Appendix/Self-Test And Troubleshooting; Self-Test; Checking The Led Displays; Mains-Supply Test And Troubleshooting - Elektron MULTISPOT M20 Operating Instructions Manual

7.0 Appendix/self-test and troubleshooting

7.1 Self-test

The MULTISPOT M20 is provided with a self-test program to
check and evaluate the functions of the unit.

7.2 Checking the LED displays

 Detach the gun from the power supply unit.
 Connect the unit to the power supply.
 Switch the unit OFF.
 Depress key "A", switch the unit ON, release the key "A". All
the LEDs on the operating panel will be switched on in se-
quence.
 The test ends after 5 cycles or when any key is pressed.

7.3 Mains-supply test and troubleshooting

Test procedure:
 Connect gun and select the "stud welding" mode:
 Time to max: GH keys
 Insert spot electrode in the gun.
 Press the spot electrode firmly onto the earth shoe (36),
press the gun trigger and perform the short-circuit weld.
Evaluating the test
LEDs under the mains plug symbol:
Green
Green+yellow Insignificant mains drop, good welding
Yellow
Yellow+red
Red
Causes of power drop under load:
 Extension cables too long.
 Mains power cord from power point (fuse box) to plug is too
long or cable cross-section is too small.
 The mains voltage is below the normal value.
No mains drop, full welding performance
available
performance
Larger mains drop, lower welding performance
Critical mains drop, welding performance not
sufficient
Mains drop too great, spot welding is not
possible.
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