Miller Weldmaster Triad Extreme, Manual

Page: 20 / 50

Instruction Manual
Page 20
11.0 Troubleshooting
Condition Possible Cause Corrective Action
Wedge doesn’t heat Fuse blown
Heater failed (220 Volt)
Control or relay failure
Loose wire
Diagnose wedge
Replace fuse
Replace wedge
Diagnose and replace control
Check wiring contacts
No drive, motor hums Chain break/binding
Pinch roller bearings
U joint shaft
Motor gears stuck (rare)
Find and repair or adjust failed chain
Replace bearings/shaft
Rebuild U joint shaft
Repair or replace motor
No drive, motor quiet Motor fuse failed caused by fabric or me-
chanical binding
Controller failure (usually associated with
control fuse blown)
Correct cause of binding
Replace fuse
Diagnose and replace controller
Wedge temp unsta-
ble
Controller programming
Heater failure (120 Volt)
Thermocouple failure
Reconfigure control.
Diagnose and replace wedge
Fuse blows (heater) Heater short or ground fault
Incorrect fuse value
Diagnose and replace wedge
Replace with correct fuse
Fuse blows (control) Controller failure
Short circuit or other wiring problem
Diagnose and replace failed control
Diagnose and correct wiring
Temp control display
blank, ER 4 (Triad) or ER in
(Spec)
No thermocouple signal
Thermocouple failure
Plug in and test wedge
Replace wedge
Check internal T/C wire
Temp control display
shows other ER code
Triad control (935) all errors are T/C based,
Spec control (SD) see control manual
Plug in and test wedge
Check control configuration
Only one pinch roller is
turning
Chain failure (Triad)
Belt failure (Spec)
Gear or sprocket spun
Repair or replace belt or chain
Replace shaft assembly
Pinch roller handle doesn’t
lift completely
Cam roller at apex of travel in cam plate Rotate wedge height adjustment bolt about
180° and readjust wedge center
CHAPTER 11 TROUBLESHOOTING