Bürkert 0911, Operating Instructions Manual, Page: 26 / 84

24 - 0911
english
ACKNOWEDGING ERRORS VIA THE KEYBOARD
Press any button.
The Alarm message remains on the display as long as the alarm conditions
are present. The device then switches to normal operation.
AUTOMATIC ACKNOWLEDGEMENT OF THE ERROR
• Message PFo and PFc - Room sensor error
After approx. 30 seconds or once the error has been cleared, the
message will be acknowledged automatically. Check the connections
before any replacement of the sensor.
• Messages
HA/LA - High/Low temperature alarm
The messages disappear automatically as soon as the normal temperature
range is reached again or if defrosting starts.
• External alarms EAL and BAL are acknowledged after deactivation of the
digital input.
STATUS OF THE ALARM RELAY
Device status AS = CL AS = OP
Device without power 5 - 6 closed 5 - 6 closed
Normal operation 5 - 6 closed 5 - 6 open
Alarm situation during
operation
5 - 6 open 5 - 6 closed
8 REPAIR WORK
8.1 Faults
ERROR MESSAGES
Message Cause Effect
PFo
Sensor defective or not
connected Alarm relay ON; control circuit
according to
So1
PFc Sensor short-circuit
Alarm relay ON; control circuit
according to
HA High temperature alarm
Alarm relay ON; outputs remain
unchanged
LA Low temperature alarm
Alarm relay ON; outputs remain
unchanged
EAL Digital input alarm Outputs remain unchanged
BAL