General Description 2-17LEDsPOWER LEDThe POWER switch of the CPU/IO module has an in-built LED. If the AC power is supplied, theLED of the primary POWER switch illuminates (only the primary POWER switch functions). Also,the CPU/IO module has the POWER LED to show the status of the module power status.CPU/IO Module POWER LEDLED indication Description ActionNot on Power supply is off. Check that the status LED 1on both CPU/IO modules ispowered off, and then pressthe POWER LED to power onthe system.On Power supply is on.CPU/IO Module Status LED 1, 2There are two kinds of LEDs that indicate the module status on the front and back sides of theCPU/IO module. The display combination of the two LEDs indicates the CPU/IO module status.StatusLED1Status LED2 Description ActionNot on Power supply is off.When the system is starting, theinitialization process is performed.Wait for a while; the LEDwill illuminate in green.Blinking ingreenIf the OS is running, duplexconfiguration is not made for oneof the components in the CPU/IOmodules.Check that the cable isfirmly connected. If the LEDdoes not illuminate in greenafter a while, record thestatus LED status, andcontact a maintenanceservice company.Not onGreen The device is duplexed andrunning normally.After the AC power is supplied, thedevice running in the standbypower mode is being initialized.Wait for a while. The statusLED 1 will be powered off,and the POWER switch willbe enabled.When the system is starting, theinitialization process is performed.Wait for a while; the statusLED 1 is powered off.Amber Not onWhen the OS is running, theCPU/IO module has a problem.Check that the cable isfirmly connected. If the LEDdoes not illuminate in greenafter a while, record thestatus LED status, andcontact a maintenanceservice company.
