Product Manual

(1) Protections
(1) General
The display shows the problem (Main Motor Converter Alarm) and a fault code (31 in this case).
(1) Main Motor Converter Alarm
(2) Fault
Fault code Cause Actions
1 Overcurrent Contact Atlas Copco
Ground fault Contact Atlas Copco
2 Too high voltage. The voltage on the
converter is above the
specifications.
Check the supply voltage
Contact Atlas Copco.
3 Too low voltage. The voltage on the
converter is below the
specifications.
Power quality faults
Check the supply voltage
Contact Atlas Copco
Check for loose wiring/wiring errors
Check supply voltage during start up
Check fuses transformer (200V, 230V, 500V and
575V units only)
Instruction book
102 2920 7109 21