A540-55-880 Issue D
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Appendix A2
Table A16 - 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 20 Hz
for DP and 25 Hz for BP 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 SELF_TEST_FAULT Internal fault contact Edwards
2 8 NO_PARAMETER_SET Internal fault contact Edwards
4 Reserved Reserved
2 EEPROM_FAULT Internal fault contact Edwards
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 OVERF Indicates an over speed condition.
Table A17 - Inverter warnings codes
Inverter warnings
BIT
Fault Code
Combination
Name Description
5 8 SELF_TEST_WARNING Internal fault contact Edwards
4 PPREG Indicates pump operating speed is reduced to protect
pump from prolonged roughing.
2 LOWTW Condensation warning, indicates that the inverter (water)
temperature is lower than expected – possible causes
include inverter water valve stuck open.
1 HIGHTW Indicates that the inverter temperature is higher than
expected – possible causes include no or low cooling water
flow, inverter water valve stuck closed or water pipe to
inverter blocked.
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