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CWL-20E
Troubleshooting
14.
Troubleshooting
The following pages are a list of pre-programmed faults
and possible solutions. If the solution listed fails to
correct the problem, contact the manufacturer using the
contact information on the back cover of this manual.
Please have the model number and serial number of your
lift unit and Touch Screen Controller available. The lift
unit serial number is on a permanently attached plate
located on the right caster bracket (See Fig. 21). The
serial number of the Electronics Enclosure is on the right
hand side panel of the Electronics Enclosure.
Fig. 21: Serial number locations
1
Lift unit serial number
2
Electronics enclosure serial number
Touch
screen
message
Meaning
Possible solutions
Recharge
needed
•
Energy level on one or
more lift(s) has dropped
below desired minimum –
please recharge before
next lift.
•
Further use without
recharge
could
shorten
battery life.
1.
Plug extension cord into
battery charger cord
socket to charge battery.
Max.
Allowed
Lift
Height
•
Lift system has reached
the maximum height
allowed for the present
configuration of lifts.
1.
Lift system may be
lowered from this height.
Feedback
Loop
•
Lift Table position on one
or more lift units is not
responding properly to
controller commands.
•
Lift Table speed does not
match controller output.
1.
Reset the fault.
2.
If reoccurs, verify no
obstructions with lift table.
3.
If no obstructions, check
operation of linear position
sensor by observing the
height readout on the
display.
Touch
screen
message
Meaning
Possible solutions
Low
Battery
•
Energy Level on one or
more lift units has
dropped to a point where
further lifting
will
damage
battery. However, vehicle
can be lowered.
•
Identified lift unit(s)
must
be recharged (or swapped
to spare battery) before
further lifting can take
place.
NOTE
NOTE
NOTE
NOTE: If backup battery is
used to finish lift
operation, properly charge
or replace lift unit battery.
1.
Plug extension cord into
battery charger cord
socket, if 110 VAC is
available.
2.
If not available:
o
Locate spare 12 VDC
battery.
o
Turn
OFF
master on/off
switch.
o
Disconnect system power
cables from battery
terminals.
o
Remove discharged
battery.
o
Install spare battery.
o
Connect system power
cables to spare battery
terminals.
o
Turn
ON
master on/off
switch.
o
Re-synchronize system
to continue.
Signal
Loss
•
Communication from one
or more lift units was lost.
•
Can be caused by outside
RF interference and is
considered normal.
•
Communication link needs
to be reestablished.
1.
Check that the master
on/off switch on all lift
units in the lifting system
is still turned
ON
.
2.
Wait a few minutes to see
if interference clears and
lift system is able to
automatically recover.
3.
If “Signal Loss” continues
to reoccur, turn all lift units
OFF
, select another radio
frequency several
frequencies away, and re-
synchronize the system.
More than one lift system
can operate on the same
frequency as long as each
system uses a different
channel.
Out-of-
Sync
•
Lift units heights are not
within acceptable
synchronization range.
•
All lift units must be within
3” of each other to
operate.
1.
Reset the fault.
2.
Operate lift system in the
opposite direction
temporarily to re-
synchronize.
3.
If unable to re-
synchronize, use manual
lowering procedure and
re-sync at ground level.
