Troubleshooting the E-5 Error Code Shelf Temperature Too Hot

Overview

The E-5 error code will be generated when the shelf set point temperature is exceeded by 11° Fahrenheit or 6° Celcius for longer than 15 minutes. The shelf heater will automatically be disabled from use until the error is resolved. Upon resolution that shelf will transition to the discard status if a timer was selected when it failed. The shelf which has generated the fault will be indicated for its location in the error logs within the control.

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

1. Double check all of the steps from the Call Avoidance section.

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 wiring.

   

   White wires are to top heaters and black wires are to bottom heaters.

4. Check amp draw on the suspect heater. A faulty heater may have a higher reading than the others and be out of specification. (Specification is 1.29 amp-1.79 amps per heater.)

5. Do one of the following:

   1. If out of specification, replace the faulty heater assembly.

      

   2. If within specification, check amp draw on the heater when the LED light (on I/O board ) for that heater goes off. If there is still amp draw when the LED is not lit, then replace the I/O board.

Other Possibilities

Check to make sure that the temp probe is within specification when measuring resistance. Refer to the RTD Chart.

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