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EXPRESS DUAL • ED3000
© Bernhard and Company Limited
USE A QUALIFIED ELECTRICIAN
In the event of any motor not starting, the following procedure should be adopted:
7.1. Check that STOP BUTTON in control panel on top of machine is not permanently in STOP
position.
7.2 Check fuses - main fuses feeding machine and small fuses in junction box for traverse and
reel motors.
7.3. Check that reset button on junction box is not making contact with red button on the
overload. If it is adjust RESET so that it CLEARS THE BUTTON, this must be tested with
lid held in position on box (see service Bulletin no.001).
7.4. Check voltage in electrical box, right hand side of machine – terminal block, terminals 1 and 4.
7.5. Check for open circuit on overload, terminals 95 and 96, to determine whether or not main
motor is faulty. If open press red resetting button on overload.
7.6. To determine that all three contactors are OK test each one by pushing start button on
the individual contactors, they should noticeably pull in. This can be checked by someone
looking in the junction box while the start buttons are pressed.
7.7. Traverse
If the contactor is functioning properly check the microswitch. If this is found to be OK
check capacitor if possible. If neither of these is faulty, then the motor is probably at fault.
7.8. Reel Drive
If the contactor is functioning properly, check the Inverter:
There is a small LED lamp on the front of the unit. This should be green. If it is red, or
changes to red when pressing the start button, there is an inverter fault.
Disconnect the power to the machine, wait 2 minutes, then re-connect and try again (to
re-set the inverter). If the LED is still red the inverter may have failed.
If neither are faulty then the motor is probably at fault.
7.9. Main Motor
If the contactor is functioning correctly, check the load current with an ammeter across
terminals 2 and 3 on 12 way terminal block. If this exceeds full load current indicated on
the motor identication plate then a new motor is needed. If the reading is below full load
current then possibly the overload is set too low.
NOTE Before assuming that there is an electrical fault in any of the systems ensure that the
mechanical drive assemblies attached to a particular motor are moving freely, and have
not got increased resistance due to damage, or the build up of dirt. This can best be done
by detaching the motor drive and ensuring that the mechanism is moving freely.
7. Electrical Fault Finding
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