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Installation and operation instructions
9.2. FAQ
Symptom(s)
Poor degree of drying
Purge air outlet
continuously open
("failsafe")
Purge air outlet constantly
closed (measuring gas flow
only)
34
Possible causes
Temporary overload
Incorrectly dimensioned unit
Aerosols in compressed air
Purge are flow blocked internally
Sensor failure due to age
Incorrect operating mode selected
Coating on the sensor due to low quality of
the incoming air
Continuous overload
Fail-safe mode active
Incorrect installation direction
Software error
Sensor defective
Power failure (power LED off)
Power supply board defective
Unit overheating
Piston gasket defective
Measuring gas nozzle clogged
Incorrectly dimensioned unit
Sensor defective
Remedy
Improve operating conditions (e.g. increase
operating pressure); avoid sudden load
changes
Use larger dryer
Check filter element (function test) and
replace, if necessary; install additional
prefilter; check condensate drain function
and replace if necessary
Contact manufacturer: if necessary, return
unit for repair
Contact manufacturer: if necessary, return
unit for repair or replace control unit
Change operating mode
Improve compressed air quality at the inlet
of the membrane dryer.
Observe the maintenance intervals of the
filter elements and replace them regularly.
Replace control unit.
Send the device to the manufacturer for
repair.
Improve operating conditions (e.g. increase
operating pressure); avoid sudden load
changes; check dryer dimensions; use larger
unit
Check error signals: the flashing rate and
interval of the red LED indicate the type
of the error/fault; if necessary, contact
manufacturer
Check installation direction of unit
Contact manufacturer: if necessary, return
unit for repair or replace control unit
Contact manufacturer: if necessary, return
unit for repair or replace control unit
Connect unit to power mains
Contact manufacturer: if necessary, return
unit for repair or replace control unit
The unit automatically resumes operation
when the internal temperature has dropped
< 140 °F
Contact manufacturer: if necessary, return
unit for repair or replace control unit
Contact manufacturer: if necessary, return
unit for repair or replace control unit
Use smaller dryer
Contact manufacturer: if necessary, return
unit for repair or replace control unit
DRYPOINT
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