Hach BioTector B3500e User Manual page 143

107_COOLER FAULT
108_COOLER FAN FAULT
110_HI TEMP DUTYCYCLE
111_HI TEMP STANDBY
The current drawn through the Cooler
has dropped below 0.1 Amp for longer
than 5 seconds. This indicates cooler
peltier element failure.
Fuse 3 is blown on the
(for Cooler)
motherboard. See Section
System Fuse Specifications
details.
The monitoring voltage on the Cooler
Fan has dropped below 1.5 Volts or
has exceeded 3.5 Volts for longer than
5 seconds.
BioTector temperature has exceeded
50°C for longer than 2 minutes.
An analysis delay time of 300 seconds
has been introduced between each
analysis cycle.
When system temperature drops below
48°C for longer than 2 minutes,
BioTector continues normal operation.
BioTector temperature has exceeded
55°C for longer than 2 minutes.
BioTector has been automatically put
into standby mode and has stopped
analyzing.
When the temperature drops below
50°C for longer than 2 minutes,
BioTector continues operation as
described for "110_HI TEMP
DUTYCYCLE" above. When system
temperature drops below 48°C for
longer than 2 minutes, BioTector
continues normal operation.
Check fuse 3 (F3) on the
motherboard.
Check fuse holder and confirm
that the fuse is snapped in tightly
into the fuse holder.
5.2.4 Inspect the Cooler wiring on the
for green terminal block.
Check the wiring between the
Cooler and the Termination Board
81204370_01.
Go to Simulate menu and set
COOLER to 100%, the voltage on
the peltier element of the Cooler
should be 10 Volts.
Replace the Peltier Element and
the Cooler Fan.
Check the wiring between the
Cooler Fan and the Termination
Board 81204370_01.
Measure the voltage on the
Cooler Fan on the green terminal
block, it should be 24 Volts.
Replace the Cooler Fan.
Check the filters in the fan and
vent.
Check the operation of the fan.
(Note that at temperatures below
25°C, BioTector automatically
switches the fan off to stabilize system
temperature using its own internal
heat.)
Check ambient temperature,
which should be less than 45°C.
Confirm that the Analyzer is not
exposed to direct sun light.
If the problem is not related to
above, contact the distributor or
the manufacturer.
Check the filters in the fan and
vent.
Check the operation of the fan.
(Note that at temperatures below
25°C, BioTector automatically
switches the fan off to stabilize system
temperature using its own internal
heat.)
Check ambient temperature,
which should be less than 45°C.
Confirm that the Analyzer is not
exposed to direct sun light.
If the problem is not related to
above, contact the distributor or
the manufacturer.
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