Air Purifying Sstem Installation Guide
Page 11
IX. TROUBLESHOOTING GUIDE 
1.  If the LED is illuminating a “YELLOW” color and the circuit board alarm beeps every 15 minutes, the lamp should 
be replaced soon. 
2.  If the LED is illuminating a “RED” color and the circuit board alarm beeps every 5 minutes, the lamp should be 
replaced immediately. 
3.  If the lamp does not light up, replace lamp. 
4.  If the lamp still does not light up after replacing the lamp, replace ballast. 
X.  REPLACEMENT PARTS LIST
MODEL 
LAMP 
(Field Controls Part Number) 
CIRCUIT BOARD 
(Field Controls Part Number) 
BALLAST 
(Field Controls Part Number) 
UV-12C 46365401 46436300 46365511 
UV-18C 46365402 46436300 46365512 
UV-28C 46365403 46436300 46365510 
UV-28 46365403 N/A 46365503 
UV-12HP 46365401 N/A 46365511 
UV-18HP 46365402 N/A 46365512 
UV-28HP 46365403 N/A 46365510 
UV-12HPC 46365401 46436300 46365511 
UV-18HPC 46365402 46436300 46365512 
UV-28HPC 46365403 46436300 46365510 
For replacement parts, contact your local heating service company. Any questions, please contact Field Controls at: 
Phone: 252-522-3031  Fax: 252-522-0214  Email: sales@fieldcontrols.com 
XI. FLEX DUCT INSTALLATION
For installations on duct systems with a metallic main duct and flex duct branches, follow the instructions in figure 26 
below. 
Figure 26










