Chapter 8: Troubleshooting
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51
PROBLEM
CAUSE
CORRECTIVE ACTION
Lights do not work
.
Lamp not installed
properly.
Inspect lamp installation.
Lamp wiring disconnected.
Inspect lamp wiring.
Defective lamp.
Replace lamp.
Light switch is defective.
Replace light switch.
Defective electronic
ballast.
Replace ballast.
Airflow monitor
malfunction.
No power.
No lights.
No display.
Power cable to circuit board is disconnected and
needs to be connected. Sensor cable needs to be
connected. Power supply is not plugged into
proper voltage; plug in power supply. Verify that
all airflow monitor interface cables are
connected. Check fuses on enclosure.
No audible alarm.
Alarm has been temporarily silenced using
“SILENCE ALARM” or “enter” buttons.
Wrong alarm set point.
Airflow monitor was not properly adjusted.
Repeat calibration steps outlined in this manual in
Chapter 6 or in the supplied Digital 1000 Monitor
Manual.
Constant audible alarm.
Check airflow and calibration of airflow monitor.
See Chapter 6.
Continuous alarm.
Check the face velocity of the enclosure as the
airflow of the system may have changed. If
incorrect, adjust the speed control to increase face
velocity. The ULPA filter may have become
loaded. If face velocity is correct, calibrate the
airflow monitor outlined in this manual in
Chapter 6.
Monitor alarms; air way to
airflow monitor sensor is
blocked by insects, dust or
debris.
Lightly clean the airway with clean air. Be
careful not to touch sensitive electrical
components.
Audible disable will not
stay operational.
An alarm condition must be continuously present
before the audible alarm can be silenced. If flow
conditions fluctuate near the alarm set point, the
airflow monitor will automatically reset it.
Action should be taken to bring the enclosure
airflow into proper operating parameters or adjust
the alarm set point lower.
