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Page 49
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Appendix A2
A541-11-880 Issue A
A2.3
Inverter warnings and alarms
The inverter used to drive the dry pump can also generate warnings and alarms if problems are encountered. Inverter
warning and alarm codes are displayed by the PDT if fitted.
The alarm and warning codes are each reported as a 16-bit word encoded as 4 hexadecimal numbers. The codes are
displayed as follows:
A1234 W5678
Where:
A signifies Alarm and
W signifies Warning
Digits 1 – 8 are reported as hexadecimal digits from 0 to F.
To determine the cause of a warning or alarm you must first decode each hexadecimal number. 0 indicates that there
is no alert for that bit. Normally you will only see codes of 1, 2, 4 or 8 for each bit but if two or more events occur
in the same bit then these will be added together.
For example:
5 = 1 + 4 so if code 5 is displayed it means that alerts 1 AND 4 are active
B = 1 + 2 + 8 so if code B is displayed it means that alerts 1, 2 AND 8 are active.
To decode inverter warning and alarm codes, refer to
to convert the hexadecimal digits into alert
combinations and then refer to
and
).
Table A14 - Alarms
Warning Message
on PDT
'Action' Message on
PDT
Possible Cause
Action
Alarm 1.01
Stop Activated
-
- The emergency stop has been
activated.
- There is a fault with the EMS
circuit or the EMS link plug has not
been fitted or has come
disconnected.
If the EMS button has been used
on the pump, refer to
to re-set it. Otherwise check and
reset the EMS circuit and re-start
the pump.
Note:
The alarm message will
remain on the display
until you restart the
pumping system.
Alarm 1.01
Sys Config Fault
-
The pump system type has not
been set properly.
Contact Edwards for a service
engineer to configure the pump
system type correctly or replace
the pump controller electronics.
Alarm 184.10
Dry Pump Stopped
See manual
The dry pump speed is very low.
The rotor might be locked.
Cycle the power to the pump and
attempt to re-start. If this fails,
contact Edwards.
Alarm 186.01
DP Inverter Trip
Code Axxxx Wyyyy
aaaaaaaaaaaaaaaa
Dry Pump Inverter has raised an
alarm and stopped the system.
for more
information.
Alarm 186.01
DP Not Running
See manual
Dry Pump Inverter will not start up
when requested.
Check inverter fault history.
Alarm 186.13
No DP Inv Comms
See manual
The pump controller cannot
communicate with the dry pump
inverter during startup checks
Check the wiring between the
pump controller and the dry pump
inverter
