YOKOGAWA RC400G, User Manual

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<9. Troubleshooting>
9-4
IM 12F4A1-01E
(5) Error code “Err23” (response failure):
Reset the response failure detection limit at a larger value (referring to subsection 5.3.4 (4)),
and recalibrate the analyzer. If error is still displayed after changing the limit value, confirm
the applied voltage.
Measure the voltage between the connecting terminals ME and RE with a voltmeter of input
resistance 1 MΩ or mode with ME terminal positive and RE terminal negative.
When the voltage is stable in the range of ±20 mV, it is normal. If not, it is attributable to
a defective voltage applying circuit. Replace the circuit board assembly on which the
respective circuit is located.
9.1.2 <FAIL> Lamp Lit
Types of <failure> which turn on <FAIL> lamp and respective error codes are listed in Table 9.2.
“Err13”, “Err24” and “Err25” are detected only when “execution of failure detecting function” is
selected. When <FAIL> lamp is lit, confirm the error codes may be displayed simultaneously.
Table 9.2 Types and Error Codes of <failure> which are followed by <FAIL> Lamp Lighting
Error Code Type of <failure> Resetting <failure> Display
Err11
Err12
Err13
Err14
Err15
Err24
Err25
Concentration range exceeded
Sample temperature failure
Out-of-sample in the measuring tank
Converter failure (AD circuit failure)
Converter failure (Memory comparison failure) *1
Temperature compensation range exceeded
Concentration upper limit setpoint exceeded
Can be reset by the operation
described in subsection 5.3.3 (9).
*1: Once turn OFF and then ON power for reseting error display.
(1) Error code “Err11” (Concentration range exceeded), Error code “Err25”
(Concentration upper limit setpoint exceeded)
Reset error once using the operation of subsection 5.3.3 (9).
If <FAIL> lamp lights again after resetting the error, perform the following inspection.
However, on simultaneous occurrence of “Err11” and “Err14”, conduct the inspection
“Err14”.
(a) Calibration of zero point or span may have been performed incorrectly. Perform calibration
again.
After calibration, operate resetting of <failure> display.
(b) If <FAIL> lamp lights even after operation (a) above, failure of the temperature sensor built
in the counter electrode is considered to be the cause of the abnormally (temperature is not
compensated correctly). Conduct inspection following the inspection flow shown in Figure
9.3.
14th Edition : Jul. 15, 2020