YOKOGAWA EXAxt ZR22G, Руководство пользователя, Страница: 185 / 211

<12. Troubleshooting>
12-4
IM 11M12A01-02E 16th Edition : Mar. 19, 2020-00
n
Error3: A/D Converter Failure/Error4: Writing-to-memory Failure
• A/D Converter Failure
It is suspected that a failure has occurred in the A/D converter mounted in the electrical circuits
inside the converter.
• Writing-to-memory Failure
It is suspected that a failure has occurred in an operation writing to the memory (EEPROM)
mounted in the electrical circuits inside the converter.
<Locating the failure, and countermeasures>
Turn off the power to the converter once and then restart the converter. If the converter
operates normally after restarting, an error might have occurred due to a temporary drop in the
voltage (falling below 85 V, the least amount of voltage required to operate the converter) or a
malfunction of the electrical circuits affected by noise. Check whether or not there is a failure in
the power supply system or whether the converter and detector are securely grounded.
If the error occurs again after restarting, a failure in the electrical circuits is suspected.
Consult the service personnel at Yokogawa.
12.2 Displays and Remedies When Alarms are
Generated
12.2.1 Alarm Types
When an alarm is generated, the alarm indication blinks in the display to notify of the alarm
(Figure 12.3). Pressing the alarm indication displays a description of the alarm.
Alarms include those shown in Table 12.2.
Tag:
21.0
%O
2
17.42mA -Output1
17.42mA -Output2
F12.3E.ai
Tag:
Alarm 6 :Zero conc.ratio
F12.4E.ai
Figure 12.3 Figure 12.4