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ESIE06-05 Overview of Fault Indications and Safeties

Part 3 – Troubleshooting 3–9

OU4:EXTPCB COMM.ERR

Purpose:

■ Indicate if there is no communication with the Extension PCB (the extension PCB A01P cannot be

found).

OU4:MAINPCB COMM. ERR

Purpose:

■ Indicate if there is no communication with the main PCB 2 (double circuit).

Symptom: The alarm message shows EXT PCB COMM. ERR

POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE

The extension PCB (A01P)

cannot be found.

Check if the wiring to the

extension PCB (A01P) is

according to the wiring dia-

gram

Unit switched off.

RESET : After finding the cause and communication is restored, error can be reset on the control-

ler.

Symptom: The alarm message shows MAINPCB COMM. ERR

POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE

The main PCB of circuit 2

(A21P) cannot be found

Check if the wiring to the main

PCB of circuit 2 (A21P) is

according to the wiring dia-

gram.

Check if the “address setting”

and the “terminator resistor

setting” by DIP-swtich is

according to the setting men-

tioned in the wiring diagram.

Unit switched off.

RESET : After finding the cause and communication is restored, error can be reset on the control-

ler.