Powered by Eaton Technology VSD Series Drives User Manual
LIT-1201828
For more information visit: www.johnsoncontrols.com B-1
November 2009
Appendix B — Fault and Warning Codes
Table B-1: Fault Codes
Fault
Code Fault Possible Cause Solution
1 Overcurrent VSD Series drive has detected a
high current (>4xI
n
) in its output
due to:
• sudden heavy load increase
• short in the motor
• short in the cables to the
motor
• unsuitable motor
Check loading.
Check motor.
Check cables.
2 Overvoltage The DC-link voltage has
exceeded its high limit due to:
• too short a deceleration time
• high voltage levels or surges
in the utility supply
Make the deceleration time
longer.
Use brake chopper and brake
resistor (standard on some
models, available as options on
others).
Correct utility supply voltage
(level is too high).
Add input impedance to limit
surges.
3 Ground (Earth) Fault Current sensing indicates that
the sum of motor phase currents
is not zero.
• insulation failure in motor or
motor cables
Check motor and motor cables.
5 Charging Switch The charging switch was open,
when the START command was
given due to:
• faulty operation
• component failure
Reset the fault and restart.
Should the fault re-occur,
contact your Johnson Controls
distributor.
6 Emergency stop An Emergency stop signal was
received from one of the digital
inputs
Determine reason for the
Emergency stop and remedy it.
7 Saturation trip • defective component
• motor or motor cable short
Cannot be reset from the
keypad.
Switch off power.
IF THE PROBLEM IS NOT IN THE
MOTOR OR ITS CABLES, DO
NOT RE-CONNECT POWER!
Contact your Johnson Controls
distributor.
If this fault appears
simultaneously with Fault 1,
check the motor and motor
cables.
8 System fault • component failure
• faulty operation
Note: exceptional fault data
record, see Active Fault Menu for
more information
Reset the fault and restart.
Should the fault re-occur,
contact your Johnson Controls
distributor.
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