9-2 Diagnostics
1560D-UM051D-EN-P – February 2005
Fault Buffer The SMC Dialog Plus™ controller stores the five most recent faults in
memory. Display the fault buffer by selecting the Faults group and
scrolling through the fault buffer parameters. The information is stored
as fault codes. To determine what faults have occurred, use the fault
code cross-reference below.
Fault Codes
Table 9.A provides a complete cross-reference of the available fault codes
and corresponding fault descriptions.
Table 9.A
Fault Code Cross-Reference
Fault Description Fault Number Fault Type Parameter Number
Power loss A fault 1 Line 1 / 2 / 3
Power loss B fault 2 Line 1 / 2 / 3
Power loss C fault 3 Line 1 / 2 / 3
Undervoltage fault 4 Line 51 52
Overvoltage fault 5 Line 54 / 55
Stall 6 Line 37
Overload fault 7 Current 36 / 70 / 72 / 84 / 88
Controller temp fault 8 Hardware –
Underload fault 9 Current 60 / 61
Imbalance fault 10 Current 58
Line A fault 11 Line 1 / 2 / 3
Line B fault 12 Line 1 / 2 / 3
Line C fault 13 Line 1 / 2 / 3
Line fault 15 Line 1 / 2 / 3
Phase reversal fault 16 Line 62
Jam fault 19 Current 56 / 57
Cur. Feedback loss 20 [ Current 70
Comm fault 21 Hardware –
Start A firing fault 23 Current 70
Start B firing fault 24 Current 70
Start C firing fault 25 Current 70
Line A fault 26 Current 70
Line B fault 27 Current 70
Line C fault 28 Current 70
Line fault 29 Z Current 70
Power loss A fault 30 [ Current 70
Power loss B fault 31 [ Current 70
Power loss C fault 32 [ Current 70
Excess starts/Hr 64 – 63
System fault 128 – 140 Unexpected condition –
COMM fault – SCANport disconnected –
MPU COMM fault – Internal COMM fault –
These faults occur before gating is applied (pre-start).
These faults may be either before gating or during start or stop manoeuvres.
These faults can occur during starting or running and indicate a line fault. The manner in
which they occurred does not give a phase indication.
[ These faults will occur when the measured current is less than 1/8 of the motor FLC
(1/16 of FLC for FRN 1.11L, 1A11L, 1B09L, 1C05L, 1D06L, 1F05L).
Note: Refer to Table 10.A for fault display explanation.
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