What to do if my Miller Subarc DC 1250 has no weld output and the power switch light is off?
First, ensure the line disconnect device is in the On position. Next, check for any open line fuses and replace them if necessary. Verify that the input power connections are properly connected and the jumper link is in the correct position. Finally, inspect fuse F1 and replace it if it's blown.
What to do if my Miller Power Supply has no weld output but the power switch light is on?
If the unit has overheated, allow it to cool down with the fan on. If you are using a remote control, ensure the Output (Contactor) switch is in the Remote position and the remote control is properly connected. If not using a remote, put the switch in the On position. If the issue persists, check, repair, or replace the remote device.
Why is my Miller Subarc DC 1250 Power Supply fan not operating?
Check for any obstructions that might be blocking the fan's movement and remove them. If there are no obstructions, have a Factory Authorized Service Agent check the fan motor.
What to do if my Miller Subarc DC 1250 Power Supply has no weld output, the power switch light is on, and the fan is off?
First, check that the input power connections are properly connected. Next, check for any open line fuses and replace them, or reset the circuit breaker if it has tripped. If the problem continues, turn the power switch off and then back on. If there is still no output, have a Factory Authorized Service agent inspect the SCR’s.
Why does my Miller Subarc DC 1250 Power Supply have limited weld output and low open-circuit voltage?
Check the position of the Remote Amperage/Voltage Control switch. Also, check for any open line fuses and replace them if necessary. Ensure that the input power connections are properly connected and that the jumper link is in the correct position. Finally, clean and tighten all weld output connections.
Why does my Miller Subarc DC 1250 provide only maximum or minimum weld output?
Check the position of the Remote Amperage/Voltage Control switch. If the issue persists, have a Factory Authorized Service Agent check the control board PC1 and hall device HD1.
What causes erratic or improper weld output on my Miller Subarc DC 1250?
Ensure you are using the correct size and type of weld cable. Clean and tighten all weld connections. Also, check the wire drive installation according to the Owner’s Manual. If the issue remains, have a Factory Authorized Service Agent check the control board PC1 and hall device HD1.
What to do if there is no 24 volts AC output at Remote receptacle RC1 on my Miller Subarc DC 1250 Power Supply?
Reset the supplementary protector CB2.
Details potential dangers and safety measures related to arc welding.
Lists detailed technical specifications for the power source models.
Explains duty cycle ratings and precautions against overheating.
Provides guidance for electrical service and input power requirements.
Details how to adjust jumper links for different input voltages.
Guides on selecting appropriate weld cable sizes based on amperage and length.
Outlines the basic setup and connections for Sub Arc welding.
Describes the functions of the power source controls and indicators.
Lists and explains system help codes for troubleshooting issues.
Provides a table of common problems and their remedies for the power source.
General| Duty Cycle | 100% |
|---|---|
| Efficiency | 85% |
| Protection Class | IP23 |
| Cooling Method | Forced air |
| Rated Output | 1250 A at 44 VDC, 100% duty cycle |
| Polarity | DC |
| Output Current Range | 150-1250 A |
| Weight | 985 lb (447 kg) |
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