MTU 20V4000L33F Operating Instructions Manual page 79

1.4520.256 – Open Primary, Channel 12
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.257 – Open Primary, Channel 13
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.258 – Open Primary, Channel 14
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.259 – Open Primary, Channel 15
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.260 – Open Primary, Channel 16
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.262 – Open Primary, Channel 17
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
1.4520.263 – Open Primary, Channel 18
Yellow alarm. Initiated by IC922.
Cause
Ignition energy was not
discharged.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
Corrective action
1. Check cabling to ignition coil.
2. Check ignition coils.
MS150108/02E 2015-03 | Troubleshooting | 79