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Operation Manual / A150-M58/68
8 Eliminating malfunctions / 8.2 Malfunctions during operation
Exhaust gas temperature too high
Engine performance and engine speed unchanged
Possible causes
Turbocharger
Insufficient air, for example, when fil-
ter silencer is blocked by contamina-
tion
Compressor/turbine contaminated
Exhaust gas back pressure too high
Turbine damaged or eroded
Engine
Malfunction in the injection system
Charge air
Cooler contaminated
cooler
Cooling water volume too low
Inlet temperature of cooling water
too high
Insufficient ventilation
Table 23: Malfunctions during operation – Exhaust gas temperature too high
Charge air pressure too low
Engine performance and engine speed unchanged, suction condition normal
Possible causes
Turbochar-
Manometer display not correct
ger
Supply pipe to manometer not sealed
Filter silencer contaminated, therefore
pressure drop too high
Compressor end and/or turbine end
contaminated
Compressor/turbine damaged
Exhaust gas back pressure too high
Engine
Air receiver not sealed
Gas piping between engine and turbine
leaking
Injection mistimed
Valve control misadjusted
Pipes
Pipes downstream to the compressor
outlet not sealed.
Table 24: Malfunctions during operation – Charge air pressure too low
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Remedy
Clean (see chapter
ance work
→57)
Clean or repair boiler or exhaust gas si-
lencer
Contact ABB Turbocharging Service
Station
Repair or contact manufacturer
Clean
Fill
Check/clean cooling system
Improve ventilation
Remedy
Replace manometer
Repair leak
Clean (see chapter
ance work
→57)
Contact ABB Turbocharging Service
Station
Clean or repair boiler or exhaust gas si-
lencer
Repair
Set correctly
Repair.
HZTL4041_EN
Periodic mainten-
Periodic mainten-
Rev.E
January 2021
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