Autoquip SLACK CHAIN SENSING SWITCHES – FLM & FLMC - Manual (Page 5)

35100961 – Rev.1
3. After installing the slack chain sensing switches, you must test them to make sure
they are adjusted and set correctly.
a. stack some empty pallets under the carriage, surface must be level
b. operate the lift and lower the empty carriage onto the pallets
c. when the carriage makes contact with the pallets and as soon as the
lifting chains go slack, the motor should stop.
CAUTION: Be ready to press the emergency stop button if the motor doesn’t
stop when chains go slack.
IF THE MOTOR STOPS WHEN CHAINS GO SLACK
4. A qualified electrician should, while referencing the lift’s electrical schematic, test
the electrical continuity of both slack chain sensing switches inside the lift’s motor
control panel to make sure that the contacts in both switches are in the open
condition. If both are confirmed open, proceed to step 6. If either switch has
contacts which test closed, repeat steps 2 through 4.
IF THE MOTOR DOESN’T STOP WHEN CHAINS GO SLACK
5. If the emergency stop button had to be used to stop the motor, repeat steps 2
through 4 to further adjust & re-test both slack chain sensing switches.
6. Once confirmed that both slack chain sensing switches are in the open condition as
required, chain tension must be re-established in both lifting chains. However,
because the slack chain sensing switches are now set properly, the motor will not
run to lift the chains. Therefore, a qualified electrician must install a temporary wire
jumper inside the lift’s motor control panel and bypass the slack chain sensing
switches in order to be able to run the motor and raise the carriage enough to re-
establish chain tension. Refer to the job-specific electrical schematic for
identification of the correct electrical contacts to accomplish this.
NOTE: Make sure to remove the temporary jumper once the sensors are adjusted
properly and after chain tension is re-established in both lifting chains.
WARNING !
Slack chains require factory help! Do not attempt to repair slack chain
conditions alone! Always contact your local Autoquip representative or call
the Autoquip Service Department at 888-811-9876.
INSTALLATION INSTRUCTIONS