MTU 12 V 4000 M33F Operating Instructions Manual page 109

90 – SS Starter Speed Not Reached
Idling speed not attained
Red alarm; warning
Cause
Various causes possible.
91 – SS Release Speed Not Reached
Runup speed was not attained
Red alarm; warning
Cause
Various causes possible.
92 – SS Starter Speed Not Reached
Starter speed not reached
Red alarm; warning
Cause
Starter rotates too slowly or
does not rotate at all.
93 – SS T-Preheat
Preheating temperature too low (limit value 2)
Red alarm; engine start interlock
Cause
Preheating unit not functioning.
94 – LO T-Preheat
Preheating temperature too low (limit value 1)
Yellow alarm; warning
Cause
Coolant temperature too low for
engine start because preheating
unit is not functioning.
ZKP-Number: 2.1090.925
Corrective action
1. Check for additional messages.
2. Contact Service.
ZKP-Number: 2.1090.924
Corrective action
1. Check for additional messages.
2. Contact Service.
ZKP-Number: 2.1090.923
Corrective action
1. Check for additional messages.
2. Contact Service.
ZKP-Number: 2.1090.922
Corrective action
1. Check preheater.
2. Contact Service.
ZKP-Number: 2.1090.921
Corrective action
1. Check preheating unit.
2. Contact Service.
MS150069/02E 2014-03 | Troubleshooting | 109