ZANDER HDK 50/100, Operating Instructions Manual

Page: 58 / 72

Summary of faults
58 HDK350_EN_01_2005-05-10
Fault Possible cause Remedy
Specialised personnel Service technician
No expansion in
chamber Valve V7/V8 does not open properly see *
Valve V7/V8 does not close properly Dryer is continuously
bled
Valve V1/V2 does not close properly
see *
Dryer is bled excessively Valves V1/V2, V3, V4, V5, V6 do not
close properly
see *
Check supply voltage.
z z
Check whether coil is properly mounted.
z z
Inspect valve for contamination; clean
or replace, if necessary.
z z
*
Valve fails to open or close properly
Check voltage at cables, contacts and
coils; replace, if necessary.
z
With dewpoint-sensing control (optional)
Fault code Description of fault Possible cause Remedy
Specialised personnel Service technician
Drying capacity
exceeded. See instructions for commissioning.
If the drying agent is wet, replace it.
z
+20
Upper measuring range
limit exceeded
Error in programme. Restart programme. z
999
Dewpoint sensor
defective Sensor defective or
irreversibly
contaminated. Replace sensor.
z
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).
z