Atlas Copco GA 45 VSD - Page 130

Instruction
book
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1904 0504 83 
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(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
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6 à 2 Ù
á
Þ ¥ Ù ß ç
C
6 à 3 Þ I 1 Ù Ø ß ç 3
1 ß Û Þ 1 ß ç 9 Þ Ü Ù Þ Ü
Û Ø 3 â 2 6 Ý
1 UU Too low voltage. The voltage on the Check the supply voltage.
converter is below the specifications. Contact Atlas Copco.
2 OU Too high voltage. The voltage on the Check the supply voltage.
converter is above the specifications. Contact Atlas Copco.
3 OI.AC Too high current. The converter is Contact Atlas Copco.
overloaded.
21 O.ht1 Converter overheating (IGBT) Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
22 O.ht2 Converter overheating (heat sink) Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
24 th Motor overheating (thermistor) Check the ambient temperature.
Clean the motor cooling fins.
Contact Atlas Copco.
27 O.ht3 Converter overheating (thermal model) Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
32 PH High input voltage phase imbalance or Check supply phases.
input phase loss Contact Atlas Copco.
102 O.ht4 Converter overheating (Power module) Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
(blank) (blank) Various Contact Atlas Copco.