Discharge Pipe Temperature Control - Daikin CTXU25G2V1B Service Manual

SiBE12-908
3.4.5 Compressor Protection Function
When turning the compressor from OFF to ON, the upper limit of frequency must be set as
follows. (The function must not be used when defrosting.)
3.5

Discharge Pipe Temperature Control

Outline The discharge pipe temperature is used as the compressor's internal temperature. If the
discharge pipe temperature rises above a certain level, the operating frequency upper limit is
set to keep this temperature from going up further.
Detail Divide the Zone
Management within the Zones
Function and Control
40 class 50 class
FCG 1 62 55
FCG 2 72 70
FCG 3 90 85
TCG 1 140 150
TCG 2 180 180
TCG 3 300 300
Stop
Drooping
Zone
Stop zone
Drooping zone
Keep zone
Return / Reset zone
(Hz)
Frequency
FCG3
FCG2
FCG1
Keep
Up
Return
When the temperature reaches the stop zone, stop the compressor and
correct abnormality.
Start the timer, and the frequency is drooping.
Keep the upper limit of frequency.
Cancel the upper limit of frequency.
Control Specification
TCG3
TCG1 TCG2
40 class 50 class
A 110
A°C
B 103
B°C
C 102
C°C
D 101
D°C
E 97
E°C
(R10341)
Control contents
(sec)
Time
110
103
102
100
95
44