermistors that control the frequency:
control
Controls
Symbol
Freeze-up prevention.
Refer to page 19.
Peak cut off. Refer to page
19.
Defrost. Refer to page 23.
High pressure limitation in
heating. Refer to page 19.
with # : available functions and — : no available functions.
18
R2T
COOLING
HEATING
Outdoor heat
exchanger
thermistor
FIELD PIPING
FIELD PIPING
Outdoor
ambient
temperature
thermistor
R2T R1T
— —
— —
# #
#
—
Si04-115
INDOOR UNIT
R1T
R2T
M
Indoor ambient Indoor heat
temperature exchanger
thermistor thermistor
R1T R2T
#
—
#
—
#
—
#
—
Main Function
(R1899)