Troubleshooting 7
October 2013 GB 49 /80
Display Possible Cause Remedy
E505:
VSD Stop Pressed
The red Stop button on the fre-
quency converter (VSD) was
pressed while the compressor
was running.
Always switch the compressor off
via the DELCOS XL.
E506:
VSD EM-Stop Input
Compressors with PowerFlex 75x
VSD only:
During the period that the DEL-
COS XL had detected that an
Emergency Stop button had been
pressed, no corresponding feed-
back was received from the VSD.
Check EM-Stop circuit. This fatal
fault cannot be reset. Re-pow-
ering the compressor will run
the Setup Code procedure. See
chapter "Setting up a replace-
ment controller / setup code and
compressor reference number".
E507:
VSD Read Fault
Fault when reading data from the
VSD.
Contact Gardner Denver Service.
E508:
VSD EM-Stop Input
Compressors with PowerFlex 75x
VSD only:
During the period that the VSD
had detected that an Emergency
Stop button had been pressed,
no corresponding feedback was
received from the DELCOS XL.
Check EM-Stop circuit.
This fatal fault cannot be reset.
Re-powering the compressor
will run the Setup Code proce-
dure. See chapter "Setting up a
replacement controller / setup
code and compressor reference
number".
E509:
See VSD display.
Compressors with PowerFlex 75x
VSD only:
An unexpected fault code was
received from the VSD.
Read off the displayed fault code
from the VSD display and contact
Gardner Denver Service.
E510:
Speed below min. Limit
Speed is below permissible mini-
mum rotational speed.
Check the differential pressure of
the fine separator.
Check the oil level.
Check the water content of the
oil.
Chart 7-4: Faults triggered by the frequency converter (VSD) (E500 - E531) (RS)
Warnings triggered from the compressor (A900 - A995)
Display Possible Cause Remedy
A600:
Service due
Hours to next Service below 200
hours.
Service the compressor corre-
sponding to service instructions.
A601:
Discharge Over Pressure
Rated pressure exceeded by 1.0
bar / 14 psi
1)
1 Pressure losses in the system
too high
2 Set line pressures
2)
too high
3 External pressure requirement
too high
4 Intake controller not closing.
5 Pressure sensor B1 or B2 de-
fective (incorrect indication)
•
Check, find cause.
•
Correct.
•
Check remote on-load/off-load
switching points.
•
Check, find cause.
•
Check, renew if necessary.
Chart 7-5: Warnings triggered from the compressor (A600 - A695)