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

Multitest 0.5d, 1d & 2.5d
Service and Repair Manual
25.

Fault finding and cure.

For explanation of the RS232 loom and SPI loom please refer to section titled What
are the SPI and the RS232 looms?
Quick Reference Guide
Stand will not turn on
LCD fails to illuminate
LCD illuminates but has no display
Error 02 is displayed on screen
Error 06 is displayed on screen
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
Speed reading is erratic/jumpy or speed is all
over the place when I turn speed dial
Error 09 is displayed on screen
Stand resets itself. (Switches on and off).
Stand times-out / Cross-head only travels a
short distance.
1) Stand won't turn on:
116. 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.
117. Connect a D.V.M to the orange and yellow wires of the transformer to check for
correct voltage 24-28V AC.
118. Check between TP 2 and TP 1 for a voltage greater that 27 - 31 V DC
119. Check between TP 3 and TP 1 for a voltage of approx 20V DC
120. Check between TP 4 and TP 1 for a voltage of 5V DC
121. If all of above is ok then reprogram the motor control PCB and the front panel
PCB.
122. If the stand still fails to turn on, replace the motor control PCB.
Fault
Number 022-005
Issue Number: 08
Section
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Page 38 of 58