Service manual

Control Specification SiBE12-816_D
87 Function and Control
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 this temperature from going up further.
Detail
40 class 50 class Unit
A
62 55
Hz
B
72 70
C
90 85
D
140 150
seconds
E
180 180
F
300 300
(sec.)
Time
(R13528)
(Hz)
Frequency
B
A
C
DEF
Zone Control
Stop zone When the temperature reaches the stop zone, the compressor stops.
Drooping 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.
50 class
110
103
102
100
95
40 class
110
103
102
101
97
(˚C)
(˚C)
(˚C)
(˚C)
(˚C)
Reset zone
Stop zone
Drooping
zone
(R14062)
Keep
zone
A
B
D
E
C
A
B
D
E
C
Discharge pipe
temperature