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General Functions
SiBE04-101
18
Main Function
1. General Functions
1.1
Functions of Thermistors
Location of the
Thermistors
The thermistors on the drawing below are used to control the system. This control secures a proper cooling
and prevents problems of the unit:
Frequency Control
The following table shows the thermistors that control the frequency:
with
: available functions and — : no available functions.
OUTDOOR UNIT
M
COOLING
HEATING
FIELD PIPING
FIELD PIPING
R1T
DOT
R2T
INDOOR UNIT
R1T
R2T
M
(R1164)
Controls
Outdoor heat
exchanger
thermistor
Outdoor
ambient
temperature
thermistor
Indoor
ambient
temperature
thermistor
Indoor heat
exchanger
thermistor
Discharge
pipe
temperature
thermistor
Symbol
R2T
R1T
R1T
R2T
DOT
Freeze-up prevention. Refer to
page 36.
—
—
—
—
Peak cut. Refer to page 37.
—
—
—
—
Defrost. Refer to page 21.
—
—
Input current control. Refer to
page 35.
—
—
—
—
Dew prevention. Refer to page
42.
—
—
—
Low outdoor temperature
frequency control.
—
—
—
—
Discharge pipe temperature
control.
—
—
—
—
SiBE04-101.book Page 18 Monday, October 15, 2001 3:08 PM