Voith WSR-D16212, Инструкция по эксплуатации

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Instruction Manual
Voith Turbo Way Valve WSR-D16212
2003 / 07 aie Voith Turbo GmbH & Co. KG Page: 20 / 24
918 3626 018870 en D – 74564 Crailsheim Version: 3.0
7.3 Troubleshooting
Troubleshooting must only be performed in a non-hazardous atmosphere.
Prior to starting the work, make sure that the way valve was installed electrically and
hydraulically according to the information provided in Chapter 5 and properly
commissioned according to the information provided in Chapter 6.
Malfunction Possible cause(s) Remedy
The piston rod
shows temporary
stroke variations.
Air pockets and/or lack of
damping
De-aerate the way valve as per Chapter 6.1.
Precondition:
Disconnect external setpoint and connect
setpoint source directly to the way valve.
Electrical fault on the
connecting cable and/or
vibration of the master
controller Establish precondition and enter a constant
setpoint. If a stroke variation does no longer
occur, check the connecting line and/or the
master controller for malfunctions and/or
defects.
Proportional gain set too high Establish precondition and realize setpoint step-
changes. If this causes periodic stroke
variations, readjust the gain. See Chapter 6.2.3.
The piston rod
shows periodical
stroke variations
There is mechanical friction
in the slide valve. Establish precondition. Enter setpoint w 0 8 mm
for t = 30 sec. Then increase the setpoint in one
step to 8.5 mA and keep it constant for 30 sec. If
the stroke varies in one of the two phases,
ingress of dirt into the slide valve may be the
cause. Open slide valve and clean interior parts.
In case of damage to the control edges and
surfaces, completely replace the way valve.
Piston rod shows
sporadic stroke
variations
Connecting fault and/or
defective electric lines Connect setpoint source directly to the way
valve. If this remedies the malfunction, check the
electric line.
Defect in the Voith control
magnet Connect setpoint source directly to the way
valve. If malfunctioning still continues, replace
the control magnet.