MTU 12 V 4000 M23F Operating Instructions Manual page 140

404 – AL Open Load Digital Input 5
Line disruption on digital input 5
Yellow alarm; warning
Cause
Wiring faulty.
No resistance over switch.
405 – AL Open Load Digital Input 6
Line disruption on digital input 6
Yellow alarm; warning
Cause
Wiring faulty.
No resistance over switch.
406 – AL Open Load Digital Input 7
Line disruption on digital input 7
Yellow alarm; warning
Cause
Wiring faulty.
No resistance over switch.
407 – AL Open Load Digital Input 8
Line disruption on digital input 8
Yellow alarm; warning
Cause
Wiring faulty.
No resistance over switch.
140 | Troubleshooting | MS150068/01E 2014-01
ZKP-Number: 2.8006.629
Corrective action
1. Check wiring (→ Page 265).
2. Check target device input.
3. Contact Service.
ZKP-Number: 2.8006.630
Corrective action
1. Check wiring (→ Page 265).
2. Check target device input.
3. Contact Service.
ZKP-Number: 2.8006.631
Corrective action
1. Check wiring (→ Page 265).
2. Check target device input.
3. Contact Service.
ZKP-Number: 2.8006.632
Corrective action
1. Check wiring (→ Page 265).
2. Check target device input.
3. Contact Service.