Bernhard EXPRESS DUAL ED2000, User Manual/Instruction Manual

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EXPRESS DUAL • ED2000
© Bernhard and Company Limited
20
EXPRESS DUAL • ED2000
© Bernhard and Company Limited
21
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.
7.3 Check voltage in electrical junction box, low-right hand side of machine. Then in the
control panel box.
7.4 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.
7.5 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.
7.6
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.
7.7
Reel Drive
If the contactor is functioning properly, check the capacitor.
If neither are faulty then the motor is probably at fault.
7.8
Main Motor
If the contactor is functioning correctly, check the load current with an ammeter across
terminals T2 and T3 on Thermal overload. If this exceeds full load current indicated on
the motor identification 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