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09/03

2-34

DC 3535/2240/1632, WC M24

3-348, 3-349

Initial issue

Status Indicator RAPs

3-348 IOT-ESS Communication Failure 8

Controller received check code error (IOT over-run error).

Procedure

Switch the power off then on. The problem continues.

Return to Service Call Procedures.

Reinstall the software. If the problem continues, check the MCU PWB connectors (P/J Loca-

tions, Figure 15). DC 3535 only: Replace the VSEL PWB (PL 13.1). If the problem persists,

replace the MCU PWB (PL 13.1).

3-349 IOT-ESS Communication Failure 9

Controller received check code error (transmission aborted after header received).