MULTIQUIP DLW400ESA4 Operation Manuals page 59

WELDER-GENERATOR — TROUBLESHOOTING (CONT.)
Symptom
Engine cannot be restarted from idle
stop.
Engine cannot be restarted from idle
stop. ("IdS" and preset current value are
indicated alternately on welding current
meter and indicator lamp on idle stop
monitor is blinking.)
Engine RPM fluctuates higher or lower
during welding.
AC power is not available.
DLW400ESA4 WELDER/GENERATOR • OPERATION MANUAL — REV. # 0 (03/14/18) — PAGE 59
Table 29. Troubleshooting (Welder-Generator)
Possible Problem
Idle Stop switch is set to OFF?
Short-circuit and release between
welding material and welding
electrode cannot be detected twice
or more?
Main circuit breaker (CB1) and
auxiliary AC circuit breakers
(CB2, CB3 and CB4) are set to the
ON position?
Side door open?
ON/OFF power switch from
load (power tool) connected to
120V GFCI receptacle cannot be
detected twice or more?
Automatic control of engine
revolutions responding to welding
output and preset frequency of AC
power in use is functioning?
Semiconductor is overheated?
AC circuit breakers are not set to
ON?
Solution
Make sure Idle Stop switch is in the ON
position, then push the Engine Start button
to start engine.
If welding electrode and surface of welding
material conduct current poorly due to
rust or coating, or if welding electrode is
continuously short-circuited by pressing it
onto welding material, or if tapping intervals
are too short or too long, voltage varying
signal for restart may not be detected.
"IdS" indication blinks on the welding
current meter while welding electrode is
being short-circuited.)
Place all circuit breakers to OFF position.
AC Load lamp on idle stop monitor blinks if
AC auxiliary circuit breakers are ON.
Close side door. Side Door Open lamp
on idle stop monitor blinks if side door is
open.
If power switch of the load connected to
output receptacle remains ON, AC Load
lamp on idle stop monitor blinks to prevent
restart for safety. Set switch to ON then OFF
twice or more and wait with switch in OFF
position until engine restarts.
If E-mode switch is set to Variable/Low
position, engine revolutions are controlled
based on preset value of welding current.
Engine revolutions are adjusted up or down
to meet total output for 2 operators.
If AC power is used by 2 persons
simultaneously, engine will operate at high
speed because preset AC frequency is
outputted.
If the side-door is open or exhaust vents
are clogged, causing insufficient cooling; if
semiconductors are heated at an over-duty
rate, output is limited to prevent such
overheating.
Place all circuit breakers CB1, CB2, CB3,
and CB4 to the ON position.