ABB HT562624 Operation Manual page 94

Operation Manual / 4 Product description / A150-M.. - A155-M..
7 Eliminating malfunctions
Charge air pressure too high
Engine performance and engine speed unchanged, suction condition normal
Possible causes
Engine Malfunction in the injection system
Injection mistimed
Engine performance higher than indicated Check engine performance
Turbocharger Manometer display not correct
Increased speed due to contamination of
nozzle ring
Table 24: Malfunctions during operation – Charge air pressure too high
Reduced compressor performance/efficiency, hence engine performance losses
Compressor damage
A severely contaminated or corroded compressor wheel can reduce the
compressor wheel's fatigue endurance limit and result in the turbocharger
CAUTION
being damaged.
Rectify malfunction in accordance with the following table.

Possible causes
Turbocharger Compressor components severely con-
taminated by the ventilation gases that
have been fed in
Increased blade vibration, compressor
blade damage due to the ventilation gases
that have been fed in
Material of the compressor wheel corrod-
ed due to the feeding in of ventilation gas-
es containing corrosive components
Material of the compressor wheel corrod-
ed due to intake air containing exhaust
gases or salt
Table 25: Malfunctions during operation – Engine performance losses
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Remedy
Repair or contact manufacturer
Set correctly
Replace manometer
Clean (see chapter Periodic maintenance
work [➙ 41]) or contact an ABB Turbo-
charging Service Station
Remedy
Clean (see chapter Periodic maintenance
work [➙ 41])
Optimize oil separation
Correct the feed of ventilation gases ac-
cording to instructions of enginebuilder.
Correct the feed of ventilation gases ac-
cording to instructions of enginebuilder.
Prevent exhaust gas leakages in the en-
gine space
Clean (see chapter Periodic maintenance
work [➙ 41])
HZTL4032_EN
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Revision F January 2017