Message text
Cause
Solution
Low UV intensity after
wiper cycle
n
UV intensity is still low after
wiping
n
UV lamp has aged and UVC
power too low
n
Low transmission of the water
n
Stubborn dirt on the radiator
protection tube and insuffi‐
ciently removed by wiping cycle
n
Dirt on UV sensor, faulty UV
sensor
n
Replace the UV lamp
n
Check the transmission of the water
and improve pre-treatment, if neces‐
sary, or adjust system settings to
water quality
n
Manually clean the lamp protection
tube
n
Clean the UV sensor, replace UV
sensor
UV intensity below
warning threshold!
n
UV intensity below the warning
threshold
n
UV lamp has aged and UVC
power too low
n
Poor transmission of the water
n
Dirt on the lamp protection tube
n
Dirt on UV sensor, faulty UV
sensor
n
Replace the UV lamp
n
Check the transmission of the water
and improve pre-treatment, if neces‐
sary, or adjust system settings to
water quality
n
Manually clean the lamp protection
tube
n
Clean the UV sensor, replace UV
sensor
Unit must be OFF to man‐
ually control wiper!
Manual movement of the wiper is
only permitted when the UV
system is switched off
Switch off the UV system
Warning messages
Troubleshooting
98