Service manual

23
TROUBLE SHOOTING
NOTICE: Read manual prior to trouble shooting. A good understanding of how this lift
and its controls function will greatly help in understanding any problems that may
occur.
START-UP:
Problem: Upon power up, screen does not illuminate (on any single column).
Solution1: Verify that power cables are unplugged from charger inlets on all posts. Post will not power up
unless power is removed from charger.
Solution2: Check to see that battery cables are connected to batteries properly. Also verify 24 VDC at the
control panel.
Solution3: PLC may have faulty screen. Consult Mohawk Service department.
Problem: All posts are not shown on activation screen.
Solution1: Verify that all posts in system are turned on to “Operate Lift”.
Solution2: Check for proper communication cable and dummy plug connection of all posts. (See lift setup)
Solution3: Possible faulty communication cable or dummy plug. Consult Mohawk Service department.
Problem: Error Code present.
Solution: See Error Code Section in this manual.
DURING OPERATION:
Problem: Error Code present.
Solution: See Error Code Section in this manual.
Problem: There is more than 1-1/2” height difference between carriages.
Solution: This may be due to the fact that one column was operated on SINGLE before operating the unit in
the ALL mode. This may also be due to operating in the PAIR mode before operating in ALL mode.
Problem: Lift jack not raising lift or lift jack not collapsing when loaded.
Solution1: Lift jack relief valve needs to be adjusted. Turn relief set screw clockwise to increase lifting
ability of jack. Turn relief set screw counter-clockwise to reduce lifting ability of jack. See illustration in
back of manual.