Miller Electric Maxstar 200 STR manual Troubleshooting Help Aids, Output LED High Temperature LED

6-3. Troubleshooting Help Aids

1

2

.All directions are in reference to the

front of the unit. All circuitry referred to is located inside the unit.

1Output LED

2High Temperature LED

The Output LED turns on when power is turned on. The LED is also used to indicate several machine malfunctions. When one of the malfunctions listed below occurs, the LED will first turn off for 1.5 seconds, and then it will begin to blink. The number of blinks corresponds to a Help message re- lating to that malfunction. After the LED blinks the appropriate number of times, the LED will again turn off for 1.5 seconds, and the sequence will start again.

The malfunctions that correspond to Help 2, 3, 4, 5, and 9 are thermal related. The High Temperature LED turns on along with the blinking Output LED.

A malfunction relating to Help 0 will cause the the Output LED to turn off and stay off, but the High Temperature LED turns on and

stays on.

Help 0 Display

Indicates a short in the thermal protection circuitry located on the bottom heat sink. Contact a Factory Authorized Service Agent if this happens.

Help 1 Display

Indicates a malfunction in the primary pow- er circuit caused by an overcurrent condi- tion in the primary IGBT switching circuit. Contact a Factory Authorized Service Agent if this happens.

Help 2 Display

Indicates an open in the thermal protection circuitry located on the bottom heat sink. Contact a Factory Authorized Service Agent if this happens.

Help 3 Display

Indicates the bottom heat sink has over- heated. The unit has shut down to allow the

fan to cool it (see Section 4-3). Operation will continue when the unit has cooled.

Help 4 Display

Indicates an open in the thermal protection circuitry located on the top heat sink. Con- tact a Factory Authorized Service Agent if this happens.

Help 5 Display

Indicates the top heat sink has overheated. The unit has shut down to allow the fan to cool it (see Section 4-3). Operation will con- tinue when the unit has cooled.

Help 8 Display

Indicates a malfunction in the secondary power circuit of the unit. There is a high open circuit condition. Contact a Factory Authorized Service Agent if this happens.

Help 9 Display

Indicates a short in the thermal protection circuitry located on the top heat sink. Con- tact a factory Authorized Service Agent if this happens.

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