Troubleshooting the E-6A Error Code Temp Probe Open

Overview

If an RTD has an open circuit failure, then the system will generate the E-6A error code. Error text will indicate either the top shelf probe, bottom shelf probe, ambient or heat sink failure. Shelf will be disabled from use. Upon resolution, the shelf will be enabled for usage, all product on that shelf will transition to discard status.

Call Avoidance

Perform this step first to avoid travel to the restaurant, reducing cost and adding value for your customer. Turn the main power switch off for a few moments, and then turn it back on. Wait. If the issue doesn't resolve itself, continue the troubleshooting steps below, on-site.

Field Troubleshooting

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

1. Remove power from unit by unplugging the main power cord.

2. Remove the top cover of the unit to gain access to the electrical components.

3. Remove the left side panel (when facing the front) to gain access to heater probe wiring.

   

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4. Behind the left side panel, check the suspected probe connections for the heaters at the 2 pin connectors and the main connector at the I/O board.

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5. For the heat sink probe, check the connector at the I/O board and the wiring.

6. Unplug and plug back in connectors to clean contacts.

7. Reconnect power and turn on the main power switch.

8. Do one of the following:

   • If issue is not resolved, use a multimeter to check the resistance of the probe in question and determine if it is an open circuit.

   • If issue is resolved, do one of the following:

     1. If the shelf temperature probes are faulty, replace the heater assembly for them.

     2. If the heat sink probe was faulty, then replace heat sink probe.

9. If all probes check correctly, then replace I/O board.

Other Possibilities

• Check wiring and pins inside the connector to ensure proper contact when plugged in.

• Unplug the Heat Sink Probe connector from J9 at I/O board.

• Ohm out the probe using the RTD Chart below.

  • If the reading of the probe is within +/-5F of the heat sink probe surface temp reading, check for loose or faulty connection to I/O.

  • If connection is tight and a new probe produces same result, then replace I/O board.

  • If the ohm reading from the probe is +/- 5F from the surface temperature reading, replace probe.

RTD Chart

Temperature (Fahrenheit)	Temperature (Celsius)	Resistance Ohms
50	10,00	1 039,02
60	15,56	1 060,65
70	21,11	1 082,24
80	26,67	1 103,80
90	32,22	1 125,32
100	37,78	1 146,81
110	43,33	1 168,26
120	48,89	1 189,67
130	54,44	1 211,05
140	60,00	1 232,39
150	65,56	1 253,70
160	71,11	1 274,97
170	76,67	1 296,20
180	82,22	1 317,40
185	85,00	1 327,99
190	87,78	1 338,57
200	93,33	1 359,69
210	98,89	1 380,79
212	100,00	1 385,00
220	104,44	1 401,84
230	110,00	1 422,86
240	115,56	1 443,85
250	121,11	1 464,79
260	126,67	1 485,71
270	132,22	1 506,58
280	137,78	1 527,43
290	143,33	1 548,23
300	148,89	1 569,00
310	154,44	1 589,73
320	160,00	1 610,43
325	162,78	1 620,77
330	165,56	1 631,09
340	171,11	1 651,72
350	176,67	1 672,31
360	182,22	1 692,86
365	185,00	1 703,13
370	187,78	1 713,38
380	193,33	1 733,87
390	198,89	1 754,31
400	204,44	1 774,72
410	210,00	1 795,10
420	215,56	1 815,44
430	211,11	1 835,74
440	226,67	1 856,01