If your Miller Auto Deltaweld 350 welder shows HELP on its display and the red fault light is blinking, this article will help. Use it to look up your code (for example, DUTY 2501) and find out what to do.
What You'll See
HELPon the welder's left displayA word and a number taking turns on the right display — for example,
DUTY, then2501The red fault light blinking on the front of the welder
Welding may stop
Quick Fix
Most HELP TEMP and HELP DUTY faults mean the welder overheated or reached its duty cycle limit. Leave the welder turned on — the fan needs power to cool it. The fault clears on its own once the welder has cooled.
After it cools, weld at a lower amperage or take longer breaks between welds.
Find your code in the table below to confirm what it means.
Duty cycle is the percentage of each 10 minutes that the welder can weld at its rated load without overheating.
Important
Welding past the duty cycle limit can damage the welder and void the warranty.
Find Your Fault Code
The welder's left display shows HELP. The right display takes turns showing a word and a number. Find the word you see in the table below.
For example, if the right display takes turns showing DUTY and 2501, that is fault code 25 — the row marked HELP DUTY.
Some faults need repair by a Miller Factory Authorized Service Agent. Contact us first — tap the Support menu in Beacon to send us a message. We can help confirm the fault before you call Miller.
To find a Miller service agent, call 1-800-4-A-Miller or visit millerwelds.com.
The table below comes from Section 8-4 of the Miller Auto Deltaweld 350 Owner's Manual (PDF).
The last two digits of the number (the XX in the table) show the exact fault inside the welder. A Miller service agent uses them to repair the welder.
Code | Display Shows | What It Means |
1 |
| A problem in the primary power circuit. Contact a Miller service agent. |
2 |
| A problem in the thermal protection circuitry. Contact a Miller service agent. |
3 |
| The left side (secondary) of the welder overheated. The welder shut down so the fan can cool it. It starts working again once it has cooled. |
4 |
| The auxiliary circuit overheated. The welder shut down so the fan can cool it. It starts working again once it has cooled. |
5 |
| The right side (primary) of the welder overheated. The welder shut down so the fan can cool it. It starts working again once it has cooled. |
6 |
| The welder sensed a primary power circuit fault. |
7 |
| The welder sensed a primary power circuit fault. Turn the welder off for five minutes, then turn it back on. If the fault comes back, contact a Miller service agent. |
8 |
| A problem in the secondary power circuit. Contact a Miller service agent. |
9 |
| The relink board (PC8) is not set for your input voltage. See Configuring the Input Voltage on Auto Deltaweld 350. |
11 |
| A communication loss inside the welder. Turn the welder off, then back on. If the fault comes back, contact a Miller service agent. |
22 |
| A problem with the wire feed or the robot. Check the wire delivery and the robot's travel path. If the fault stays on, contact a Miller service agent. |
25 |
| The welder reached its duty cycle limit. Leave the welder on so the fan can cool it. The fault clears on its own once the welder has cooled. |
40 |
| The welder lost its connection to the robot, or the robot has an error. Check the interface cable between the robot and the welder at both ends. Check the cable for damage. If the fault stays on, contact a Miller service agent. See also Troubleshooting Fieldbus Communication Loss with Miller Deltaweld. |
Other codes |
| Check your wire feeder owner's manual. |
Still Need Help?
Tap the Support menu in Beacon to send us a message. It helps if you can share:
A photo of any error messages on the teach pendant or equipment
Your robot's serial number (printed on a label on the robot's base)
The word and number the welder's display shows (for example,
DUTYand2501)