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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
2SC_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
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