3.2 Controller rack
3.2.1 Rack LEDs
You will normally not be able to see the controller rack, since it is normally in an enclosed switchboard. However, the
controller rack includes LEDs that can be useful for troubleshooting, and these are described here.
Module LEDs
PSM3.1, ACM3.1, EIM3.1, GAM3.1 and PCM3.1 each have a red status LED. The module status LED lights if the hardware
module self-check is not OK. If the controller power supply LED on PSM3.1 is red, the LED(s) at the top of the hardware
module(s) that failed the self-check may be red.
These LEDs are at the top of the hardware module inside the rack frame, and may be hidden by wiring or other equipment. If
there is not too much light, the glow from the LED(s) should be visible at the top of the rack.
INFO
The hardware modules' LEDs may be red while the controller is starting up, or during a software update. This is
normal, and does not mean that the hardware modules failed the self-check.
3.2.2 PSM3.1 LEDs
PSM3.1 supplies power to the controller.
Symbol Name Function
Power
Green: The power supply to PSM3.1 is OK, and all of the controller hardware module
self-checks were OK.
Red: The power supply to PSM3.1 is OK, but one or more controller hardware
module self-checks were not OK.
OFF: No power.
Internal communication
Green: The internal communication between the hardware modules in the controller
is OK.
Green (flashing): There is internal communication, however, the controller is starting
up, or there are internal communication problems.
OFF: There is no internal communication between the hardware modules in the
controller.
Controller extension rack
internal communication in
For future use to connect extension rack.
Controller extension rack
internal communication
out
For future use to connect extension rack.
PPM 300 Operator's manual 4189340910 UK
www.deif.com Page 35 of 157
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