Electronic Control Failure Codes, Temp | Garland MCO-GS-10M guide

ELECTRONIC CONTROL FAILURE CODES

The GARLAND digital control has a self-diagnostic program. If a problem occurs within the digital controller, you may see one of the "F" codes.

Below is a listing of the "F" codes with explanations:

-F1-Relay output is enabled when not cooking. If this failure code appears in the display, the cook relay may be on even if the control is not cooking. The control should be replaced.

-F2-Over temperature alarm. If this failure code appears in the display the control is sensing an oven temperature 50° or more above the maximum set temperature (500°). This failure may be caused by a faulty sensor.

Check the sensor connection for loose wires.

Replace the sensor and check for proper operation.

If failure continues replace the control.

-F3-Open sensor circuit. If this failure appears in the display, the control is sensing an open circuit at the sensor input. This failure is most often caused by a poor connection or broken sensor.

Check sensor connection and leads for broken wires of loose connections. Replace sensor and check for proper operation. If failure continues replace control.

-F4-Shorted sensor circuit. If this failure appears in the display, the control is sensing a short circuit at the sensor input. This failure is most often caused by loose wires at the connection of shorted sensor leads.

Check sensor connection and leads for loose wires. Replace sensor and check for proper operation. If failure continues replace control.

-F5-Relay outputs not enabled when cooking. If this failure appears in the display the control cannot turn the relays on even when cooking. The control should be replaced.

-F6-No 60 Hz input. The control does not sense the input power. This failure mode is most often the result of a failed component in the control. However, this failure may also be the result of a very noisy power line. Look for any large electrical noise producing machinery (such as mixers, compressors, dishwashers etc.). If possible, turn these machines off. Reapply power to the oven. If the failure repeats, replace the control. If the failure does not repeat, an electronic control may not work in this application because of noise. You must isolate the supply circuit.

-F7-The control has detected that calculated EEPROM check sum is not the same as the expected check sum retrieved from the EEPROM. When the control detects this error code, it will disable outputs before the alarm sounds.

RESISTANCE vs. TEMPERATURE CHART FOR INTERNAL OVEN TEMPERATURE SENSOR

The chart below will provide the Ohms at various temperatures. This will enable you to determine if the temperature probe is operable.

The chart is in Degrees Fahrenheit. How to use chart, for 350°, read down to 300 then across to 50, answer is 1654Ohms of resistance.

TEMP	0°	10°	20°	30°	40°	50°	60°	70°	80°	90°
0°	932	953	974	995	1016		1038	1059	1080	1101	1122
100°	1143	1163	1184	1205	1226		1247	1267	1288	1309	1329
200°	1350	1370	1391	1411	1432		1452	1472	1493	1513	1533
300°	1553	1574	1594	1614	1634		1654	1674	1694	1714	1733
400°	1753	1773	1793	1813	1832		1852	1871	1981	1911	1930
500°	1949	1969	1988	2008	2027		2046	2065	2085	2104	2123

ROBERTSHAW COM6000 CONTROLLER

MCO-GD-10M, MCO-GS-10E, MCO-GD-10E, MCO-GS-10M specifications

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