Troubleshooting an E-10 High Limit Error Code

To avoid electrical shock or property damage, disconnect power before installing or servicing equipment. A qualified technician must perform the service procedures.

Overview

E-10 errors indicate a High Limit Safety System fault. The high limit system protects the fryer from overheating. All E-10 errors are critical errors and will shut down cooking operations for the affected vat until the issue is resolved.

Overheat Trip Point:

• 430°F (221°C)

E-10 Error Codes:

• E-10 - High Limit Safety Sensor Overheat

  • High limit trip point exceeded 430°F (221°C).

• E-10A - I, V, and W - High Limit Board Failure

  • Internal High Limit Board Failure.

• E-10M - High Limit Board Mismatch

  • Incorrect High Limit Board installed.

• E-10N - High Limit Board Not Connected

  • High Limit Board is disconnected or has a loose connection.

• E-10P - High Limit Probe Open or Shorted

• E-10R - High Limit Reset Switch Stuck Closed

  • High Limit Reset Switch remains closed for more than 30 seconds.

• E-10T - High Limit Probe Temperature Mismatch

  • High Limit Probe internal temperature readings differ by more than 63°F (35°C).

Call Avoidance Steps

Before dispatching a service technician, attempt the following:

1. Verify there is oil in the vat. There could be situations where the filtration process has failed and did not pump the oil back up properly. Filtration troubleshooting may be needed.

2. If there is oil in the vat, let the oil cool down. Temperature of probe must be below 374°F (190°C) before it will allow a reset.

3. Open the fryer door.

4. Locate the red High Limit Reset Switch underneath and behind the door.

5. Press and hold the reset switch for 5 seconds.

6. Restore operation and monitor the fryer.

7. If the error clears and does not return, normal operation may resume.

8. If there are continued nuisance E-10s, verify the oil level is not low and recommend a deep clean of the vat before servicing.

Field Troubleshooting

Troubleshooting Steps

E-10 (No Letter) Overheat Condition

1. Verify whether the fryer experienced an actual overheating condition.

2. Let the vat cool down. Reset temperature of probe must be below 374°F (190°C) before it will allow a reset.

3. Reset the high limit switch by pressing and holding the red reset button for 5 seconds.

   • If the fryer operates normally, monitor operation.

   • If the error returns, inspect the temperature control system and high limit components:

     • Check Ohms of the high limit probe. The probe is a 100 OHM probe.

     • Verify there is no wire damage.

     • Replace probe.

   Refer to 100 Ohm Chart.

E-10A-I, E-10V, or E-10W

These errors indicate an internal High Limit Board failure.

1. Power cycle the fryer.

2. Restore power and check for the error.

   • If the error does not return, monitor operation.

   • If the error returns, replace the High Limit Board.

E-10M High Limit Board Mismatch

1. Verify the installed High Limit Board is correct.

• The gas fryer uses a similar board as the electric fryer but has different software. The board should have HL-200 on it for gas. HL-100 is for electric fryers.

• Compare the installed part number with the approved service parts list.

  • If the part number is correct, inspect for installation issues and retest.

  • If the part number is incorrect, replace the High Limit Board with the correct part.

E-10N High Limit Board Not Connected

1. Inspect all connections between the High Limit Board and GMU.

2. Verify connectors are fully seated and not damaged.

   • If a loose connection is found, reconnect and retest.

   • If connections are good, swap the High Limit Board with a working board on another GMU on the fryer.

   Results:

   • If the error follows the High Limit Board, replace the High Limit Board.

   • If the High Limit Board works correctly on another GMU, replace the GMU.

   • If the issue is corrected after reconnecting, return the fryer to service.

E-10P High Limit Probe Open or Shorted

1. Inspect High Limit Probe wiring and connections.

2. Verify connections at the High Limit Board.

3. Measure probe resistance.

   • Check Ohms of the high limit probe. The probe is a 100OHM probe. Refer to 100 Ohm Chart.

   • If probe resistance is not correct, replace the high limit probe.

   • If probe resistance is correct, verify the high limit board is working properly and troubleshoot the board.

   • If High Limit board is working correctly, replace GMU.

E-10R High Limit Reset Switch Stuck Closed

1. Inspect the High Limit Reset Switch.

2. Verify the switch is not physically stuck.

3. Check wiring and switch operation.

4. Verify 24VDC is not passing through switch. Switch should be in an open state.

   • If the switch is stuck or damaged, replace the switch.

   • If the switch operates correctly, inspect associated wiring.

E-10T High Limit Probe Temperature Mismatch

• Internal Probe Sensor points differ by more than 35°C (63°F).

1. Inspect the High Limit Probe for carbon buildup and clean the probe or complete a deep clean procedure.

   • If the error clears after cleaning, return the fryer to service.

2. Check Ohms of the High Limit Probe. The probe is a 100OHM probe. Refer to 100 Ohm Chart.

• If the probe resistance is incorrect, replace the High Limit Probe.

• If the probe resistance is correct, replace the High Limit Board.

Other Troubleshooting

Intermittent Connection Issues

Loose, damaged, or corroded connectors between the High Limit Board and GMU may cause intermittent E-10N, E-10P, or E-10T errors.

Inspect all harnesses carefully.

Carbon or Debris on Probe

Heavy carbon buildup on the High Limit Probe may cause inaccurate temperature readings and generate E-10 faults.

Clean the probe by completing a deep clean procedure.

Incorrect Replacement Parts

Installing the wrong High Limit Board can generate E-10M errors.

Always verify the part number before installation.

Temporary Control Faults

Occasionally, a power interruption or control fault may cause an E-10 board error.

Performing a power cycle and high limit reset may temporarily clear the condition. If the error returns, replace the failed component as outlined above.