Parker K-MT 1-8 - Page 51

Identify and eliminate faults
K-MT1-8_EN_08—2014 51
Fault
Possible cause
Remedy
Specialised personnel
Service technician
No expansion
Solenoid valve Y3/Y4 cannot be
opened.
Check supply voltage, cable, contacts
and solenoid; replace, if necessary.
 
Solenoid valve Y3/Y4 cannot be opened
properly
(audible humming sound or valve
flapping).
Check supply voltage.
Check spring and solenoid; replace, if
necessary. Check solenoid valve for
contamination; clean or replace, if
necessary.
 
Dryer is continuously
bled
Solenoid valve Y3/Y4 cannot be closed
properly (audible humming sound or
valve flapping).
Check supply voltage.
Check spring and solenoid; replace, if
necessary. Check diaphragm; replace,
if necessary.
 
Dryer is excessively
bled
Solenoid valve Y1/Y2 cannot be closed.
Check solenoid and diaphragm;
replace, if necessary.
 
With dewpoint-sensing control (optional)
Fault code
Description of fault
Possible cause
Remedy
Specialised personnel
Service technician
+20
Upper measuring range
limit exceeded
Drying capacity
exceeded.
See instructions for commissioning.
If the drying agent is wet, replace it.

Error in programme.
Restart programme.

999
Dewpoint sensor
defective
Sensor defective or
irreversibly
contaminated.
Replace sensor.
 
sens
or
–999
Sensor not powered, or
cable or sensor defective
Sensor, sensor cable
or sensor adapter
defective.
Visual inspection; check power
supply (24 V to terminals 4 and 6).
Replace defective component(s).
 
SEr
Display for service
interval. Regular
maintenance tasks must
be carried out.
The display appears
after every 8000
operating hours.
Inform the manufacturer’s service
staff and order the appropriate
service kit. The package includes a
dongle with which you can reset the
operating hours counter after
maintenance has been carried out.
For instructions on how to use the
dongle see the enclosed information
sheet (in the service kit).
 