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<8. TROUBLESHOOTING>
8-2
IM 12E04A02-02E
9th Edition : Mar. 16, 2018-00
(2) Err12 (lamp disconnection)
Carry out checking in the following order.
Operation and checking procedure
Failure Mode and Corrective Action
1
Open the upper cover of the detector and confirm
whether the lamp is lit.
If it is not lit, a loosening of the P1 and P2 converter and
detector connection terminal screws is assumed.
=> Tighten them again securely.
2
If there is no problem with the terminal screws being
loose, disconnect the wiring to converter connection
terminals P1 and P2, and measure the resistance
between detector connection terminals P1 and P2.
If the resistance goes to infinity, it shows the lamp
filament has burned through.
=> Replace the lamp with the spare lamp as an
necessary.
=> After replacing the lamp, perform “lamp control
reference value calibration” and “span calibration”.
3 If the lamp is lit, measure the DC voltage across the
converter connection terminals [S2 (+) and AG(-)].
If the measured voltage is within ±0.5 V, a failure of
the lamp light quantity control receiving element is
assumed.
=> Request checking and/or repair of the control
preamplifier.
(3) Err13 (lamp voltage failure)
Carry out checking in the following order.
Operation and checking procedure
Failure Mode and Corrective Action
1
Measure the DC voltage across the converter
connection terminals [P1(+) and P2(-)] and confirm
that it exceeds the range of +3 to +6 V.
2
Check for short-circuiting between the converter and
detector connection terminals P1 and P2.
As the lamp power supply circuit has the function of
overcurrent protection, if shortcircuiting is eliminated,
the lamp voltage is restored by itself.
3 Check for loosening of the primary and secondary
connectors (CN7 and CN8) of the lamp power
transformer in the converter.
If there is loosening due to poor contact, the lamp
voltage is restored by itself by re-inserting the
connectors.
If there are no problems in checking listed above, a
failure of the lamp power supply circuit on the converter
analog board is assumed.
=> Request checking and/or repair of the analog board.
(4) Err14 (A/D circuit failure)
A failure of the A/D conversion IC or the measurement and comparison input circuits is assumed.
Request checking and/or repair of the converter CPU board.
(5) Err15 (memory comparison failure)
A data memory IC (EEPROM) failure is assumed.
Request checking and/or repair of the converter CPU board.
NOTE
If the power is turned off with a memory-comparison failure generated, the stored data are
initialized when the power is turned on again. If initialization is performed, re-setting of necessary
data, zero and span calibration for the input circuit, lamp control reference value calibration,
and turbidity zero and span calibration are required. If data cannot be properly written into the
memory, “Err17” is displayed to notify of a failure occurrence.
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