Operation Manual / Power2 650-M / 4 Product description
7 Troubleshooting / 7.2 Malfunctions during operation
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HZTL4064_EN
Rev.E
March 2020
Increase in high-pressure stage speed
Possible causes
Remedy
High-pressure
stage
Heavy contamination of the nozzle
ring
Contact ABB Turbocharging Service
Station
Low-pressure stage defective
Contact ABB Turbocharging Service
Station
Pipes
Leak in exhaust gas pipe before the
low-pressure stage
Repair
Table 18: Malfunctions during operation – Power2 HP speed increases
Exhaust gas temperature too high
Engine performance and engine speed unchanged
Possible causes
Remedy
Engine
Malfunction in the injection system
Repair or contact manufacturer
Low-pressure
or
high-pressure
stage
Insufficient air, for example, because
filter silencer is blocked by contam-
ination
Clean
Compressor/turbine contaminated
Exhaust gas back pressure too high
Clean or repair boiler or exhaust gas si-
lencer
Turbine damaged or eroded
Contact ABB Turbocharging Service
Station
Charge air
cooler/inter-
cooler
Cooler contaminated
Clean
Cooling water volume too low
Fill
Inlet temperature of cooling water
too high
Check/clean cooling system
Insufficient ventilation
Improve ventilation
Table 19: Malfunctions during operation – Exhaust gas temperature too high
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