Binder CB 170 - Gas Cylinder Pressure too Low

CB (E7) 06/2018 Page 152/174
Fault description
Possible cause
Required measures
Too low temperature.
Having reached the setpoint,
the temperature falls below the
setpoint by more than the set
tolerance range value (more
than 10 min.) or the
temperature doesn’t reach the
tolerance range within 3 hours
from turning on the chamber or
closing the door.
Alarm message
“Temp. range”
Chamber door not properly
closed.
Acknowledge the alarm on the
controller. Completely close chamber
door.
Door gaskets defective.
Acknowledge the alarm on the
controller. Replace door gasket.
Controller defective.
Acknowledge the alarm on the
controller. Check the function of the
temperature controller.
Door gasket defective. Replace door gasket.
Temperature controller not
adjusted.
Calibrate and adjust the temperature
controller.
Chamber doesn’t heat up.
Alarm message
“Safety controller”“
Inner chamber temperature
has reached the safety
controller setpoint. Safety
controller set too low.
Acknowledge the alarm on the
controller. Check temperature setpoint
setting. If appropriate, select suitable
safety controller setpoint (chap. 12.2).
Safety controller defective.
Acknowledge the alarm on the
controller. Contact BINDER service.
Chamber doesn’t heat up.
Pt 100 sensor defective.
Contact BINDER service.
Heating element defective.
Semiconductor relay
defective.
Controller defective.
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.
24.3 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. 6.8, 7.3).
Note: The recovery times of the gas concentrations inside the chamber following door opening, which are
indicated in the technical data (chap. 25.4), 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.