Frymaster GASFRYERSMODELS 35 - Manual (Page 31)

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1.7.4 Troubleshooting the Temperature Probe
Follow these guidelines to troubleshoot the temperature probe:
1. While it is still in the frypot, inspect the probe body for damage. Inspect the leads for fraying, burning,
breaks, or kinks. If the probe is bent, dented, or cracked, or if the leads are damaged, replace the
probe.
2. Determine the temperature of the cooking oil using a thermometer or pyrometer placed at the tip of
the probe.
3. Disconnect the 15-pin wiring harness from the interface board. Measure the probe resistance using J2
pins 13 and 14.
4. Resistance should approximately equal the given probe resistance for the corresponding temperature
on the chart in Section 1.6, Page 1-23. If not, the probe has failed and must be replaced. Probes cannot
be calibrated.
5. If the resistance matches the corresponding temperature on the chart, measure the resistance through
J2 pin 13 and ground. Then, through J2 14 and ground. If the resistance of each pin is 5 megaohms
or greater, the probe is working correctly. If the resistance is less than 5 megaohms, it has failed and
must be replaced.