Kemppi Mastertig MLS 3003 ACDC Service Manual page 25

Measurements
These tests have to be done after replacing any primary or
secondary units. It absolutely important because possible short
circuit (e.g. improperly installed mica insulator) might damage
machine severely.
TESTING OF THE CONTROL CARD AND CONTROL CIRCUITS
1. Disconnect cooling fans (A001/X9)
2. Disconnect (HF, Spark generator card) A003/X8
3. Connect jumpers A001/X14 (overvoltage) and A001/X16 (main switch open) on control
card A001
4. Disconnect A001/X7.
5. Connect Kemppi Multipower and digital multimeter with current measuring function to
X7-1 (24 VDC) and X7-2 (GND).
6. Switch on Kemppi Multipower and watch current consumption and test the panel
functionality.
7. < 300mA is OK (normally 120mA/24V without cooling fans and magnetic valve)
• If current is over the limit you can disconnect other connectors from A001 to
check where current using circuit is.
• You can test cooling fans and gas valve by connecting A001/X9
(Current limit needs to be about 1A)
8. Turn off machine and disconnect power supply.
9. Connect A001/X7.
10. Restore jumpers and wires.
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