DISPLAY FAULT MODES
LED display reads
“A3”
• lamp life expired - countdown is at “0” days
• press reset button for a deferred alarm, replace UV lamps
LED display is
blank
• controller is in lamp failure mode
• power system down, allowing it to reset itself; apply power in order
to confirm that the controller is able to power lamp
• check to see if there is sufficient power to the UV system
• replace lamps
Low UV level
displayed on
screen
• test water supply to see if water quality meets recommended
parameter limits
• clean quartz sleeves and sensor eye
LED flashing “A2”
and then back to
UV level
• low UV alarm deferral has been activated
• UV level has dropped below 50% and the audible alarm has been
muted by pressing the reset switch and holding it for 5 seconds
• this audible alarm deferral will only last 12 hours
16
NOTE:
Not performance tested or certified by NSF.
0
50
100
150
200
250
300
350
400
0
5
10
15
20
25
30
35
40
45
FLOW RATE (U.S. gpm)
UV DOSE (FLUENCE) (mJ/cm
2
)
SHF-140 & SHFM-140
SHF-180 & SHFM-180
Note: dosages based on 95% UVT at end of lamp life (0.85 EOLL)
D"
1966 US
Public Health
Manufacturers
Standard
NSF/EPA
Standard
Hi-Flo Series Dose Chart:
E. Coli eradicated
at 6.6mJ/cm
2
Cryptosporidium & Giardia
eradicated at <10mJ/cm
2
