c5738d67__Codes___Telecomuserguides_com__Explanation
[0] 274 [Action] Check if two CIIs are installed. If not, change the CII so that it is compatible with the current KSU. [Explanation] 
An extra CII box was plugged in or the CII plugged in is incompatible with the KSU.
Nortel Systems User Guides, Nortel Error Codes - Telecomuserguides.com
Explanation