Donaldson Ultrafilter 0020-60 Manual De Funcionamento página 42

Fault Messages and Troubleshooting
8
US
Fault Messages
Symptom
– alarm "over limit !"
>120%
– dew point not
sufficient
– alarm "regen. air
low"
– eventually dew point
not sufficient
alarm "failure"
alarm messages
"failure" and "over
limit"
no condensate drain
Cause
regeneration air flow not
sufficient
one or both alpha-
sensors defective
nonsensical values set
adsorption sensor
defective
loose condensate hose at
prefilter
– 40 –
air flow exceeds dryer
capacity
Operating conditions (P / T)
differ from paramters fitted
into the dryer
wrong or fouled or blocked
throttle element
Operating conditions (P / T)
differ from paramters fitted
into the dryer
adsorption time,
pressurising time
eventually wrong
commissioning
attention: pressure blow
out may destroy sensors!
Action
decrease air flow or change
dryer to larger one
– adjust dryer
– change throttle element
install throttle element with
correct diameter
– adjust dryer
– change throttle element
– check sensor
– if required, replace sen-sors
and multifunction unit
set adsorption time to 120 s
change multifunction unit
fix condensate hose