Lennox LGT Series Unit Information page 48

Ultraviolet (UVC) Radiation hazard.
Any exposure will cause significant eye damage and may cause skin damage.
DO NOT look into UVC light source.
Access panels must be in place during appliance operation.
UVC LAMP NOT
OPERATING
YES
DONE
LAMP LEDS NOT LIT
DETAIL A
UVC LIGHT TROUBLESHOOTING - POWER
POWER LED
NO
LIT?
YES
CHECK
LAMP LEDS
NO
LAMP LEDS
LIT?
UVC LIGHT TROUBLESHOOTING - LAMP
FIRST TURN THE POWER OFF.
BE SURE THAT THE 4-PIN
CONNECTORS FOR ALL THE
LAMPS ARE PROPERLY
CALL LENNOX
TECH SUPPORT
1-800-453-6669
NO
LAMPS
BLACK ON
ENDS?
DONE
YES
NO
YES
LAMP LEDS
LIT?
CHECK FOR
CONTINUITY
NOTE - CHECK FOR
CONTINUITY ON THE SETS OF
PINS CLOSEST TOGETHER
CHECK FOR
CONTINUITY
DANGER
USE MULTIMETER TO
TEST 110-230V AT
BALLAST INPUT LEADS
YES
GO TO LAMP LED
TROUBLESHOOTING
FIGURE 39
.
ENGAGED
TWO PAIR, PIN TO
PIN ON EACH PAIR
(SEE DETAIL A)
CONTINUITY
PRESENT?
YES
NO
REPLACE LAMPS;
TURN POWER ON
DETAIL B
FIGURE 40
Page 48
CORRECT
FIRST TURN THE POWER OFF;
VOLTAGE
CHECK THE WIRING
NO
PRESENT?
TURN POWER BACK ON
YES
CHECK
POWER
LEDS
POWER LED
LIT NOW?
NO
REPLACE BALLAST
TURN POWER ON;
CHECK LAMP LEDS
LAMP LEDS
YES
LIT?
NO
BANDS
AROUND LAMP
YES
INTACT?
NO
BANDS