ABB procontrol P coupling midule 87ts01 R2233

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ABB procontrol P coupling module 87ts01 R2233, Error is module processing function stopped.

Due to module function stopped Bus fault alarm persisting in CDS (Control Diagnostic System for Module online status). Can we change this module during respective unit (Boiler-Turbine) is in service mode. or During module change this unit will trip.

Please assist me more on this subject. Here we have Power desalination plant. This module is signal receiving from common SF6 380kv area (bus bar) to Unit (For Boiler Turbine)
 
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