Surging Of The Low-Pressure Or High-Pressure Stage; Table 33: Surging Of The Low-Pressure Or High-Pressure Stage - ABB PT003888 Operation Manual

Operation Manual / Power2 340-H / Low-pressure stage
8 Troubleshooting / 8.3 Surging of the low-pressure or high-pressure
stage
8.3 Surging of the low-pressure or high-pressure
stage
Possible causes
Engine Protective grating downstream of
high-pressure stage contaminated or
damaged
Low-pressure Filter silencer or diffuser contamin-
or ated
high-pressure
Heavy dirt deposits in the turbine or
stage
in the nozzle ring
Charge air Cooler contaminated
cooler/inter-
Charge air duct blocked
cooler
Table 33: Surging of the low-pressure or high-pressure stage
CAUTION
Continuous or periodic surging
If the low-pressure or high-pressure stages surge continuously or periodic-
ally, their components may be damaged.
Gradually reduce the engine load.
u
Have the cause clarified and remedied immediately by a Turbo Systems
u
service station.
Have parts assessed for damage and, if necessary, replaced by a Turbo
u
Systems service station.
Sporadic surge blows
Surging of the low-pressure stage can occur during certain operating states, such as when
reducing the engine performance quickly when manoeuvring. When this happens, the flow
direction in the compressor is momentarily reversed. Such sporadic surge blows do not im-
pair the safe operation of the low-pressure stage.
¡
A surge blow is accompanied by a loud bang and escape of hot air or air/gas mixture
from the filter silencer of the low-pressure stage.
There is no escape of air or air/gas mixture from the high-pressure stage.
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Remedy
Clean/replace
Clean
Clean
HZTL4053_EN Rev.F March 2022