Chapter 8: Troubleshooting
| PROBLEM |
| CAUSE | CORRECTIVE ACTION |
| Blower won’t |
| Unit not plugged | Plug the enclosure into appropriate |
| operate. |
| into outlet. | electrical service. |
|
|
| Circuit breaker(s) | Reset circuit breaker. |
|
|
| or Ground Fault |
|
|
|
| Interrupter. |
|
|
|
| Blower wiring is | Inspect blower wiring. |
|
|
| disconnected. |
|
|
|
| Blower switch is | Replace switch. |
|
|
| defective. |
|
|
|
| Motorized impeller | Replace motorized impeller or blower. |
|
|
| or blower is | See Chapter 6. |
|
|
| defective. |
|
| Low face velocity |
| Enclosure sash not | Close sash to the lowest position. |
| or poor |
| closed. |
|
| containment of |
|
|
|
| contaminants. |
|
|
|
|
|
| HEPA filter | Replace HEPA filter or increase speed. |
|
|
| clogged. |
|
|
|
| Carbon filter loaded | Replace carbon filter. |
|
|
| with chemicals. |
|
| Blower and lights |
| Unit not plugged | Plug enclosure into appropriate |
| won’t operate. |
| into outlet. | electrical service. |
|
|
| Circuit breaker(s) | Reset or replace circuit breaker. |
| Lights do not work. |
| tripped. |
|
|
| Lamp not installed | Inspect lamp installation. | |
|
|
| properly. |
|
|
|
| Lamp wiring | Inspect lamp wiring. |
|
|
| disconnected. |
|
|
|
| Defective lamp. | Replace lamp. |
|
|
| Light switch is | Replace light switch. |
|
|
| defective. |
|
|
|
| Defective electronic | Replace ballast. |
|
|
| ballast. |
|
| Airflow monitor |
| No power. | Power cable to circuit board is |
| malfunction. |
| No lights. | disconnected and needs to be |
|
|
| No display. | 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. |
70
