Miller Electric UPC 838 manual Troubleshooting, Trouble Remedy

6-4. Troubleshooting

	Trouble		Remedy
No pilot arc; difficulty in establishing an		Clean or replace worn consumables as necessary (see torch Owner’s Manual).
arc.
		Check for damaged torch or torch cable (see torch Owner’s Manual).
No cutting output; Power light off;		Place Power switch in On position.
Trouble lights off; Ready light off; fan mo-
tor FM does not run.
		Place line disconnect device in On position (see Section 4-7).
		Check line fuse(s) and replace if needed or reset circuit breakers (see Section 4-7).
Pilot arc working; no cutting output; Pow-		Be sure work clamp is connected.
er light on; Ready light on; Trouble lights
off; fan motor running.
		Clean or replace worn consumables as necessary (see torch Owner’s Manual).
No gas/air flow; Power light on; Ready		Have Factory Authorized Service Agent check for proper torch connections. Check operation of gas
light on; Trouble lights off; fan motor		valve GS1, and check gas/air system for leaks.
running.
Pressure Trouble light On; Ready light		Check for correct gas/air pressure adjustment (see Section 5-2).
off.
		Check for sufficient gas/air supply pressure (see Section 4-5).
		Check for dirty air filter/regulator and clean, if needed (see manufacturer’s instructions).
		Check air lines for leaks.
		Have Factory Authorized Service Agent check pressure switch and control board.
Cup Trouble light On; Ready light off.		Check torch shield cup (see Section 6-3). Reset power switch.
		Have Factory Authorized Service Agent check for proper torch connections.
Temperature Trouble light On; Ready		Inverter heat sink or output heat sink overheating. Allow fan to run; the Trouble light goes out when the
light off.		unit has cooled.
		Have Factory Authorized Service Agent check control board.
Trouble lights not working.		Have Factory Authorized Service Agent check unit.
Power light flashing, Trouble lights off.		Reset power switch.

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