ABB IRC5 Operating Manual page 409

the fault. Make sure all switches are working correctly. If there
is no loose connection, replace the faulty switch.
90226, General Stop conflict
Description
Only one of the two General Mode Safeguarded Stop chains
was opened.
Consequences
The system goes to status SYS HALT.
Probable causes
Any of the switches connected to the General Stop chain may
be faulty or not correctly connected, causing only one channel
to close. The General Stop chain is described in the Trouble
Shooting Manual, IRC5.
Recommended actions
Check cables and connections. Check other event messages
occurring at the same time to determine which switch caused
the fault. Make sure all switches are working correctly. If there
is no loose connection, replace the faulty switch.
90227, Motor Contactor conflict, DRV1
Description
Only one of the two motor contactors for drive system 1 has
acknowledged the activation order.
Consequences
The system goes to status SYS HALT.
Probable causes
A failure of the motor contactor auxiliary contacts or the supply
to these.
Recommended actions
Check cables and connections. Check the function of the
auxiliary contacts.
90231, Delayed Emergency Stop due to circuit
imbalance
Description
The system has detected an imbalance in the two parallel
Emergency Stop circuits.
Consequences
The system goes to status Emergency Stop after approximately
1 sec.
Probable causes
The contact pair in any of the Emergency Stop buttons is not
working correctly.
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Recommended actions
Isolate the Emergency Stop button causing the conflict. Check
the contact pair. Make sure all connections are tight. Replace
the button if required.
90232, Delayed Auto Stop due to circuit
imbalance
Description
The system has detected an imbalance in the two parallel Auto
Stop circuits.
Consequences
The system goes to status Guard Stop after approximately 1
sec.
Probable causes
The contact pair in any of the safety devices connected to the
Auto Stop circuit is not working correctly.
Recommended actions
Isolate the safety device causing the conflict. Make sure the
device used is a two-channel device. Check the contact pair.
Make sure all connections are tight. Replace the device if
required.
90233, Delayed General Stop due to circuit
imbalance
Description
The system has detected an imbalance in the two parallel
General Stop circuits.
Consequences
The system goes to status Guard Stop after approximately 1
sec.
Probable causes
The contact pair in any of the safety devices connected to the
General Stop circuit is not working correctly.
Recommended actions
Isolate the safety device causing the conflict. Make sure the
device used is a two-channel device. Check the contact pair.
Make sure all connections are tight. Replace the device if
required.
90234, Immediate Emergency Stop
Description
The Emergency Stop circuits have been broken.
Consequences
The system goes directly to status Emergency Stop.
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