CAP SCREW 0L0139 - Caterpillar

Electric Power GenerationC175-16 GEN SET (S/N: WYB1-UP)C4.4 GEN SET (S/N: LC51-UP; GLD1-UP; MZT1-UP)C6.6 GEN SET (S/N: LC61-UP)C7.1 GEN SET (S/N: L7C1-UP; ETG1-UP)Engine3412C (S/N: RTY1-UP)3512C (S/N: YBD1-UP)3516B (S/N: YAR1-UP; YBT1-UP)3516C (S/N: SFJ1-UP; SEK1-UP)Generator SetC15 GEN SET (S/N: C5E1-UP; NAP1-UP)C18 GEN SET (S/N: EKW1-UP; NAW1-UP)C27 GEN SET (S/N: DWB1-UP; GDS1-UP)C32 GEN SET (S/N: JSJ1-UP; JAZ1-UP)C9 GEN SET (S/N: NBP1-UP)Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Early hour failure of the 356-5379 Alarm Module Gp. The failure mode is typically the module has no lights, unable to communicate, does not work, and internal defect open-shorted. Alarm panel inoperable, found green light flashing at bottom and RS485 annunciator circuit failed.Solution
Removed the original 356-5379 Alarm Module Gp and replaced with a new 356-5379 Alarm Module Gp.Reference: Application & Installation Guide, LEBE0006, EMCP 4.1, 4.2 GENERATOR SET CONTROLReference: Application & Installation Guide, LEBE0007, Cat® EMCP 4.3 and 4.4 Generator Set Control.RS-485 Annunciator
The RS-485 Annunciator uses a custom master-slave communication protocol. The EMCP 4 controller will be the Master, and