. A complete Parts List is available at www.MillerWelds.com
OM-265 363 Page 41
9-4. Troubleshooting Table For Power Source
Trouble Remedy
No weld output; unit completely
inoperative; power switch light off.
Place line disconnect device in On position (see Section 4-13).
Check for open line fuse(s), and replace if open (see Section 4-13).
Check for proper input power connections (see Section 4-13).
Check for proper jumper link position (see Section 4-12).
Check fuse F1, and replace if necessary (see Section 9-3).
No weld output; power switch light on. Unit overheated. Allow unit to cool with fan On (see Section 4-5).
If using remote control, place Output (Contactor) switch in Remote 14 position, and connect remote
control (see Sections 5-1 and 7-1). If remote is not being used, place switch in On position (see Sec-
tion 7-1).
Check, repair, or replace remote device.
No weld output; power switch light on;
fan off.
Check for proper input power connections (see Section 4-13).
Check for open line fuse(s), and replace if open, or reset circuit breaker (see Section 4-13).
Turn power switch off then back on. If no output condition remains, have Factory Authorized Service
agent check SCR’s.
Limited weld output and low
open-circuit voltage.
Check position of Remote Amperage/Voltage Control switch (see Section 7-1).
Check for open line fuse(s), and replace if open (see Section 4-13).
Check for proper input power connections (see Section 4-13).
Check for proper jumper link position (see Section 4-12).
Clean and tighten all weld output connections.
Unit provides only maximum or
minimum weld output.
Check position of Remote Amperage/Voltage Control switch (see Section 7-1).
Have Factory Authorized Service Agent check control board PC1 and hall device HD1.
Erratic or improper weld output. Use proper size and type of weld cable (see Section 6-1).
Clean and tighten all weld connections.
Check wire drive installation according to Owner’s Manual.
Have Factory Authorized Service Agent check control board PC1 and hall device HD1.
No 24 volts AC output at Remote re-
ceptacle RC1.
Reset supplementary protector CB2.
Fan not operating. Note: fan only runs
when cooling is necessary.
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
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