Summary of faults
52
HDK-CNG_EN_03_2016
Fault
Possible cause
Remedy
D
ry
e
r
s
tops
dew point
Dewpoint not reached
Check and if necessary adjust settings
Insufficient operating pressure.
Increase operating pressure.
Differential pressure on the upstream
filter is too high.
Check differential pressure on the upstream filter,
if nec. renew filter element.
Gas inlet temperature too high.
Reduce compressed air inlet temperature or pre-
connect a compressed air cooler.
Condensate trap on the upstream filter
does not work.
Check function of the condensate trap, if nec.
clean or renew.
Drying agent is contaminated or too old. Check drying agent for contamination, if nec.
renew drying agent.
Cable defective
Replace cable.
TF1 defective
Replace transmitter
fault dew point
sense
Regeneration gas too low.
Check function of valve V7 / V8 and muffler, if
necessary, replace muffler or filter element.
service interval
Service not carried out
Carry out service and confirm
fault expansion
Y3 / Y4 fails to open
Check valve and replace if necessary
Pressure too low
Nozzle blocked
Check nozzle and replace if necessary
fault pres. Sens.
Cable defective
Replace cable.
Sensor defective
Replace sensor.
TF2/ TF3 defective
Replace transmitter
Exceeded operating pressure
Reduce inlet pressure
fault pressuris.
pressure-up valve falls to open
Check valve and replace if necessary
expansion valve fall to close
Check valve and replace if necessary
