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Fault Messages and Troubleshooting
Fault Messages
8
Ultrapac 2000 midi sp / 24.09.2008
US
Symptom Cause Action
– alarm “over limit !“
>120%
– dew point not
sufficient
air flow exceeds dryer
capacity
decrease air flow or change
dryer to larger one
Operating conditions (P / T)
differ from paramters fitted
into the dryer
– adjust dryer
– change throttle element
– alarm “regen. air
low“
– eventually dew point
not sufficient
regeneration air flow not
sufficient
wrong or fouled or blocked
throttle element
install throttle element with
correct diameter
Operating conditions (P / T)
differ from paramters fitted
into the dryer
– adjust dryer
– change throttle element
alarm “failure“ one or both alpha-
sensors defective
– check sensor
– if required, replace sen-sors
and multifunction unit
nonsensical values set adsorption time,
pressurising time
set adsorption time to 120 s
alarm messages
“failure“ and “over
limit“
adsorption sensor
defective
eventually wrong
commissioning
attention: pressure blow
out may destroy sensors!
change multifunction unit
no condensate drain loose condensate hose at
prefilter
fix condensate hose
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