Table of Contents
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10-3. Help Displays
Display Example
HELP
HELP 1
HELP
HELP 2
HELP 3
HELP
HELP 5
HELP 6
HELP
HELP 8
HELP
HELP 25
10-4. Troubleshooting
HELP
Trouble
No weld output; unit completely
inoperative.
No weld output; meter display On.
25
HELP
Erratic or improper weld output.
No 115 volts AC output at optional du-
plex receptacle.
No 24 volts AC output at Remote 14
receptacle.
OM-231242 Page 46
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Complete Parts List is available at www.MillerWelds.com
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All directions are in reference to the front of the unit. All circuitry referred to is located inside the
unit.
1
Help 1 Display
Indicates a malfunction in the primary power circuit. If this display is shown, contact a Factory Author-
ized Service Agent.
2
Help 2 Display
Indicates a malfunction in the thermal protection circuitry. If this display is shown, contact a Factory
Authorized Service Agent.
Help 3 Display
Indicates the left side of the unit has overheated. The unit has shut down to allow the fan to cool it
3
(see Section 4). Operation will continue when the unit has cooled.
Help 5 Display
Indicates the right side of the unit has overheated. The unit has shut down to allow the fan to cool it
(see Section 4). Operation will continue when the unit has cooled.
Help 6 Display
Indicates operation at maximum input current. The unit has a maximum allowable input current limit.
5
As the line voltage decreases, the required input current increases. If the line voltage is too low, the
output power is limited by the input current. When this limit is reached, the unit automatically reduces
output power to continue operation. If this display is shown, have a qualified electrician check the in-
put voltage.
Help 8 Display
Indicates a malfunction in the secondary power circuit of the unit. If this display is shown, contact a
6
Factory Authorized Service Agent.
Help 25 Display
Indicates machine has reached duty cycle limits (see Section 4). Unit must be left on to power the
fan for cooling. Operation will continue when unit has cooled.
8
Place line disconnect switch in On position (see Sections 5-8 and 5-9).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Sections 5-8 and 5-9).
Check for proper input power connections (see Sections 5-8 and 5-9).
Input voltage outside acceptable range of variation (see Section 5-7).
Check, repair, or replace remote control.
Unit overheated. Allow unit to cool with fan On (see Section 4-9).
Use proper size and type of weld cable (see Section 5-2).
Clean and tighten all weld connections.
Check for correct polarity.
Reset supplementary protector CB1 (see Section 5-5).
Reset supplementary protector CB2 (see Section 5-5).
Remedy
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Table of Contents
Troubleshooting
