Operating instructions

36
Phase monitor (accessory, 400 V~)
The phase monitor is used to monitor the
mains power supply to the compressor.
The following power supply deviations
are permitted in the delivered condition:
Over/undervoltage 15 %
Phase asymmetry 15 %
Switching delay 4 s
The phase monitor switches off (switch-
ing contact opens) if these tolerances
are exceeded.
The phase monitor automatically re-ena-
bles the power supply if the values return
to within the specified tolerance range.
Remove the cause if the relay has
responded. The relay does not need to
be reset.
A
H
B
C
G
F
E
D
D
<>U
A1
Asy
Ph
Rel
A2
L1
L2
L3
14
11
12
<>U
Asy
t
2
4
12
%
15
10
5
%
20
10
6
0.1
A
Over/undervoltage in %
B
Phase asymmetry in %
C
Switching delay in s
D
Contact used in safety chain (N/O)
E
Operating display ("Rel")
F
Fault display phase failure/phase
sequence ("Ph")
G
Fault display asymmetry ("Asy")
H
Fault display over/undervoltage
("<>U")
LEDs explained
■ LED "Rel" illuminates green:
All voltages and the rotating field
(clockwise) are healthy.
■ LED "Ph" illuminates red:
The relay has responded; the rotating
field is anti-clockwise.
■ All LED's off:
One or several phases have dropped
out.
■ LED "<>U" illuminates red:
Incorrect voltage on one/several
phase(s).
■ LED "Asy" illuminates red:
Asymmetry on one/several phase(s).
Installation sequence
Power supply
(cont.)
5441 603 GB