Labconco 3970202 User Manual - page 49
44
Chapter 8: Troubleshooting
PROBLEM
CAUSE
CORRECTIVE ACTION
Blower won’t
operate.
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.
Poor internal Class
5 air conditions.
Enclosure sash not
closed.
Close sash.
HEPA
filter
clogged.
Replace HEPA filter or increase speed.
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.
UV light timer does
not work
No power.
No lights.
No display
Power cable to UV light timer circuit
board is disconnected. Verify
connection. Replace circuit board for
UV light timer if it malfunctions.
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. Verify that all airflow
monitor interface cables are connected.
Check fuses on enclosure.
No audible alarm.
Alarm has been temporarily silenced
using “SILENCE ALARM.”