Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 211)

IM 11M12D01-01E 12-1
12. Troubleshooting
12. Troubleshooting
This chapter describes errors and alarms detected by the self-diagnostics function of the
averaging converter. It also explains inspections and remedies when other problems
occur.
12.1 Displays and Remedies When Errors Occur
12.1.1 Error Types
An error occurs when an abnormality is detected in the detector or averaging converter,
e.g., in the cell (sensor), detector heater, or internal circuits of the averaging converter.
An error (message and error contact) will not be canceled even after the cause of the
error has been removed. Follow the procedure below to cancel an error.
An individual channel error can be canceled by using the hot swap function, i.e., by
turning off/on the power to the channel where the error is occurring. An system error
can be canceled by turning off/on the main power. There are five types of errors as
shown in the table below.
Table 12.1 Error Types and Occurrence Conditions
T12.1E.eps
Error 5
Error Code Error Type Occurrence Conditions Unit
to be
Detected
Error 1 Cell voltage failure each channel
1) Heater temperature rise during warm-up is not more than
5
Њ C per 5 minutes.
2) Heater temperature during warm-up exceeds 780 ؇ C for
1.5 seconds or longer continuously.
3) After warm-up, heater temperature falls below 730
؇ C or exceeds
780 ؇ C for 10 seconds or longer continuously.
Error 2 Heater temperature failure
Error 3 Channel card failure
each channel
1) Failure is detected by memory check.
2) Communication failure occurs between card and A/D converter. each channel
Error 4 Control card failure System
Communication failure occurs between
control card and each channel. each channel Inter-card
communication failure
Failure is detected by memory check
Cell (sensor) voltage signal input to the converter falls
below -50 mV for 1.5 seconds or longer continuously.