Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 216)

6–6 Troubleshooting
Publication 1397-5.0 — June, 2001
Fault No. Fault Name Description Action
085 “Main Contactor” The main (FN) contactor did not open following a run or
jog. Possible causes include:
• Disconnected, loosely connected, or damaged FN, FN
AUX, Dynamic Braking or Auxiliary Dynamic Braking
wiring.
• FN, FN AUX, DB or DB AUX contactor malfunction
• Disconnected, loosely connected, or damaged main
contactor or dynamic braking control wiring (MCR or
DBCR)
Check all wiring and connections to
the dynamic brake and dynamic brake
contacts. Repair or replace as
necessary.
086 “Power Failure” The power supply input voltage momentarily went below
tolerance. Possible causes include:
• AC line voltage dip (20% tolerance)
• Disconnected, loosely connected, or damaged J7 ribbon
cable or power supply input wiring
Check J7 ribbon cable and power
supply input wiring, repair or replace
as necessary. If AC line voltage dips
are occuring regularly, an isolation
transformer or line reactor may be
required.
087 “NVM Checksum Flt” • EEPROM Checksum invalid • Restore factory defaults
• Save to EEPROM
• Clear fault queue.
Reset all parameters to correct values
088 “Fault Log Error” The fault log information stored in retentive memory was
determined to be invalid, the fault log has been cleared.
Possible causes include:
• Power loss occurred during a prior fault log save
• Regulator Board malfunction
Check regulator board and replace if
necessary.
089 “Invalid Field” The installed field supply is not supported by the regulator
possibly due to:
• Disconnected, loosely connected or damaged field
supply wires.
• Regulated field supply malfunction
• Regulator board malfunction
Check the field supply wiring, the
regulated field suppy and the regulator
board. Repair or replace as
necessary.
090 “Fld Fdbk Offset” Regulated field supply feedback offset is too high, possibly
due to:
• Disconnected, loosely connected or damaged field
supply wires
• Regulated field supply malfunction
• Regulator board malfunction
Check the field supply wiring, the
regulated field suppy and the regulator
board. Repair or replace as
necessary.
091 “uP HW/SW Fault” • Regulator microprocessor malfunction
• Electrical noise due to improper wiring practices or
unsuppressed brake coils, relays, or contactors.
• Disconnected, loosely connected or damaged Microbus
ribbon cable.
• Malfunctioning regulator board
Check regulator board and replace if
necessary.
100–599 “Microbus Fault” An error occurred on the Microbus possibly due to:
• Electrical noise due to improper wiring practices or
unsuppressed brake coils, relays, or contactors.
• Disconnected, loosely connected or damaged Microbus
ribbon cable.
• Malfunctioning regulator board
• Malfunctioning microbus peripheral
• Microbus peripheral found that is not supported by the
regulator firmware.
Check the microbus ribbon cable and
replace if necessary. Check the
regulator board and replace if
necessary. Check for noise sources
and correct if possible. Make certain
all leads and wiring are separated
correctly and run in proper conduit
with correct shield terminations.
600–699 “Memory Fault” • Regulator board memory malfunction Check regulator board and replace if
necessary.
700–749 “uP Hardware Flt” • Regulator board hardware malfunction Check regulator board and replace if
necessary.
750–799 “uP Exception Flt” • Unexpected regulator board interrupt.
• Possibly due to electrical noise from improper wiring
practices or unsuppressed brake coils, relays or
contactors.
Check regulator board and replace if
necessary.