Chapman MF350 Instrucciones página 6

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Fault Codes & Counter Troubleshooting

OL = Overload. Motor or slide plate jammed, or plug / socket connection is poor. Check plug / socket connection and check slide

plate is not jammed.

F1 = Sensor Fault. No output is being received from sensor. Check plug / socket for dirt or corrosion preventing contact. Check

sensor for damage or corrosion. The unit will continue to operate with this fault but will not count. To exit this fault condition

once the problem has been identified turn the unit off. by holding the ON/OFF button unt the unit switches off.

The control box MUST receive a signal from the sensor in order to 'park' the motor in the correct position with the slide SHUT. If no signal is

received for approximately 5 seconds the F1 error will show up. If this is the case the unit can be switched off by holding down the ON/OFF

button for several seconds, however please not that the motor may stop with the slide plate open in this case, allowing feed to escape.

For most instances of F1 error the cause is generally connector or cabling. First and foremost check connectors ae clean, making good contact and

there is no damage to the cable. Dirt or corrosion can lead to poor contact and unreliable sensor signal, culminating in an F1 fault code.

Plug/socket wiring;

A further cause of issue is rodent damage to cables inside the feeder itself. The sensor cable is small and can be chewed by rodents attracted to

the machine by feed residue within the mechanism. Once the main plug/socket and cables have been checked for issue it may be necessary to

open up the feeder itself to resolve the issue as below;

Procedure

Remove the belly pan (1) in order to access the running gear. You may find it easier to remove the entire metering assembly from the

hopper so that the unit can be worked on easier. The metering unit (2) is secured to the hopper with 6 x M10 bolts around the bottom

of the hopper, and 2 x M10 bolts adjacent to the electrical socket on the frame.

You should not need to remove the slide plate to access the sensor, however f you do need to remove the slide plate for access, this

can be achieved by unclipping the spring from the slide plate and removing the 5 x bearings and associated bolts which locate the plate.

TAKE NOTE OF THE NUMBER OF WASHERS AS THESE NEED TO BE RE-FITTED IN THE SAME ORDER TO ENSURE THE SLIDE MOVES

SMOOTHLY.

The sensor and the magnet should pass each other with approximately 2mm gap between them. The sensors also need to be aligned

vertically (so that they are approximately level with each other). If required you can bend the sensor support bracket up or down to get

vertical alignment, and you can move the sensor in or out on the slotted holes to get horizontal alignment. Sensor signal can be checked

using a multi-meter – resistance should drop to zero momentarily as the sensor passes the magnet. The sensor can be adjusted and the

mechanism rotated by hand (it will be hard to rotate by hand but will rotate) such that a reliable signal is obtained on the bench prior to

re-fitting into the machine.

FOR MACHINES USED WITH DUSTY FEED OR FEED WITH ADDITIVES SUCH AS MOLLASES, BUILD UP OF DIRT CAN AFFECT THE SENSOR

OPERATION – IN THIS CASE CLEAN WITH A LOW-PRESSURE WATER JET.

Consult the relevant parts diagram for the sensor part number if spares are required, alternatively contact your distributor.

Brown = 7 = Motor –

Red = 3 = Motor +

Green = 5 = Sensor Cable (zero voltage – not polarity specific)

White = 1 = Sensor Cable (zero voltage – not polarity specific)

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