APPENDIX B : A--SERIES AIR DRIVEN AIRDRYER
B--14 20951 Issue 1 Apr 98
FAULT REMEDYPOSSIBLE CAUSE
Airflow too high Regulator set above
2bar
Set regulator to 2bar
and lock adjustment
knob in position
Needle valve not set
correctly
Set to give an airflow
of 2.2L/min
Constant pressure
fault
Air pressure switch
faulty
Check LED 1 (P) is
illuminated
indicating a pressure
fault
Check wiring and
operation of switch
Check PCB
Airdryer air output not
connected to printer
Connect air output to
printer and ensure
there is air flow at the
printhead
There is no
airflow from the
airdryer and the
unit has not gone
into fault mode
Air pressure switch
faulty
Check LED 1 (P) is
illuminated
indicating a pressure
fault
Check the air output
is not blocked
Check wiring to and
operation of switch
Check PCB
Beacon
illuminated and
sounder operating
Air pressure failure or
humidity greater than
40%RH
Check input air
supply,
check filters
No power to
printer
Fuse blown Replace fuse -- ensure
no other fault exists
Both airdryer and
printer not
powering up
Airdryer mains fault Check mains fuse,
check for loose mains
connections in
airdryer
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