Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 117)

Warning/Alarm Description Cause Remedy
38 — Internal fault When an internal fault occurs, a
code number defined in the table
below is displayed.
Cycle power to the frequency
converter.
Check that the option is properly
installed.
Check for loose or missing wiring.
It may be necessary to contact your
Xylem supplier or service
department. Note the code
number for further
troubleshooting directions.
39 — Heatsink sensor No feedback from the heatsink
temperature sensor.
The signal from the IGBT Thermal
sensor is not available on the
power card. The problem could be
on the power card, on the gate
drive card, or the ribbon cable
between the power card and gate
drive card.
40 — Overload of digital output
terminal 27
Check the load connected to
terminal 27 or remove short-circuit
connection.
Check [5–00] Digital I/O Mode and
5–01 Terminal 27 Mode.
41 — Overload of digital output
terminal 29
Check the load connected to
terminal 29 or remove short-circuit
connection.
Check [5–00] Digital I/O Mode and
[5–02] Terminal 29 Mode.
42 — Overload of digital output on
X30/6 or overload of digital output
on X30/7
For X30/6, check the load
connected to X30/6 or remove
short-circuit connection. Check 5–
32 Term X30/6 Digi Out (General
Purpose I/O Option Card).
For X30/7, check the load
connected to X30/7 or remove
short-circuit connection. Check 5–
33 Term X30/7 Digi Out (General
Purpose I/O Option Card).
45 — Ground fault 2 Ground (earth) fault on startup. Check for proper grounding
(earthing) and loose connections.
Check for proper wire size.
Check motor cables for short-
circuits or leakage currents.
46 — Power card supply The supply on the power card is
out of range.
There are three power supplies
generated by the switch mode
power supply (SMPS) on the
power card: 24 V, 5 V, +/- 18 V.
When powered with 24 VDC with
the 24VDC Backup Option Card
option, only the 24 V and 5 V
supplies are monitored. When
powered with three-phase mains
voltage, all three supplied are
monitored.
Check for a defective power cord.
Check for a defective control card.
Check for a defective option card.
If a 24 VDC power supply is used,
verify proper supply power.
47 — 24 V supply low The 24 V DC is measured on the
control card.
The external 24 V DC backup
power supply may be overloaded.
Contact your Xylem supplier.
Warnings and alarms
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 115