Dual Safeguard 400 controller FAULT

Hi guys,

On LOCATION-1 SCU-A (Side-A controller od Dual Safeguard 400) is gone to FAULT - the "F" LED is in RED, but there is no HALT CODE (controller state LED-s aren't turned on). The SCU-B is normally in operation.

Plant staff has done the restart in AUTO, and switched off/on controllers fuses, but the SCU-A state is unchanged. SCU-A is isolated and we have 3 days of Degraded mode timer remained, so tomorrow I'm going to LOCATION-1.

As I see it, I can try this actions:

1. Restart the SCU-A in CLEAR (install system SW / delete application), and if the controller goes to P2, return the switch to AUTO; load the DUAP with LOAP;U and resynchronize the controllers.

2. If this doesn't work, I'll have to replace the CPU module. The thing is that I have two spare CPU modules that were decommissioned two years ago from LOCATION-2. Their Base software is the same, but their Selected Options in Application Builder are different:

LOCATION-1 CPU Module:
Node type: Safeguard 400 1.6
Base software: QC01/QC05-BAS11 11.0/5.x
Selected Options: HIDL H2, IESD99X 1.0/0, QC01-LIB11 11.0, QC01-LIB12 11.0, QC05-CES11 5.x

LOCATION-2 CPU Module:
Node type: Safeguard 400 1.6
Base software: QC01/QC05-BAS11 11.0/5.x
Selected Options: HIDL H2, IESD99X 1.0/0, QC01-LIB11 11.0

So due to the fact that the Base Software is the same , can I simply take the spare controller from LOCATION-2, modify NET/NODE strapping jumpers as in SCU-A/LOCATION-1, and replace SCU-A/LOCATION-1 with the spare controller from LOCATION-2, and LOAP the DUAP from LOCATION-1 into the spare controller?

Or should I maybe take the PCMCIA card from SCU-A/LOCATION-1 controller and put it into spare controller from LOCATION-2 and then LOAP the DUAP into spare controller from LOCATION-2?

Is this system software/Selected Options stored in a Hardware chip, or in PCMCIA card or in the DUAP? And how can I find out which CPU type is in LOCATION-1/2 (PM150V04 or PM150V08)? I suppose, I can find out all this information written on the processor module card (System software and the CPU type)?

Thanks in advance,
Hrvoje