User guide
Chapter 7: Troubleshooting 
Product Service 1-800-522-7658 
47
Original instructions 
PROBLEM  CAUSE  CORRECTIVE ACTION 
Fluorescent light not 
working 
Sash is closed  Open sash – Fluorescent lights will not 
work with the sash closed. 
  Lamp(s) are defective  Replace defective lamp(s) 
  Lamp wiring is 
disconnected 
Inspect lamp wiring. 
 Defective lamp 
ballasts 
Replace lamp ballasts. 
 Keypad disconnected 
or defective 
Run keypad diagnostics and check 
connections. 
Fluorescent light is 
dim or flickering 
Lamp(s) are defective  Replace defective lamp(s) 
Lamp wiring is 
disconnected 
Inspect lamp wiring. 
Defective lamp 
ballast 
Replace lamp ballast. 
UV light not 
working 
Sash is open  Close sash – UV light will not work 
with the sash open. 
  Lamp is defective  Replace defective lamp. 
  Lamp wiring is 
disconnected 
Inspect lamp wiring. 
 Defective lamp 
ballast 
Replace lamp ballast. 
 Keypad disconnected 
or defective 
Run keypad diagnostics and check 
connections. 
UV light is dim or 
flickering 
Lamp is defective or 
is at end of operating 
lifetime. 
Replace defective or worn out lamp. 
Lamp wiring is 
disconnected 
Inspect lamp wiring. 
Defective lamp 
ballast 
Replace lamp ballast. 










