2. limit conditions, 3. limit condition codes – Miller Electric ProHeat 35 User Manual

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9-2. Limit Conditions

A limit condition indicates that the system has encountered an open thermocouple or is outside the range of its optimum operating conditions or

parameters. Should a limit condition occur during operation, the yellow Limit LED will flash to indicate a problem. If the active screen on the LCD display

is Run Status or Parameters, a message describing the particular limit condition will appear on the display. If the active screen is Program, press the

Run Status

button to display the limit condition.

In a limit condition, the power source will continue to deliver output power and protect itself from damage by reducing the output power. This situation

allows the operator time to determine the best action to correct the problem as described by the limit message on the LCD display.

If a limit condition occurs, there are two selectable options:

Acknowledge the limit and continue operation.

Terminate operation to correct the problem causing the limit.

Pressing the Decrease

button will acknowledge the limit and continue operation with the existing set up. In the acknowledge state, the yellow

Limit LED will stop flashing and remain on continuously. The LCD display will revert to an active screen once the Program

button, Run Status

button, or Parameters

button is pressed.

If a new limit condition should occur after the first is acknowledged, the yellow Limit LED will start flashing to indicate a new problem. To display the limit

condition, press the Run Status

button and the LCD display will show a message describing the new and previous limit messages.

To obtain additional information regarding the limit condition and suggested solutions to resolve the limit, press the Increase

button, and the

LCD display will indicate possible solutions based on the type of limit condition.

If the operator determines that the best course of action is to terminate operation and make suggested changes to the setup to eliminate the limit condi-

tion, press the Stop

button. After changes are made to the setup, press the Run

button to restart the process.

9-3. Limit Condition Codes

Limit Condition

Additional Information

L01: Thermocouple #1 Open