MTU 20V4000C55, Operating Instructions Manual

Page: 47 / 226

Engine fires unevenly
Cause Corrective action
Engine, fluids and lubricants too
cold u Preheat engine with plant auxiliaries
Injector defective
u
Check, replace as necessary (→ Page 102)
Engine wiring defective u Check (→ Page 158)
Air in fuel system
u
Vent fuel system (→ Page 107)
Engine governor defective u Contact Service
Engine does not reach rated speed
Cause Corrective action
Fuel prefilter clogged
u
Replace (→ manufacturer's documentation)
Fuel filter clogged u Replace (→ Page 108) (→ manufacturer's documentation)
Additional fuel filter clogged
u
Replace (→ Page 109)
Air filter clogged u Check, replace as necessary (→ manufacturer's documentation)
Injector defective
u
Check, replace as necessary (→ Page 102)
Engine wiring defective u Check (→ Page 158)
Engine overloaded
u
Contact Service.
Speed demand setting does not
match rated speed u Correct speed demand setting
Engine alarm involving power
reduction signaled
u
Rectify cause of engine alarm
Rated speed limited by the plant u Check plant parameter settings and correct as necessary
Engine speed not steady
Cause Corrective action
Injector defective
u
Check, replace as necessary (→ Page 102)
Speed transmitter defective u Contact Service
Air in fuel system
u
Vent fuel system (→ Page 107)
Engine governor defective u Contact Service
High load fluctuations, e.g. by
consumers attached to auxiliary
PTOs 1. Switch off consumers
2. Contact Service
Charge air temperature too high
Cause Corrective action
Incorrect coolant concentration u Check (→ MTU test kit)
Intercooler clogged
u
Contact Service
EGR cooler clogged u Contact Service
Engine room: Air-intake
temperature too high
u
Check fans and air supply/exhaust ducts
MS15043/00E 2016-04 | Troubleshooting | 47
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