Instruction manual
Hallett 15xs Instruction Manual 
Released on 20-Sept-12 – H800003P  Page 29  UV Pure Technologies Inc. © 2012 
ALARMS & TROUBLESHOOTING MENU (CONT’D)  
Alarms and 
Troubleshooting
Treatment Alarm
Review both UVI 
& UVT values
Low UVT Value
Check Pretreat- 
ment devices
Inspect unit 
for fouling
Confirm Wiper 
motor operation
Confirm purge 
valve operation
Check reflectors
Sensor may  
have drifted
New sensor or 
calibration reqd
Lamps require 
replacement
Install 2 lamps 
& reset counter
Front Panel Ajar
Fully Close 
Front Panel
Wiper not 
turning
Check wiper 
motor operation
Water 
temperature high
Check purge 
valve operation
Check shutoff 
valve operation
Circuit board 
temperature high
Check CB fan 
operation
Check if room 
temp within spec
UV Chamber 
Temperature High 
Check if filter 
dirty, fan fail
Check if room 
temp within spec
Temperature 
Sensor Failure
Check All 
Temp.  Values
Microprocessor 
failure
Unplug unit and 
recheck.
UV Sensor 
Failure
Check connection
Power reset
Power interrup- 
tion occured
Test Shutoff 
valve
Confirm valve 
closes and opens
ALARM
HELPFUL 
TIP
WARNING
WARNING
WARNING
WARNING
ALARM
ALARM
ALARM
WARNING
This column represents all possible 
reasons for the fault.










