5 Replacing PartsFS100 5.3 Battery Replacement5-45.3 Battery ReplacementThe battery must be replaced as soon as the battery alarm occurred.Please be sure to replace it within 1 hour after the power is turned OFF.(When the programming pendant is used, a message to ask batteryreplacement appears on its window.Also, the timing can be confirmed by the lighting-up of the battery alarmLED on the CPU unit (CPU-201R) or the battery alarm of the specifiedoutput.)WARNING• To perform this operation, it is required to open the top plate of theFS100 while the power is turned ON.Do NOT open the plate to perform the operation within five minutesafter turning OFF the FS100 power supply and primary power source.• Do NOT touch units or terminal parts within five minutes afterturning OFF the FS100 power supply.Failure to observe this warning may result in electric shocks.• Close the top plate as soon as the maintenance work such as theinspection or maintenance, etc. is completed.Failure to observe this warning may result in electric shocks.WARNING• To prevent anyone inadvertently turning ON the power supplyduring maintenace operation, put up a warning sign such as “DONOT TURN ON THE POWER” at the primary power supply (knifeswitch, wiring circuit breaker, etc.) .Failure to observe this warning may result in electric shocks or injury.
