Troubleshooting; Maintenance And Repairs; Characteristics - E. DOLD & SOHNE SAFEMASTER LG 5928 Manuel D'utilisation

Troubleshooting

Failure
LED "Power" does not light up
LED "K1" lights up,
but "K2" remains off
LED "K2" lights up,
but "K1" remains off
Device cannot be activated

Maintenance and repairs

- The device contains no parts that require maintenance.
- In case of failure, do not open the device but send it to manufacturer
for repair.
Potential cause
Power supply A1/A2 not connected
- Safety relay K1 is welded
(replace device)
- A 1-channel switch-off occurred on
S12 (switch channel off on
S22 e. g S32)
- Safety relay K2 is welded
(replace device))
- A 1-channel switch-off occurred on
S22 e. g. S32 (switch channel off
on S12)
- The delayed contacts are not yet
switched off
- Safety relay is welded
(replace device)
- Min. one of this connection is not
present (S11-S12, S11-S32, S21-S22)
Manual start mode:
- Line fault on start-button (disconnect
power supply and remove fault)
- Automatic start mode:
S13-S34 are not bridged

Characteristics

250
200
150
100
75
50
40
30
20
15
10
0,2 0,4 0,7 1
Switching current I [ A ]
safe switch-off, no standing arc
max. 1 switching cycle/s
Limit curve for arc-free operatio
S 2
( A ) 2
I
200
150
100
50
0
0 10 20
device mounted on distance with air circulation.
max. current at 55°C over
3 contactrows = 2x(7A) + (5A) =123A
device mounted without distance heated by
devices with same load,
max current at 55°C over
3 contactrows = 3x (3A) = 27A
S I = I + I + I
2 2 2 2
1 2 3
I , I , I
- current in contactrows
1 2 3
Quadratic total current limit curve
18
2 3 4
6
2
164A max
°
T ( C)
30 40 50 60
M9971
2 2 2
2 2
LG 5928 / 06.06.16 en / 704