ZF MM9000 - Page 262

262 EN 3340.758.003a - 2014-11
APPENDIX B - QFA & DVTP
ENG-127 Rev A.1 02/12 Page 262
ENG-127 9000 Series Micro/ClearCommand Servo Throttle - Servo Clutch QFA & DVTP
Failure: Throttle Feedback Potentiometer failure
a Results: Throttle will go to Idle (if needed).
b Test Procedure.
1. Turn power ON to both Port and Starboard Processors. Take command at a Control Head.
2. Move the Port and Starboard Control Head levers to approximately ½ Ahead.
3. On the Port Processor, locate the 3-pin plug above the throttle servo on the Processor’s main
circuit board. Disconnect the plug from the circuit board.
• The Port Processor will move the throttle to Idle.
• The Port Control Heads will give an audible tone indicating a faulty throttle
feedback potentiometer.
4. Move the Port and Starboard Control Head levers back to Neutral.
5. Replace the 3-pin plug.
6. Acknowledge the error by pressing the transfer button.
7. Repeat test for Starboard Processor.
Failure: Clutch Feedback Potentiometer failure
a Results: Clutch will remain at last commanded position. Throttle will go to Idle (if needed).
b Test Procedure.
1. Turn power ON to both Port and Starboard Processors. Take command at a Control Head.
2. Move the Port and Starboard Control Head levers to approximately ½ Ahead.
3. On the Port Processor, locate the 3-pin plug above the clutch servo on the Processor’s main
circuit board. Disconnect the plug from the circuit board.
• The Port Processor clutch servo will remain at last commanded position.
Throttle servo will drive to Idle.
• The Port Control Heads will give an audible tone indicating a faulty clutch
feedback potentiometer.
4. Move the Port and Starboard Control Head levers back to Neutral.
5. Replace the 3-pin plug.
6. Acknowledge the error by pressing the transfer button.
7. Repeat test for Starboard Processor.