09/03
2-22
DC 3535/2240/1632, WC M24
3-321, 3-322
Initial issue
Status Indicator RAPs
3-321 IIT-ESS Communication Failure 2
Controller received check code error (wrong sequence number in sent message packet).
Procedure
Switch the power off then on. The problem continues.
YN
Return to Service Call Procedures.
Reinstall the software. If the problem continues, check the IIT/IPS PWB connectors (P/J Loca-
tions, Figure 30). If the check is OK, replace the IIT/IPS PWB (PL 18.3).
3-322 IIT-ESS Communication Failure 3
Controller received check code error (wrong packet number in sent message packet).
Procedure
Switch the power off then on. The problem continues.
YN
Return to Service Call Procedures.
Reinstall the software. If the problem continues, check the IIT/IPS PWB connectors (P/J Loca-
tions, Figure 30). If the check is OK, replace the IIT/IPS PWB (PL 18.3).