No power GFCI and/or breaker tripped
Transient voltage surge suppressor
(TVSS) damaged
Power supply damaged
Reset GFCI and/or breaker
Replace TVSS
Replace power supply and use a TVSS
GFCI or breaker
repeatedly trips
Connection between lamp and lamp plug
is wet
Short-circuit in the electrical assembly
Clean and dry lamp pins and lamp plug,
check unit for leaks or condensation
Replace power supply
Leak at inlet or
outlet
Threaded pipe fittings are leaking Clean threads, reseal with Teflon tape
and retighten
Leak detected
from area of UV
chamber
Condensation of moist air on cold
chamber (slow accumulation)
O-ring damaged, deteriorated or
incorrectly installed
Lamp/sleeve assembly not properly
installed (too tight or not tight enough)
Control humidity or relocate unit
Inspect and replace if deteriorated
Tighten assembly hand-tight
Leak detected
at sensor (if so
equipped)
UV sensor o-rings are damaged,
deteriorated, or incorrectly installed
Inspect and replace o-rings if
deteriorated
Alarm
See Control Panel section See Control Panel section
System is operating
but water tests
reveal bacterial
contamination
Equipment downstream of UV system
is acting as a breeding ground for
pathogens
Pathogens are residing in the distribution
lines post-UV
Recontamination from pipe dead-ends
Ensure UV is the last piece of treatment
equipment
Ensure all distribution lines have
been disinfected with chlorine - see
Disinfecting the Water Lines section
Remove any pipe dead-ends and flush
with chlorine - see Disinfecting the
Water Lines section
Lamp timer does
not read anything
Unit is unplugged
No power at AC power outlet
Power cord is damaged
Power surge caused damage to electrical
assembly
Plug unit into AC power outlet
Replace fuse or reset breaker
Replace power cord
Replace power supply and use a surge
protector
The table below is a list of possible causes and solutions. Before replacing parts, please contact Trojan Technical
Assistance for any new troubleshooting techniques. 1-800-265-5774
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