Troubleshooting - Miller Spectrum 300 Manuel Du Propriétaire

5-4. Troubleshooting

Trouble
No pilot arc; difficulty in establishing an Clean or replace worn consumables as necessary (see torch Owner's Manual).
arc.
No cutting output; Power light off; Place Power switch in On position.
Trouble lights off; Ready light off; fan
motor FM does not run.
No cutting output; Power light on; Be sure work clamp is connected.
Ready light on; Trouble lights off; fan
motor FM running.
No cutting output; Power light on; Reset Power switch.
Ready light off; Trouble lights off; fan
motor FM running.
No control of output.
No gas/air flow; Power light on; Ready
light on; Trouble lights off; fan motor FM
running.
Pressure Trouble light On; Ready light Check for correct gas/air pressure adjustment (see Section 4-1).
off.
Cup Trouble light On; Ready light off.
Temperature Trouble light On; Ready
light off.
Fan motor FM does not run; Power light
and Ready light both On.
Trouble lights not working.
OM-177 545 Page 20
Check for damaged torch or torch cable (see torch Owner's Manual).
Have Factory Authorized Service Agent check control relay CR6, power control board PC1, safety con-
trol board PC2, gas valve GS1, rectifier SR1, and check gas/air system for leaks.
Place line disconnect device in On position (see Section 3-5).
Check line fuse(s) and replace if needed or reset circuit breakers (see Section 3-5).
Have Factory Authorized Service Agent check power switch S1, input voltage selector switch S2, input
resistor R2, control relay CR6, safety control board PC2, and transformer T1.
Clean or replace worn consumables as necessary (see torch Owner's Manual).
Have Factory Authorized Service Agent check contactor W, control relay CR3, and safety control board
PC2.
Have Factory Authorized Service Agent check contactor CR7, control relay CR6, safety control board
PC2, input resistor R2, power control board PC1. Check for proper torch lead connections. Check op-
eration of gas valve GS1, and check gas/air system for leaks.
Check position of input voltage selector switch S2 (see Section 3-5).
Have Factory Authorized Service Agent check power control board PC1, and safety control board PC2.
Have Factory Authorized Service Agent check for proper torch connections, and check power control
board PC1. Check operation of gas valve GS1, and check gas/air system for leaks.
Check for sufficient gas/air supply pressure (see Section 3-4).
Check for dirty air filter/regulator and clean, if needed (see manufacturer's instructions).
Check torch shield cup (see Section 5-2).
Have Factory Authorized Service Agent check for proper torch connections, and check safety control
board PC2.
Thermostat TP1 open (overheating). Allow fan to run; the thermostat closes when the unit has cooled
(see Section 3-2).
Have Factory Authorized Service Agent check safety control board PC2 and transformer T1.
Have Factory Authorized Service Agent check fan motor connections.
Have Factory Authorized Service Agent check safety control board PC2.
Remedy