Owner's manual

Page 183 of 197
Relay Contact #2……the “airflow error” contact
This set of contacts (dry contacts pins 1 & 2 of J4 on the electrical enclosure, and the
ORANGE wires on Labconco harness #38468-00) will indicate when the BSC’s has an
airflow error, as described by the conditions below:
Type of Logic
unit
Alarm Condition LCD display
message
Airflow Error
dry contacts
Comments
All Labconco
Logic Cabinets
Sash out of
position
SASH TOO HIGH No Response
Motor RPM has
shifted abruptly
AIRFLOW ALERT Contacts shorted
HEPA Filter
approaching end
of life—20%
CHECK FILTER No response
HEPA Filter
approaching end
of life-10%
CHECK FILTER
SOON
Contacts shorted
HEPA Filter end
of life- 0%
REPLACE
FILTERS
Contacts shorted
**Note all
specialty Logic
BSC’s below will
have all the
alarm conditions
listed above, plus
specific alarms
listed below”
A2 BSC with
canopy sensor**
( see above)
Canopy Airflow
incorrect
CANOPY ERROR Contacts shorted
A2 BSC with
airflow sensor**(
see above)
Downflow Airflow
incorrect
DOWNFLOW
ERROR
Contacts shorted
Airflow sensor
not working
AIRFLOW
SENSOR ERROR
Contacts shorted
B2 BSC**( see
above)
Exhaust airflow
not correct
EXHAUST ERROR Contacts shorted
Airflow sensor
not working
AIRFLOW
SENSOR ERROR
Contacts shorted