Troubleshooting the E-4 CPU Too Hot Error Code

Overview

The E-4 CPU Too Hot error occurs when the control board and microprocessor exceed 180°F (82°C). This error is detected by a temperature circuit within the control board. Proper troubleshooting can help avoid unnecessary service calls and ensure efficient field repairs.

Call Avoidance

To help the end user resolve the issue without a service call:

• Check Vents / Louvers, ensuring the vents or louvers on the side of the fryer are uncovered and clean. Remove any grease, dust, dirt, or debris.

• Verify correct spacing around the fryer. Spacing should be at least 1 in. (25 mm) at the rear of the fryer to allow proper airflow. If the error persists, despite clean vents and proper spacing, proceed to field troubleshooting.

Field Troubleshooting

If call avoidance steps do not resolve the issue, proceed with the following field troubleshooting steps.

Recommended Parts:

CFE 5XX Open Fryer Series

• Control board

Recommended Tools:

• Basic hand tools (screwdrivers, pliers, etc.)

• Air Thermometer

Checking Temperatures

1. Review the control temperatures: enter the error log by selecting Menu > Info Mode > Error Log.

2. Temperature Check: verify the temperature of the control board. If it is below 180°F (82°C), replace the control board.