Troubleshooting the E-19 Protection Probe Failed Warning

Overview

The E-19 error indicates an issue with the protection probe. The protection probe alerts the control to any abnormal heating activity that indicates a low oil level state. NOTE: The protection probe is the lowest probe in the vat.

This error typically points to a faulty protection probe or connection issue between the probe and the board, but in rare cases, it may be caused by a control board issue.

E-19 Errors

E-19A: Protection Probe is open (disconnected or broken).

E-19B: Protection Probe is shorted (electrically shorted).

Call Avoidance Steps

NOTE: When the E-19 error displays, this error can be acknowledged, and cooking can continue, however the error will display every 4 hours until repaired.

Field Troubleshooting

Recommended Parts

CFE 5XX Open Fryer Series

• Bottom probe

• Control board

Recommended Tools

• Multimeter

• Electrical contact cleaner

• Oil thermometer

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

Troubleshooting Instructions

1. Inspect the probe.

   • Make sure drain pan is in place and empty. Drain down the oil from the vat.

   • Inspect the probe to make sure the guard and probe are not damaged or broken.

   • Replace probe if damaged, otherwise proceed to Step 2.

2. Lower the control board.

   • At the rear of the control board, disconnect power by unplugging the connector at P2.

3. Access the probe connection.

   • Unplug the probe harness P3 from the control board.

4. Measure probe resistance.

   • Use a multimeter to measure the resistance (ohms) of the level sensor P3 pins 7 and 8. NOTE: This probe is noted as the "bottom probe" from the decal on the rear of the control.

5. Measure temperature near level probe.

   • Use a thermometer to measure either the oil temperature near this probe or the air temperature near this probe if it is not touching oil.

6. Compare reading with Reference Chart.

   Compare your resistance reading with the 1k-ohm chart based on the current oil temperature:

   • If the reading is open (infinite resistance) or if the reading is outside an expected oil temperature range of resistance or fluctuating greatly, replace the temperature probe.

   • If the reading is within range, proceed to Step 7.

7. Check probe connection.

   If the probe reading is accurate, use a contact cleaner on the probe connections and ensure the probe is securely connected to the control board. If this does not correct the issue, proceed to Step 8.

8. Replace control board.

   In the rare case the probe is good, and the connections are clean and secure, but the E-19A or E-19B error persists:

   • Replace the control board.

Other Possibilities

• In rare cases, the issue may be due to a damaged wire harness or intermittent connection. Inspect the wiring for visible damage or loose pins. The probe will need to be replaced if the wiring is damaged.

• In the rare case that the fryer does not have a protection probe and produces an E-19A or E-19B error, step T-36 "Has Protection Probe" setting in tech mode can be set to "NO" to prevent false E-19 errors from occuring.