Hach BioTector B7000i - Page 145

Page 145
52_HIGH CO2 IN BASE
CO
2
level in the base reagent, which is
checked during the Zero Calibration or
Zero Check cycles, is higher than the
“BASE CO2 ALARM” level
programmed in Fault Setup menu.
Confirm the base reagent CO
2
filter is serviced and in good
condition, and the container is
sealed.
Check reagent quality.
Replace the base reagent.
53_TEMPERATURE ALARM
Temperature of the BioTector is above
the “TEMPERATURE ALARM” level
programmed in Fault Setup menu.
BioTector fan operates constantly in
backup mode until the warning is
acknowledged.
Check temperature of the
BioTector.
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.)
54_COOLER LOW TEMP
Cooler temperature has been below
2°C for longer than 600 seconds. See
Section 8.3.11 Cooler Program for
details.
Check the operation of the Cooler
by observing flashing LED 3 on
the Signal PCB.
Faulty temperature sensor.
Replace the Cooler.
55_COOLER HIGH TEMP
Cooler temperature has been 5°C
above the setpoint (programmed by
“COOLER” in Cooler Program menu)
and 8°C below the ambient
temperature for longer than 600
seconds. See Section 8.3.11 Cooler
Program for details.
Check the operation of the Cooler
by observing flashing LED 3 on
the Signal PCB.
Faulty temperature sensor or
peltier element.
Current taken by the Cooler peltier
element should be ~1.4 Amp.
For further tests, see information
sheet “T022. BioTector Cooler
Troubleshooting” supplied in the
MMC/SD card, shipped with the
BioTector.
Replace the Cooler.
62_SMPL PUMP STOP ON
Sample Pump stopped with its rotation
sensor ON or the sensor is faulty and it
is always showing ON.
ON state = LED 15 on (Signal PCB).
Run the Sample Pump and check
the rotation.
Change Relay 2 on Relay PCB.
Check pump sensor signal looking
at LED 15 on Signal PCB and
DI04 in Digital Input menu.
For further tests, see information
sheet “TT001. BioTector Sample
Pump Stop On & Off Warning_Quick
Troubleshooting” supplied in the
MMC/SD card, shipped with the
BioTector.
Replace the pump.