OPTIONS
27
M4 M5,5 M7,5 M11
Note: With a time or level controlled condensate drain, the float drain
is not fitted.
Check the trouble–shooting list on page 27 when maintenance shows
any irregularities.
TROUBLE SHOOTING
Before starting maintenance or repair on the dryer, the mains switch and the on/off switch must be turned off. Also, the compressed air must be vented
from the system.
Complaint Cause Corrective action
The dryer is switched on, but Mains power is missing Check and remedy when necessary.
does not start.
The on/off switch is defective
The internal thermal protection of the
compressor motor has changed–over
Check for undervoltage. The compressor will restart automatically
after 30 – 60 minutes when it has cooled down.
The pressure dew point is too
high.
The air inlet temperature is too high. Check and remedy. Install a receiver or a pre–cooler when
necessary.
The ambient temperature is too high. Check and remedy. Move the dryer if required or move the cooling
air suction pipe to a cooler location.
The air inlet pressure is too low. Increase the air inlet pressure.
The dryer’s capacity is exceeded. Reduce the air inlet flow. When this is not possible, reduce the air
inlet pressure. Consider purchasing a second or a larger dryer as
a final solution.
The condenser pressure is too The fan or the fan motor is defective. Check and contact the service department.
high or too low.
The ambient temperature is too high. Check and remedy. Move the dryer if required or move the cooling
air suction pipe to a cooler location.
The condenser is dirty on the outside. Clean the condenser as described in the maintenance section on
page 26
The internal thermal protection of the fan motor
has changed–over.
The fan motor will restart automatically when the windings have
cooled down after 30 – 60 minutes.
The pressure drop over the
dryer is too high.
The compressed air system is obstructed. Contact the service department.
The water separator does not
function or continuously
The electronic drain system is plugged. Clean the water separator as described in the maintenance section
on page 26
discharges water and air.
The electronic drain system is defective. Contact the service department.
Note: The dew point will deviate from the nominal value when nominal conditions are exceeded. Ex.: a dew point of 7_C is considered to be normal
when the flow, the compressed air inlet pressure, the air inlet temperature or the ambient temperature are above the nominal value or the pressure is
below the nominal value.
Contact the service department when the problem can not be solved on the basis of this trouble–shooting list.
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