Help Displays; Troubleshooting - Miller XMS 403 Owner's Manual

5-2. Help Displays

.
All directions are in reference to the front
of the unit. All circuitry referred to is
located inside the unit.
Help 0
Indicates shorted thermistor RT2 on left side
of unit. Contact a Factory Authorized Service
Agent.
Help 1
Indicates a malfunction in the primary power
circuit. Contact a Factory Authorized Service
Agent.
Help 2
Indicates a malfunction in the thermal protec-
tion circuitry on left side of unit. Contact a
Factory Authorized Service Agent.
Help 3
Indicates overheating on left side of unit. Unit
will shutdown and fan will run until internal
temperature drops within operational range.

5-3. Troubleshooting

Trouble
No weld output: unit completely inopera-
tive.
No weld output; meter display On.
Erratic or improper weld output.
Coolant system not working (HELP 15
is displayed).
Reduced or no coolant flow from cool-
ing unit (HELP 15 can be displayed).
Control panel not functioning properly.
Software problems.
Help 4
Indicates a malfunction in the thermal protec-
tion circuitry on right side of unit. Contact a
Factory Authorized Service Agent.
Help 5
Indicates overheating on right side of unit.
Unit will shutdown and fan will run until inter-
nal temperature drops within operational
range.
Help 6
Indicates input voltage is too low and unit has
automatically shut down. Operation will con-
tinue when voltage is within an acceptable
lower range limit (15% below acceptable in-
put voltage). Contact an electrician to check
input line voltage.
Help 7
Indicates input voltage is too high and unit
has automatically shut down. Operation will
continue when voltage is within an accept-
able upper range limit (15% above accept-
able input voltage). Contact an electrician to
check input line voltage. HELP 7 may also in-
dicate a bus voltage imbalance.
Place line disconnect switch in On position (see Section 3-13).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-13).
Check for proper input power connections (see Section 3-13).
Verify welding parameter settings.
Verify Help messages and correction procedures as necessary.
Check, repair, or replace remote control.
Unit overheated. Allow fan to run and unit cool (see Section 3-4).
Use proper size and type of weld cable (see Section 3-9).
Clean and tighten all weld connections.
Check and secure coolant hose connectors.
Reset circuit breaker CB7 (see Section 3-11).
Motor overheated. Allow motor to cool and restart operation.
Have Factory Authorized Service Agent check cooling unit.
Add coolant.
Check for blockage at hoses.
Switch unit off and back on again to verify LEDs and display status.
Reinstall factory parameters (see Section 4-2).
Contact a Factory Authorized Service Agent.
Help 8
Indicates a malfunction in the secondary
power circuit of the unit. Contact a Factory
Authorized Service Agent.
Help 9
Indicates a shorted thermistor RT1 on right
side of unit. Contact a Factory Authorized
Service Agent.
Help 15
Indicates a malfunctioning cooling unit. Unit
will shut down immediately. Turn off primary
power. Check and repair cooling unit compo-
nents as necessary. Unit will operate when
power to unit is turned off and back on.
Help 50
Indicates an overload at the power module.
Reduce weld parameter settings and/or duty
cycle. If error continues, contact a Factory
Authorized Service Agent.
Remedy
OM-244 243 Page 29