YOKOGAWA RC400G, Руководство пользователя

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<9. Troubleshooting>
9-8
IM 12F4A1-01E
“Err25” <failure> therefore serves as a common “upper limit alarm”. However, <failure>
output is not reset even when chlorine concentration reduces below the set value. Reset the
display by the error resetting operation (see subsection 5.3.3 (9)).
(7) Error code “Err16” or “Err17” (Converter failure)
<failure> of error code “Err16” or “Err17” is detected only a moment immediately after power
has been supplied to the converter.
When this <failure> is displayed, turn off power once.
If <failure> display (see Figure 9.6) is observed when power is turned ON again, RAM or
EEPROM is defective. Replace the circuit board assembly carrying these components.
“CHEC” => “Err16” (defective RAM)
(momentary indication)
“CHEC” => “dFt” => "Err17" (defective EEPROM)
(momentary indication) (indicated for about 15 sec
Initial values are written.)
Figure 9.6 Error Display in Power ON
When memory contents in EEPROM is initialized, the stored setting date is also initialized.
9.2 Operation Failures in Measurement Without
<failure> Detection
Phenomena which hamper normal measurement, such as measured value fluctuation, can take
place without detection of <failure>. Possible failure symptoms, causes and corrective actions
are described in Table 9.3.
14th Edition : Jul. 15, 2020