PLCXSRVerified · sol.ls-electric.com
XSR OS2-3 — OS2 FAIL LED 3 blinks - Internal Relay Error
Critical — power cycle required
CAUSE
Why does it occur?
FAIL LED red, 3 blinks: internal output safety relay fault
REMEDY · Step by step
How to fix it?
Replace the module
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Verified · sol.ls-electric.com
Open manual ↗XSR Safety Relay 사용 설명서 (MF2/FB3/OS2/ES2 통합)
3.4 LED 표시 진단