Instruction Book
108
9828 0934 73
7.1.2 Faults and remedies (controller)
Condition
Fault
Remedy
Drain alarm
No pressure in the air net
Error disappears when the pressure in
the air net is restored
Drain was not able to drain all the
water
Push drain button manually. When
this occurs frequently the drain should
be replaced
Drain was not able to drain all the
water
Clean the drain internally
(tank/membrane/piston/spring)
No voltage supply to the drain
Check and correct supply to the drain
High pressure switch has shut
down the dryer
Condensing pressure too high
Push the small button of the high-
pressure switch
Clean the condenser
Improve ventilation of the cooling air
See
condition “condenser pressure
too high or too low on air-cooled
dryers”
Refrigerant compressor discharge
temperature too high
Too high load
Reduce air flow
Shortage of refrigerant
Have circuit checked for leaks and
recharged
7.1.3 Faults and remedies (converter). Only for VSD models.
Fault
Description
Cause
What to do
A2B1
Overcurrent
Output current has exceeded
internal fault limit. In addition to an
actual overcurrent situation, this
warning may also be caused by an
earth fault or supply phase loss.
Check motor load.
Check motor and motor cable. Check for
an earth fault in motor or motor cables by
measuring the insulation resistances of
motor and motor cable.
Measure the insulation resistance between
the phase conductors and between each
phase conductor and the Protective Earth
conductor. Use a measuring voltage of
1000 V DC. The insulation resistance of a
motor must exceed 100 M
Ω. Check motor
resistance
Check if refrigerant compressor selected is
correct for the dryer (from the main screen
press two times "OK" button).
