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9
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
Summary of Contents for MCO-GD-10M
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