Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 107)

105
Troubleshooting
Pump not working
(cationic applications).
Option not activated. Call a Service Technician.
Pump is not connected.
Verify the electrical connections and voltage. If
the voltage is around 70 volts change the
pump.
Instrument not in START mode.
Verify the instrument is in START mode. Stop
and restart.
System alarm activated. Check there is no system alarm.
Data on the screen cannot be
removed. Malfunctioning CPU board and/or some
other transmitter hardware is defective.
Make sure the electrode is properly connected.
Reset.
Program the instrument again.
If steps 1-3 do not remedy the problem, reset
the instrument by interrupting the power for
5-10 secs.
If problem cannot be solved, call the Service
Technician.
Alarm relays do not drop out.
Instrument was not properly
programmed. Check whether the relay parameters have been
properly programmed.
Hardware is defective.
Check that the programmed set points are
compatible with the programmed measuring
range.
Check the relay characteristics with an
ohmmeter.
If problem cannot be solved, call the Service
Technician.
Wrong output current, output
current remains at 0 or 20 mA.
Instrument was not properly
programmed.
Check the output-current parameters.
Defective connections of the Monec
display with peripherals.
Check cables.
Hardware is defective.
Compare the measured value with the
output-current measurement.
If problem persists, call the Service Technician
Output current not calibrated. Calibrate output current.
Table 10 General Faults
MALFUNCTION POSSIBLE CAUSE REMEDIES