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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.
Characteristics
250
200
150
100
50
0
0,1
0,3 0,5
1
switching current A
safe breaking, no continuous arcing,
max. 1 switching cycle / s
Arc limit curve under resistive load
Potential cause
- Power supply not connected
- Cross fault between S11 and S21
- Safety relay K1 is welded
(replace device)
- A 1-channel switch-off occurred on
S12 (switch channel off on S22)
- Safety relay K2 is welded
(replace device)
- A 1-channel switch-off occurred on
S22 (switch channel off on S12)
Manual start mode:
- Line fault on start-button (disconnect
power supply and remove fault)
Automatic start mode:
- S33-S34 not bridged
- A safety relay is welded
(replace device)
- Incorrect setting of switch S1
3
5
10
Characteristics
S
2
2
( A )
I
256
200
150
100
50
0
10
20
device mounted away from
heat generation components.
Max. current at 55°C over
^
4 contact path = 5A = 4x5 A = 100A
device mounted without distance heated by
devices with same load,
Max. current at 55°C over
^
4 contact path = 4A = 4x1 A = 4A
S I = I + I + I + I
2
2
2
2
1
2
3
I , I , I , I
- current in contact paths
1
2
3
4
Quadratic total current limit curve LG 5925; AC/DC 24 V
2
S
2
( A )
I
256
200
150
100
64
50
0
10
20
device mounted away from
heat generation components.
Max. current at 55°C over
^
4 contact path = 1A = 4x4 A = 64A
device mounted with 5mm distance
Max. current at 55°C over
4 contact path = 1A = 4x1 A = 4A
^
S I = I + I + I + I
2
2
2
2
1
2
3
I , I , I , I
- current in contact paths
1
2
3
4
Quadratic total current limit curve LG 5925; AC 110 ... 115 V, AC 230 V
18
°
T ( C)
30
40
50
60
M8893_d
2 2
2
2 2
2
2
4
°
T ( C)
30
40
50
60
M9926
2 2
2
2 2
2
2
4
LG 5925 / 18.09.19 en / 152A
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