Kemppi FitWeld 300, Руководство по обслуживанию

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7
Main circuit card Z001
Measurement points
DC Link -
DC Link +
L1,L2 and L3
DC-link voltage (with Kemppi multipower):
digital multimeter
1. Feed 22 VAC to auxiliary transformers secondary
connector from Kemppi multipower (connector
must be connected)
2. Measure value from DC-link test points by digital
multimeter
Value: 500 VDC or more
3. Measure secondary voltage (start signal needed)
Value: 30VDC or more
Primary rectifier: Digital multimeter diode
test
1. Red test probe L1, L2, and L3 (one at the
time)
Black test probe DC-link plus
Value: 0,3 - 0,5 VDC -> diodes ok
2. Red test probe DC-link plus
Black test probe L1,L2 and L3 (one at the
time)
Value: No value -> diodes ok
3. Red test probe L1, L2, and L3 (one at the
time)
Black test probe DC-link minus
Value: No value -> diodes ok
4. Red test probe DC-link minus
Black test probe L1,L2 and L3 (one at the
time)
Value: 0,3 – 0,5 VDC -> diodes ok
If values in test 1 or 4 are close to zero rectifier is
short circuited. If value is “no value” circuit is
open
If values in test 2 or 3 are close to zero diodes are
leaking
Auxiliary
transformers
secondary
connector