Troubleshooting - Miller Multimatic 200 Owner's Manual

Message
SHORTED 6-PIN REMOTE
ERROR
BRIDGE CURRENT ERROR
PRIMARY THERMISTOR
ERROR
SECONDARY THERMISTOR
ERROR
PRIMARY VOLTAGE ERROR
PRIMARY CURRENT ERROR
PRIMARY BOOST NOT READY

7-5. Troubleshooting

Trouble
No weld output; unit completely
inoperative.
No weld output; unit is on.
Erratic or improper welding arc or
output.
Fan not operating.
Stick welding problems: Hard starts;
poor welding characteristics; unusual
spattering.
TIG welding problems: Wandering arc;
hard starts; poor welding characteris-
tics; spattering problems.
TIG welding problems: Tungsten
electrode oxidizing and not remaining
bright after welding.
OM-253392 Page 40
.
A complete Parts List is available at www.MillerWelds.com
Error
The 6-pin remote has been held down on power up,
or the remote has been held too long without initiat-
ing an arc.
Too much current has passed through the inverter
bridge circuit of the unit.
The primary circuit thermistor is reading too high or
too low for a valid temperature.
The secondary circuit thermistor is reading too high
or too low for a valid temperature.
The primary voltage has exceeded the maximum
allowable limit.
Too much current has passed through the primary
circuit of the unit.
The primary boost has not successfully been
established.
Place line disconnect switch in On position.
Check and replace line fuse(s), if necessary, or reset supplementary protector.
Be sure power cord is plugged in and that receptacle is receiving input power.
Check and secure loose weld cable(s) into receptacle(s).
Check and correct poor connection of work clamp to workpiece.
Unit overheated causing thermal shutdown. Allow unit to cool with fan On (see Sections 4-7, 4-8, and
4-9).
Reduce duty cycle or amperage.
Check and correct blocked/poor airflow to unit (see Section 5-1).
Turn Power Off and back On again. If light continues to flash, check with Factory Authorized Service
Agent.
Line voltage too high or too low. Line voltage must be within 10%
Remote trigger left on. Turn off remote trigger, wait five seconds, and restart operation.
Use proper size and type of weld cable (see your Distributor).
Clean and tighten weld connections.
Verify electrode polarity; check and correct poor connections to workpiece.
Unit not warmed up enough to require fan cooling.
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor and control circuitry.
Use proper type and size of electrode.
Verify electrode polarity; check and correct poor connections.
Make sure a remote control is not connected.
Use proper type and size of tungsten.
Use properly prepared tungsten.
Verify electrode polarity.
Shield weld zone from drafts.
Check for correct type shielding gas.
Check and tighten gas fittings.
Verify electrode polarity.
Remedy
Release the 6-pin remote.
Cycle the power to clear this error. If this error
persists after a power cycle, contact Miller Electric
Mfg. LLC service department.
Contact Miller Electric Mfg. LLC service
department.
Contact Miller Electric Mfg. LLC service
department.
Reduce the primary voltage to an acceptable level.
Cycle the power to clear this error. If this error
persists after a power cycle, contact Miller Electric
Mfg. LLC service department.
Cycle the power to clear this error. If this error
persists after a power cycle, contact Miller Electric
Mfg. LLC service department.
Remedy
.