MTU Gas engine8 V 4000 L62 Operating Instructions Manual page 161

419 – SD T-Coolant b. Engine
Red alarm.
Associated parameter 1.8004.604
Cause
Coolant temperature sensor at
engine inlet defective, short
circuit or wire break.
423 – LO P-Coolant Diff.
Red alarm. Engine shutdown.
Associated parameter 2.0180.921
Cause
Coolant differential pressure too
low. Volumetric flow too low.
429 – HI P-Coolant
Red alarm. Engine shutdown.
Associated parameter 2.0101.931
Cause
Coolant pressure after engine
too high (limit value 3).
430 – LO P-Coolant before Engine
Yellow alarm.
Associated parameter 2.0168.921
Cause
Coolant pressure before engine
too low (limit value 1). Volumetric
flow too low, static pressure too
low.
ZKP-Number:
Corrective action
u Check sensor and cabling (B6.3), replace if necessary.
ZKP-Number:
Corrective action
u Check engine coolant circuit (pressure and volumetric flow).
ZKP-Number:
Corrective action
u Check engine coolant circuit (pressure and volumetric flow).
ZKP-Number:
Corrective action
u Check engine coolant circuit (pressure and volumetric flow).
MS150032/02E 2012-07 | Troubleshooting | 161