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HOUNO B Series - Troubleshooting Error Codes 6 and 7

HOUNO B Series
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TROUBLESHOOTING ERROR CODES
46 SERVICE MANUAL
REVISION 04/19, SW: 3.51
Error Code 7
The temperature sensor in the oven chamber is broken. The oven cannot be used
until the error has been corrected.
Steps Checklist Solution
1 Go to the test menu (oven) to see which
temperature is displayed.
2 Check the cable and the cable plugs and
change the plug if necessary.
3 Test the sensor using an ohmmeter,
and check whether the value matches
the value in the table and the current
temperature.
If not, change the sensor.
4 - Change the I/O board.
Error Code 6
The drain temperature has been above 75°C/167°F for more than five minutes. It is
normally kept below 60°C/140°F.
Steps Checklist Solution
1 Check that the water is turned on.
2 Check that the water supply connected
to the oven is cold and not hot.
3 Check that the solenoid valves is
functional.
If not, change the solenoid
valve.
4 Check whether the temperature sensor
is broken. Measure the real temperature
and compare it to the temperature
measured by the test function.
If broken, change the sensor.
5 Clean the jet and the solenoid valve at
the drain, and then check the temper-
ature again.

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