Miller Electric Legend AEAD-200LE Technical Manual page 29

Engine does not go to weld rpm with
Engine Control switch S2 in Run position.
Connect meter (DC) between
terminals D (+) and E (–).
Start engine. Place Engine
Control switch S2 in Run position.
Prior to Serial No. JH300534,
move Weld/Power switch S1 to
Weld position.
+12 volts dc present?
YES
Connect meter (DC) between
terminals C (+) and E (–).
+12 volts dc present?
YES
Check circuit breaker CB4, throttle
solenoid TS1 connections and
linkage, and control relay CR2.
Reinstall cover.
Miller Legend
Check connections
NO to Engine Control
switch S2 and
ground connection
(lead 33).
NO
Replace idle
board/module
PC1
Control Relays CR3 and CR4 do not
energize at idle rpm (See Section 5 for
CR3 and CR4 information)
Connect meter (DC) between
terminal A (+) and F (–) prior to
Serial No. JH300534, or B (+) and
F (–) effective with Serial No.
JH300534.
Start engine. Place Engine
Control switch in Run position.
0 (zero) volts dc present?
YES
Place Engine Control switch S2
in Run/Idle position.
+12 volts dc present?
YES
Check control relays
CR3 andCR4.
Reinstall cover.
NO
Replace idle
board/module
PC1
NO Replace idle
board/module
PC1
TM-428 Page 25