WEG CFW-09 - Faults and Possible Causes; Diagnostics and Troubleshooting

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CHAPTER
7
DIAGNOSTICS AND TROUBLESHOOTING
This chapter assists the user to identify and correct possible faults that
can occur during the CFW-09 operation. Guidance on Preventive
Maintenance is also provided.
When a fault is detected, the inverter is disabled and the Fault Code is
displayed on the readout in the E
XX
form, where XX is the actual Fault
Code. (ie. E01).
To restart the inverter after a fault hasoccurred, the inverter must be reset.
The reset can be made as follows:
Disconnectingand reapplyingAC power (power-on reset).
By pressing the key (manual reset).
Automatic reset through P206 (auto-reset).
By digital input: DIx = 12 (P265 to P270).
By Serial interface.
By Fieldbus interface.
The table below defines each Fault Code, explains how to reset the fault
and shows the possible causes for each Fault Code.
7.1
FAULTSAND POSSIBLE
CAUSES
FAULT
RESET
POSSIBLECAUSES
E00
Power-on
Short-circuit between two motor phases
Output
Manual reset (Key
)
Short-circuit between braking resistor cables
Overcurrent Auto-reset
When the output current reaches 2 x P295, caused by: very high
DIx(Digital Input)
load inertia, acceleration ramp too fast or incorrect regulation and/
Serial
or configuration parameters
Fieldbus
Transistor module shorted
P169 to P172 set too high
E01
Power Supply voltage too high, check Ud in P004:
Overvoltage (Ud)
220-230 V Models - Ud > 400 V
380-480 V Models - Ud > 800 V
500-600 V and 500-690 V Models with power supply between
500 V and 600 V
- Ud > 1000 V
500-690 V models with power supply between 660 V and 690 V
and 660-690 V models
- Ud > 1200 V
Load inertia too high or deceleration ramp too short
P151 or P153 set too high
E02
Power Supply voltage too low, DC Link check Ud in P004:
Undervoltage (Ud)
220-230 V power supply - Ud < 223 V
380 V power supply - Ud < 385 V
400-415 V power supply - Ud < 405 V
440-460 V power supply - Ud < 446 V
480 V power supply - Ud < 487 V
500-525 V power supply - Ud < 532 V
550-575 V power supply - Ud < 582 V
600 V power supply - Ud < 608 V
660-690 V power supply - Ud < 699 V
Phase loss at the input
Auxiliary circuit fuse blown (only valid for 105 A and 130 A/220-230 V,
86 A to 600 A/380-480 V and 44A to 79 A/500-600 V refer to item 3.2.3)
Pre-charge contactor defective
P296 set to a voltage higher than the power supply voltage
Table 7.1
- Faults and possible causes