Miller Electric Legend AEAD-200LE, Technical Manual

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TM-428 Page 18 Miller Legend
6-2. Troubleshooting Circuit Diagram For Welding Generator
Test Equipment Needed:
Resistance Values
a) Tolerance –
±
10% unless specified
b) Condition – 70
°
F (21
°
C); cold machine
(no warm-up)
c) Wiring Diagram – see Section 9
d) Stop engine before checking resistance
R1 29 ohms
R2 34 ohms
R3 35 ohms
R4 2 ohms
R5 2 ohms
R6 thru R17 Less than 1 ohm
R18 Pull: Less than 1 ohm Hold: 16.5 ohms
CR2 energized
Field current
at weld rpm
V14/R17
V15
V16/ V17/
R1 R2
I1 I2
V11,
V12,
V13/R12
V18
V19
R16 R15
R14
R13
Throttle
control relay
control relay CR3
and auxiliary power
control relay CR4
energized at
power/idle rpm
See Section
6-16 for R2 and
R4 adjustment
See Section 6-5
for PC1 data
R18