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Chapter 8: Troubleshooting
PROBLEM CAUSE CORRECTIVE ACTION
Blower won’t
operate.
Unit not plugged
into outlet.
Plug the enclosure into appropriate
electrical service.
Circuit breaker(s)
or Ground Fault
Interrupter.
Reset circuit breaker.
Blower wiring is
disconnected.
Inspect blower wiring.
Blower switch is
defective.
Replace switch.
Motorized impeller
or blower is
defective.
Replace motorized impeller or blower.
See Chapter 6.
Low face velocity
or poor
containment of
contaminants.
Enclosure sash not
closed.
Close sash to the lowest position.
HEPA filter
clogged.
Replace HEPA filter or increase speed.
Carbon filter loaded
with chemicals.
Replace carbon filter.
Blower and lights
won’t operate.
Unit not plugged
into outlet.
Plug enclosure into appropriate
electrical service.
Circuit breaker(s)
tripped.
Reset or replace circuit breaker.
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.