Compressor Protection Function; Discharge Pipe Temperature Control - Daikin Super multi NX E Series Service Manual

Control Specification

4.3.5 Compressor Protection Function

When turning the compressor from OFF to ON, the upper limit of frequency is set as follows.
(The function is not used when defrosting.)
4.4

Discharge Pipe Temperature Control

Outline
The discharge pipe temperature is used as the internal temperature of the compressor. If the
discharge pipe temperature rises above a certain level, the upper limit of frequency is set to
keep the discharge pipe temperature from rising further.
Detail
117
(Hz)
Frequency
C
B
A
A (Hz)
B (Hz)
C (Hz)
D (seconds)
E (seconds)
F (seconds)
A
B
Discharge pipe
temperature
A (˚C)
B (˚C)
C (˚C)
D (˚C)
E (˚C)
The temperatures D and E are the same.
Zone
Stop zone When the temperature reaches the stop zone, the compressor stops.
Dropping zone The upper limit of frequency decreases.
Keep zone The upper limit of frequency is kept.
Reset zone The upper limit of frequency is canceled.
D E F
40/50/52/58 class 68/75/80/90 class
55
70
85
150 ~ 240
180
300
Stop zone
Dropping
zone
C
Keep
zone
Reset zone
40/50/52/58 class 68/75/80/90 class
110
103
102
100 107
95 107
Control
SiBE121135_A
(sec.)
Time
(R13528)
55
65
80
120
200
470
D
E
(R14266)
120
111
109
Function and Control