What are the other troubleshooting guidelines for the SPZ-8000 in F900?

How do you explain the difference between LAFCS-RAFCS and COUPLED LEFT, COUPLED RIGHT?

SPZ8000 SWITCHING

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Here is a few pointers on ENGAGE logic from a Honeywell quick troubleshooting guide (my comments in red):

 

SPZ-8000 Autopilot Engage Logic

What is needed to satisfy the engage mode:

Stall warning not active (2 on the 900)

TCS P/B not pushed

YD Quick-disconnect P/B not pushed

AP Quick-disconnect P/B not pushed

Go-around P/B not pushed

Manual Trim not active (Also, Emergency trrim in the pedistal on the 900)

DADC valid

AHRS valid

Ground Engage Inhibit not active (no WOW engage allowed  on the 900)

Servo Power Valid

What takes place when the A/P is engaged:

The FZ-800 is allowed to control the servos.

What components are part of the engage command:

TCS P/B

YD Quick-disconnect P/B

AP Quick-disconnect P/B

Go-around P/B

Manual Trim P/B

DADC

AHRS

WOW

What is need to satisfy the disengage mode:

To have any of the engage signals change state.

What takes place when the A/P is disengaged:

The FZ-800 is not allowed to control the servos.

What components are part of the disengage command:

Same as engage.