YOKOGAWA RC400G, Руководство пользователя

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<9. Troubleshooting>
9-7
IM 12F4A1-01E
This <failure> detection is carried out in a slightly longer frequency. Wait about 2 minutes to
confirm the recurrence of <failure>.
If <failure> is displayed again, perform the inspection following the flow chart of Figure 9.5.
End
Start
Is current display
“O.L”?
Is
temperature
display “O.L”?
NO
NO
YES
YES
F9.5.ai
Is
temperature
display “O.L”?
Failure in current
input circuit.
Failure in AD
conveter circuit.
Failure in temperature
input circuit.
Malfunctioning due
to noise, etc..
The converter must be
replaced.
YES
NO
It will seldom occur
as the equipment is
well protected
against noise.
Figure 9.5 Converter Failure Inspection Flow Chart
(5) Error code “Err15” (Converter failure)
<failure> of error code “Err15” is displayed when failure occurs in EEPROM memory storing
setup data.
When this <failure> is displayed, once reset the display and confirm if the <failure> is
detected again.
If <failure> display appears again, memory content initialization is necessary.
Memory content initialization is carried out by the procedure given below. Notice, however,
that when memory content is initialized, re-setup of calibration factor (for zero point and
span), adjustment factors for analog output and current input, etc. as well as setup data
becomes necessary. As setting except for the setup of calibration factor must be made in
“service mode”, contact Yokogawa when the <failure> described above has occurred.
(a) Once turn the converter power OFF.
(b) Turn power ON again. Display change as shown below.
(Power ON) => “CHEC” => “dFt” =>
with function code “1” in <MEAS.> mode
(momentary indication) (initialization: about 15 sec)
Note: Display of “Err17” when power is ON means that EEPROM itself is in an unusable condition.
(c) Reset <failure> display, and confirm that <failure> is not indicated again.
When memory contents in EEPROM is initialized, the stored setting date is also initialized.
(6) Error code “Err25” (Concentration upper limit setpoint exceeded)
Usually, independent display of error code “Err25” <failure> appears when chlorine
concentration in sample water exceeds the set value, but does not mean equipment failure.
14th Edition : Jul. 15, 2020