Hach-Lange FILTRAX User Manual - Manual (Page 52)

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Faults, causes, rectification
7.3 Faults
Text is displayed, the red signal lamp is active and the fault
relay contact is set. Action must be taken immediately!
7.4 Voltage drop (power failure)
On a power failure both relay contacts are closed (warning
and fault signalling).
FAULT CAUSE RECTIFICATION
FAULT
PHOTOMETER
Electronic fault or
no measurable sample flow rate (e.g. valve faulty,
air bubbles due to lack of sample)
Check sample flow rate, if necessary clean sample
pipe, call customer service
WARM UP MODE!
The temperature in the housing is <1 °C, the
instrument is warming up
Wait until the heater has raised the temperature in
the housing to > 1° C, the warm up phase then takes
a further 30 min. Keep door closed!
FAULT SAMPLE
The amount of sample from a module is below the
threshold set under [FAULT < ] Check all tubes and pumps, if necessary clean filter
modules and sample pipe
FAULT DEVICE
Serious electronic fault / bus fault
Normal operation is no longer possible!!
Unplug from the mains for 1 min, if the fault is still
present
Call customer service
TEMP.SENSOR
Temperature sensor faulty or not fitted
Normal operation is stopped because it is no
longer possible to regulate the temperature!
Check connection to temperature sensor,
Call customer service