ABB A170-M Series Original Operation Manual

Operation Manual / 4 Product description / A100-M axial
7 Troubleshooting / 7.5 Speed measurement system
© Copyright 2019 ABB. All rights reserved. HZTL4033_DE Revision C February 2019
7.5 Speed measurement system
No signal or poor signal amplitude of the speed measurement
Possible causes Remedy
Turbocharger The speed sensor was acci-
dentally fitted with an addi-
tional gasket.
An enlarged distance between
the sensor tip and the signal-
emitting sealing disc reduces
the voltage amplitude of the
speed signal.
The screw plug for the sensor is fitted with an addi-
tional gasket (copper ring).
For information regarding the disassembly and as-
sembly of the speed sensor, refer to the chapter
Turbocharger speed.
Install the speed sensor without the additional gas-
ket (copper ring).
Sensor defective Contact ABB Turbocharging Service Station.
Table27: Malfunction, No speed measurement signal or poor signal amplitude
Measured speed too high
Possible causes Remedy
Turbocharger Sensor tip contaminated,
since it is magnetic and can
attract metallic particles. This
reduces the distance to the
signal-emitting sealing disc,
which can lead to amplifica-
tion of the noise component
and, hence, to false triggering.
For information regarding the disassembly and as-
sembly of the speed sensor, refer to the chapter
Turbocharger speed.
Dismantle the sensor, clean the sensor tip, and fit
the sensor back on with the specified tightening
torque.
Table28: Malfunction, Measured speed too high
Measured speed too low
Possible causes Remedy
Turbocharger - - Contact ABB Turbocharging Service Station
Table29: Malfunction, Measured speed too low
NOTICE
Other causes of malfunction
If none of the measures described above remedy the malfunction, have the
speed measurement system checked by an ABB Turbocharging Service Sta-
tion.
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ABB A170-M Series Specifications

General

Brand	ABB
Model	A170-M Series
Category	Industrial Equipment
Language	English