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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 169/197
Fault description
Possible cause
Required measures
Chamber with O
2
control:
Excess O
2
concentration.
Having reached the setpoint,
O
2
exceeds the setpoint by
more than the set tolerance
range value (more than 10
min.) (O
2
control option)
Alarm message
“O
2
range”
Temporary disturbance of the
O
2
control.
Acknowledge the alarm on the
controller. Turn off the chamber. Open
the chamber doors for approx. 5
minutes. Observe the general
information for safe handling of oxygen
(chap.
1.8).. Prevent oxygen
enrichment in the ambiance of the
chamber. Turn on the chamber again.
Upon renewed alarm, contact BINDER
service.
O
2
sensor defective.
Acknowledge the alarm on the
controller. Contact BINDER Service.
Recovery time (up to 5 vol.-%
CO
2
) after doors were open for
2 minutes is < 2 minutes
CO
2
sensor system defective. Contact BINDER Service.
Too low CO
2
concentration.
Having reached the setpoint,
CO
2
falls below the setpoint by
more than the set tolerance
range value (more than 10
min.) or CO
2
doesn’t reach the
tolerance range within 3 hours
from turning on the chamber or
closing the door.
Alarm message “CO
2
range”
Temporary disturbance of the
CO
2
control.
Acknowledge the alarm on the
controller. Turn off the chamber. After
approx. 5 minutes turn on the chamber
again. Upon renewed alarm, contact
BINDER service.
CO
2
sensor defective.
Acknowledge the alarm on the
controller. Contact BINDER Service.
To replace the sensor proceed as
described in chap. 22.4.
Chamber with O
2
control:
Too low O
2
concentration.
Having reached the setpoint,
O
2
falls below the setpoint by
more than the set tolerance
range value (more than 10
min.) or O
2
doesn’t reach the
tolerance range within 3 hours
from turning on the chamber or
closing the door.
Alarm message “O
2
range”.
Temporary disturbance of the
O
2
control.
Acknowledge the alarm on the
controller. Turn off the chamber. After
approx. 5 minutes turn on the chamber
again. Upon renewed alarm, contact
BINDER service.
O
2
sensor defective.
Acknowledge the alarm on the
controller. Contact BINDER Service.
Too low gas concentration.
The concentration of CO
2
or
O
2
(chamber with O
2
control)
does not reach the adjusted
set value.
Door gaskets defective.
Replace door gaskets
Doors not closed properly.
Close door properly.
Connected gas cylinder is
empty or not opened.
Open or replace gas cylinder.
Gas cylinder is not connected
correctly.
Correctly connect the gas cylinder.
Gas hose is dirty or
obstructed.
Check the tube system for dirt
accumulation or obstruction, clean or
replace it.
Recovery time (up to 5 vol.-%
CO
2
) after doors were open for
2 minutes is > 10 minutes.
Obstructed gas supply.
Check gas supply (cylinder,
connections, hose system).
Insufficient CO
2
input
pressure
Unusually high gas
consumption.
Door gaskets defective.
Replace door gaskets
Gas sensor not adjusted.
Calibrate the sensor.
Gas sensor defective.
Contact BINDER Service
Gas fine filter not connected
correctly.
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