Instructions / Assembly

Troubleshooting
23
6.1 Low UV Alarms (+ models only) Certified and Non-certified
*
In some cases, short-term flows of low ultraviolet transmittance (UVT) water can be created following and during the regeneration cycle of a water softener,
resulting in a sensor alarm. Flushing the UV system alleviates this condition until the softener goes through another regeneration cycle. In the longer term,
the softener's settings must be modified. To flush the UV system, disinfect the water lines. Refer to Section 3.2.
**
Refer to Section 5.2.
***
Contact VIQUA or your water treatment dealer for a test of the UVT of the water.
****
For 50%UVT systems if the water UVT is >85%, UV sensor failure alarm will occur. Reducing water UVT will clear this alarm.
Low
U
V Al
a
rm
Clean sleeve & sensor
**
A
ud
i
bl
e
ala
rm
P
roblem i
s
correcte
d
N
o
a
u
d
i
bl
e
al
arm
Check UVT
***
U
VT below
recommende
d
l
eve
l
Increase UVT using
pretreatment
Flush system
*
Aud
i
b
l
e
a
l
a
rm
P
roblem i
s
c
o
rrecte
d
N
o
a
udible
a
larm
UVT above 75%
If answer is no,
replace lamp
Ensure lamp is less than
1 year old
If answer is yes,
replace sensor
or
UVT between
50%-85%****