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7.3.6.3 Common Failures and Recommended Actions
Failure Description Possible Cause Recommended Action
After [Start] is selected,
the prompt message
indicating calibration
failure is displayed very
soon.
An “O2 Sensor Disconnected”
alarm is displayed, indicating that
the O2 sensor is not connected.
Connect the O2 sensor.
The O2 supply pressure is
insufficient (smaller than 200 kPa).
Change or connect the gas
supply to ensure that the O2
supply pressure is sufficient.
21% O2 calibration is not complete
before 100% O2 calibration is
performed.
Perform 100% O2 calibration
after completing the 21% O2
calibration.
The prompt message
indicating calibration
failure is displayed three
minutes after calibration is
started.
The O2 sampling value is not
within the normal range. That is,
the 21% O2 sampling value
exceeds the range of 3586 to 9140,
and the 100% O2 sampling value
exceeds the range of 9602 to
35727. You can select [Setting] >
[Maintenance] > [Diagnosis
Data] > [VCM] to check the O2
sampling value.
Replace the O2 sensor.
Error Code Description Recommended Action
00000002 The O2 supply pressure is
insufficient. During 100% O2
calibration, the O2 pressure
supply is insufficient.
Check whether the cable connection of the
O2 sensor is proper.
Check the O2 pressure.
Check whether the output voltage of the
O2 sensor in the calibration menu is
stable.
Replace the O2 sensor.
00000004 The O2 sensor is
disconnected.
Check whether an “O2 Sensor
Disconnected” alarm is displayed on the
interface. If the alarm is displayed, check
whether the cable connection of the O2
sensor is in proper condition.
Check whether the output voltage of the
O2 sensor in the calibration menu is
stable.
Replace the O2 sensor.
00000008 The 21% O2 calibration value Check whether the cable connection of the
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