The purpose of Pre-charge relay Fault (CRF1) is to check the closing of the pre-charge relay/contactor.This fault appears only for the size 2 to 5B.
Probable causes: -
=>Failure of the command of the pre-charge relay or deterioration of the charge function (resistor).
=>Unstable DC bus voltage.
Remedies: -
=>Change the power section or the power board.
=>Change the control block.
=>Check input voltage.
Probable causes: -
=>Failure of the command of the pre-charge relay or deterioration of the charge function (resistor).
=>Unstable DC bus voltage.
Remedies: -
=>Change the power section or the power board.
=>Change the control block.
=>Check input voltage.
Released for:Schneider Electric India
