Labconco 3980200 User Manual - page 69

64 

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.  Verify that all airflow 

monitor interface cables are connected.  

Check fuses on enclosure. 

No audible alarm. 

Alarm has been temporarily silenced 

using “SILENCE ALARM”.