A591-40-880 Issue A
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Appendix A2
Table A15 - Hexadecimal to digital conversion
BIT set combinations
Hexadecimal Decimal Combination
F 15 8+4+2+1
E 14 8+4+2
D 13 8+4+1
C128+4
B 11 8+2+1
A108+2
998+1
888
7 7 4+2+1
664+2
554+1
444
332 + 1
222
111
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 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
2SC_MODE_INTERLOCK Internal fault contact Edwards
1 FLASH_DOWNLOAD_ FAULT Internal fault contact Edwards
2 8 POST_FAULT Internal fault contact Edwards
4 OSTEST _FAULT Internal fault contact Edwards
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 dry pump trips after
10 minutes.
4 EMS EMS has been activated.
Check EMS button and EMS plug in the back of pump.
2 DESAT_FAULT Internal fault contact Edwards
1 UNDERT Inverter is too cold. See warning register to determine
source of problem.
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