ABB A155-M66 User Manual

Operation Manual / A150-M56/66/57/67 - A155-M..
8 Eliminating malfunctions / 8.5 Speed measurement system
© Copyright 2021 ABB. All rights reserved. HZTL4032_EN Rev.Q January 2021
8.5 Speed measurement system
No signal or poor signal amplitude of the speed measurement
Possible causes Remedy
Turbochar-
ger
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 sig-
nal.
The screw plug for the sensor is fitted with an ad-
ditional gasket (copper ring).
For information regarding the disassembly and as-
sembly of the speed sensor, refer to chapter Re-
placing the speed sensor →49.
Install the speed sensor without the additional
gasket (copper ring).
Sensor or cable defective Contact an ABB Turbocharging Service Station.
Order new speed sensor(86505) (refer to chapter
Ordering spare parts →173).
Replacing the speed sensor →49.
Table33: Malfunction of the speed measurement system – No signal or poor signal amplitude
Measured speed too high
Possible causes Remedy
Turbochar-
ger
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 ampli-
fication of the noise com-
ponent and, hence, to false
triggering.
For information regarding the disassembly and as-
sembly of the speed sensor, refer to chapter Re-
placing the speed sensor →49.
Dismantle the sensor, clean the sensor tip, and fit
the sensor back on with the specified tightening
torque.
Table34: Malfunction of the speed measurement system – Measured speed too high
Measured speed too low
Possible causes Remedy
Turbochar-
ger
- - Contact ABB Turbocharging Service Station
Table35: Malfunction of the speed measurement system – Measured speed too low
If none of the measures described above remedy the malfunction, have the speed measure-
ment system checked by an ABB Turbocharging Service Station.
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ABB A155-M66 Specifications

General

Brand	ABB
Model	A155-M66
Category	Industrial Equipment
Language	English