MTU 12 V 4000 L62FB Operating Instructions Manual page 109

452 – HIHI T-Charge Mix
Red alarm. Engine shutdown.
Associated parameter 2.0169.932
Cause
Mixture temperature too high
(limit value 2). Mixture coolant
pump failure, volumetric flow too
low, cooling system inlet
temperature too high, mixture
cooler clogged.
453 – LO T-Charge Mix
Yellow alarm.
Associated parameter 2.0169.921
Cause
Mixture temperature is too low
(limit value 3).
454 – SS Power Limitation Active
Yellow alarm.
Associated parameter 2.7000.011
Cause
Power limitation activated.
457 – LO T-Intake Air
Yellow alarm.
Associated parameter 2.0123.921
Cause
Intake air temperature is too low
(limit value 3).
458 – LOLO T-Intake Air
Red alarm. Engine shutdown.
Associated parameter 2.0123.922
Cause
Intake air temperature is too low
(limit value 4).
Corrective action
1. Check mixture cooling circuit.
2. Check mixture cooler for dirt.
Corrective action
1. Check intake air temperature.
2. Check mixture cooling circuit.
Corrective action
u Rectify cause of limit violation. (e.g. lower intake temperature)
Corrective action
u Check ventilation system.
Corrective action
u Check ventilation system.
MS150098/02E 2016-11 | Troubleshooting | 109