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Appendix A2
M561-00-880 Issue C
Table A18 - Inverter alarm codes
INVERTER ALARMS
BIT
SET
Fault Code
Combination
PDT reported fault name
Description
1
8
ACCELERATION_TO
If motor has not accelerated to a minimum speed of 10Hz
within 60 secs then drive will try to restart 3 times before
giving alarm
4
OVERLOAD_TO
Alarm given when dry pump speed is below 7Hz for 3
minutes or 30 minutes for a booster
2
SC_MODE_INTERLOCK
Internal fault contact Edwards
1
FLASH_DOWNLOAD_ FAULT
Internal fault contact Edwards
2
8
SELF_TEST_FAULT
Inverter diagnostic registers also checked, as per
Table A20
, and text output as per that table.
Self test fault can be because of invalid data value read
for address, data rate, un-initialised analogue input
channel.
4
OSTEST _FAULT
Internal fault contact Edwards
2
EEPROM_FAULT
Inverter diagnostic registers also checked, as per
Table A20
, and text output as per that table.
EEPROM Parameter Upload Incomplete or subsequent
EEPROM communication failure.
1
PWM_TRIP
Inverter output switched off, active when drive not
running. Restart pump or cycle power to reset.
3
8
MISSING_PHASE_ TIMEOUT
Indicates a missing input phase - check power connections
to pump and fuses in supply.
Warning should appear first and then pump trips after 10
minutes.
4
EMS
EMS has been activated.
Check EMS button at front and EMS plug in the back of
pump controller.
2
DESAT_FAULT
Internal fault contact Edwards
1
UNDERT
Inverter is too cold. See warning register to determine
source of problem.
4
8
OVERT
Motor/Drive system over temperature - refer to warning
code to determine source. Check cooling.
4
OVERI
Motor overcurrent
2
OVERV
Inverter overvoltage
1
Reserved
Reserved
