YOKOGAWA ZR202S, User Manual, Page: 142 / 163

<12. Troubleshooting>
12-1
IM 11M13A01-04E
12. Troubleshooting
This chapter describes errors and alarms detected by the self-diagnostic function of the converter. It
also describes the check and remedies when problems other than the above occur.
12.1 Displays and Remedies When Errors Occur
12.1.1 Error Types
An error is detected if any abnormality is generated in the detector or the converter, e.g., in the cell
(sensor) or heater in the detector, or the internal circuits in the converter. If an error occurs, the
analyzer performs the following:
(1) Stops the supply of power to the heater in the detector to insure system safety.
(2) Causes an error indication in the display to start blinking to notify of an error generation
(Figure 12.1).
(3) Sends a contact output if the error (Parameter code E20) is set up for “Contact output setting” for
that contact (refer to Section 8.5, “Contact Output Setting”).
(4) Changes the analog output status to the one set in “Output hold setting” (refer to Section 8.3,
“Output Hold Setting”).
The content of errors that are displayed include those shown in Table 12.1.
Displayed alternately
Err-01 ---------
F12-1E.ai
Figure 12.1
Table 12.1 Types of Errors and Reasons for Occurrence
Error No. Type of error Reason for Occurrence
Err-01 Cell voltage failure The cell (sensor) voltage signal input to the converter falls below
-50 mV.
Err-02 Heater temperature failure The heater temperature does not rise during warm-up, or it falls
below 730°C or exceeds 780°C after warm-up is completed.
Err-03 A/D converter failure The A/D converter fails in the internal electrical circuit in the
converter.
Err-04 Memory failure Data properly are not written into memory in the internal electrical
circuit in the converter.