MX2020 AC Power Supply Module LEDs
Each AC PSM faceplate contains four LEDs. These LEDs are described
in Table 1. There are
a total of eighteen bicolor LEDs located in the craft interface, and
are labeled 0 through 8 for
the bottom nine PSMs, and 9 through 17 for the top nine PSMs. Both feeds are alive during
operation, but only one feed provides current. In addition, a PSM
failure triggers the red alarm LED on the craft interface.
Table 1: MX2020 AC Power Supply Module LEDs
Label | Color | State | Description |
|---|---|---|---|
| Green | On | Power is functioning normally with no alarms. |
Yellow | On | PSM controller is functioning normally. | |
— | Off | PSM is not functioning normally or the AC input voltage is out of range. | |
| Red | On | PSM is not functioning normally or the AC input voltage is out of range. |
— | Off | PSM is functioning normally. | |
| Green | On | AC input is within the required voltage range and the DIP switch is set to on. |
Yellow | On | AC input is out of the required voltage range. | |
— | Off | AC input to the PSM is not present. | |
| Green | On | AC input is within the required voltage range and the DIP switch is set to on. |
Yellow | On | AC input is out of the required voltage range. | |
— | Off | AC input to the PSM is not present. |