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51
5 BASIC TROUBLESHOOTING
Problem
Possible Cause
Solution
System Inactive
(pump and the
control panel not
operating)
No electrical power
Ensure the power cord is
connected to a live power
source
Main fuse blown.
Replace the main fuse
RO Indicator Light
Blinks
Inlet water exceeds
Add additional pretreatment
RO Membrane damaged
Replace the RO membrane
UP Indicator Light
Blinks
UP cartridges exhausted
Replace AccuDuo H and U
Pack cartridges
Low Pressure Alarm
No inlet water
Check tap water faucet
Prefilter clogged
Replace prefilters in the
Prefiltration pack
Pressure at the tap water
too low
Call service to have an external
booster pump installed by a
professional engineer
No Water
Water supply stopped
Restore water supply
Water tank is empty
Wait until water tank is filled
RO water failure
Wait till RO water passes
quality parameter.
If RO indicator light blinks for a
long period of time, then RO
membrane needs to be
replaced.
Booster Pump not working Contact a ULS agent
Prefilter clogged
Replace prefilters in the
Prefiltration pack.