Fault Finding And Cure - Mecmesin Multitest 0.5dV Service And Repair Manual

Multitest 0.5dV, 1dV & 2.5dV
Service and Repair Manual

16. Fault finding and cure.

Quick Reference Guide
Stand will not turn on
Over travelled is displayed on screen
Opto on limit switch fails to work
Crosshead fails to move
Stand fails to communicate with the gauge
Stand fails to communicate with the pc
Stand fails height test
Stand fails load test
Stand fails speed test
Stand resets itself. (Switches on and off).
Stand times-out / Cross-head only travels a short distance.
1) Stand won't turn on:
82.
Check fuses in mains inlet filter and ensure it is a 2A time lag (T) Check that all
the looms are connected and in the right positions.
83.
Connect a D.V.M to the orange and yellow wires of the transformer to check for
correct voltage 24-28V AC.
2) Over travelled is displayed on screen:
i. Check that the limit switch rod moves freely. If the rod moves freely up and down
do you hear a click in both directions of the micro-switches?
If the limit switch rod doesn't move freely then remove base from stand and check
ii.
that the micro switch spacer closest to the base casting hasn't rotated causing it
to catch on
the base casting.
iii. Check that the limit switch is connected to the VIC board.
iv. Check that the limit switch IDC cable does not have a broken cable or poorly
made connector joint – perform a continuity test.
v. Check the emergency stop switch button is securely connected to the switch loom
– perform a continuity test.
Number 022-780
Issue Number: 02
Fault
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