Mentor ll User Guide 91
Issue Number: 12 www.controltechniques.com
9 Diagnostic Procedures
Trip codes
If the Drive trips, the index display shows triP, and the data message will
flash. The data display shows a mnemonic to indicate the reason for the
trip.
Thelastfourtripcodesarestoredinparameters10.25 through to 10.28,
and are available for interrogation unaffected by power down/up cycles.
The data stored in these parameters is updated only by the next trip
event.
In the event of any trip, all RO parameter values are frozen and
remain so for interrogation while the cause of the fault is
investigated. To enter parameter adjustment mode from the trip
mode, press any of the five adjustment keys. To re-enter trip mode,
go to Menu 00 and press LEFT key.
If the trip persists, contact your supplier. Attempts to repair the
Drive may invalidate the warranty.
Trip codes in numerical order
Mnem. Code Reason for the trip
AOC 121 Armature overcurrent An instantaneous protection trip has been activated due to excess current in the armature circuit
AOP 126 Armature open circuit Drive has detected that the firing angle has advanced but no current feedback has been detected
cL 104 Current (control) loop open circuit If the input reference is either 4-20mA or 20-4mA, this trip indicates that input current is <3.0mA
EEF 132 EEprom failure Indicates that an error has been detected in the parameter set read from the EEprom at power-up
EPS 103 External power supply Overcurrent trip at the 24V supply output terminal (TB4-33) has operated, indicating an overload
in the external circuit connected to this supply. Maximum current available is 200mA
Et 102 External trip Parameter 10.34 = 1. The external trip set up by the user has operated
FbL 119 Feedback loss No signal from tachogenerator (tachometer) or encoder (pulse tachometer)
Fbr 109 Feedback reversal The polarity of the feedback tacho or encoder polarity is incorrect. This trip does not operate on
1Q Drives
FdL 118 Field loss No current in field supply circuit
FdO 108 Field on The user has initiated self-tuning (05.09) and field current has been detected
FOC 106 Field overcurrent Excess current detected in field current feedback. If current feedback is present and firing angle
is phased back, then trip
hF 100 Hardware fault A hardware fault has been detected during the self-diagnosis routine performed after power-up.
Users are recommended to consult the supplier of the Drive
It 122 I x t trip The integrating overload protection has reached trip level
Oh 107 Overheat Thyristor (SCR) heatsink overtemperature. Only on Drives equipped with heatsink thermistors
(thermal switches)
Pc1 124 Processor 1 watchdog Indicates a fault in the MDA1 hardware has been detected by malfunctioning of Processor 1
software
Pc2 131 Processor 2 watchdog Indicates a Processor 2 malfunction, or a software bug (MD29 option)
PhS 101 Phase sequence Connections to E1 and E3 are not the same phases as are connected to L1 and L3. Investigate
and correct
PS 125 Power supply One or more of the internal power supplies is out of tolerance
ScL 105 Serial communications link
(interface) loss
(Only in serial comms mode 3) No input data detected
SL 120 Supply loss. One or more of the power (input) supply phases is open-circuit
th 123 Thermistor (thermal switch) Motor protection thermistor (thermal switch) has initiated a trip indicating windings overheating.
Trip threshold 3kΩ±5%. Reset 1.8kΩ
A29 40 - 69 Indicates an MD29 fault Refer to the MD29 Users Guide
NOTE
NOTE
A29 40 - 69 MD29 fault
hF 100 Hardware fault
PhS 101 Phase sequence
Et 102 External trip
EPS 103 External power supply
cL 104
Current (control) loop open circuit
ScL 105
Serial communications link (interface) loss
FOC 106 Field overcurrent
Oh 107 Overheat
FdO 108 Field on
Fbr 109 Feedback reversal
FdL 118 Field loss
FbL 119 Feedback loss
SL 120 Supply loss
AOC 121 Armature overcurrent
It 122 I x t trip
th 123 Thermistor (thermal switch)
Pc1 124 Processor 1 watchdog
PS 125 Power supply
AOP 126 Armature open circuit
Pc2 131 Processor 2 watchdog
EEF 132 EEprom failure.
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