1.3A-28001-B97
Owner Manual
Subject to change without notice
Page 12 of 16
LINCOLN GmbH • Postfach 1263 • D-69183 Walldorf • Tel +49 (6227) 33-0 • Fax +49 (6227) 33-259 • Tx 466088
Troubleshooting
Do not touch anything between the con-
necting link (Fig.8, item B) and the chan-
ge-over valve housing (Fig. 8, item A) if the
housing cover is opened and the EM-U2 is
ready for operation.
• Fault: no pressure build-up or pressure build-up too slow
• Cause:
• Line system or two-line metering devices leaking
• Piston and/or change-over valve housing worn
• Remedy:
• Check the lines and metering devices
• Replace the complete change-over valve housing (refer to Fig.
12, item 1)
• Fault: no changing over is released
• Cause:
• Line interruption between the units of the change-over valve
• End-of-line pressure switch does not give any signal
• Remedy:
• Check the electric lines and the fuse of the change-over valve
• Check whether the change-over valve operates by actuating it
manually
Check the adjustment of the change-over valve
Check the electric lines between the end-of-line pressure switch
and the change-over valve
• Fault: the change-over valve operates continuously
• Cause:
• The switching point of the position switch is not reached
• Remedy:
• Check the adjusted value of 20
-0.5
and re-adjust it, if necessary.
• Check the adjustments shown on Fig. 9 - 11 see remedy at
following fault:”The line which has been charged after the rever-
sing process is not relieved ”
