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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 167/197
Fault description
Possible cause
Required measures
Very long heating-up times. Chamber fully loaded.
Load the chamber less or consider
longer heating-up times.
The displayed actual
temperature value deviates
largely compared with a
reference method..
Temperature control not
adjusted.
Calibrate and adjust the temperature
control.
Temperature sensor
defective.
Transfer the cultures to another
incubator and contact BINDER Service.
22.6.3 Gas cylinder pressure too low
The alarm messages indicate that the pressure in the supply lines of CO
2
, O
2
(chamber with O
2
control)
and N
2
(chamber with O
2
control) has dropped below 0.3 bar. If no gas cylinder changer is installed, the
gas cylinder must be replaced. Observe the safety instructions and the maximum outlet pressure (chap.
4.4).
Prerequisite for pressure alarm messages for O
2
and N
2
(chamber with O
2
control) is that the
O
2
/ N
2
control with the respective alarms are activated (chap. 6.7, 7.3).
Note: The recovery times of the gas concentrations inside the chamber following door opening, which are
indicated in the technical data (chap. 24.4), refer to a connection pressure of 2.0 bar / 29 psi. Decreasing
supply pressure down to the shift point (alarm point) of 0.3 bar / 4.4 psi results in longer recovery times.
Check the pressure displays of your gas supply. If very short recovery times are required or the door is
opened frequently, replace the gas cylinders promptly when the pressure decreases below 2.0 bar / 29 psi.
Fault description
Possible cause
Required measures
Low CO
2
outlet pressure
(< 0.3 bar)
Alarm message
“CO2 pressure”
CO
2
cylinder is not connected
correctly.
Acknowledge the alarm on the
controller. Correctly connect the gas
cylinder.
Connected gas cylinder is
closed.
Acknowledge the alarm on the
controller. Open the gas cylinder.
Connected gas cylinder is
empty.
Acknowledge the alarm on the
controller. Replace the gas cylinder.
Observe the safety instructions and the
maximum outlet pressure (chap. 4.4).
Gas hose is dirty or
obstructed.
Acknowledge the alarm on the
controller. Turn off the gas supply and
remove the gas connections. Check the
tube system for dirt accumulation or
obstruction, clean or replace it.
Controller malfunction.
Acknowledge the alarm on the
controller. If necessary, contact
BINDER Service.
Pressure sensor system
defective.
Acknowledge the alarm on the
controller. Contact BINDER Service.
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