12 Bottom Blowdown
Mk8 MM Manual Page | 232
Figure 12.5.2.ii Servo Closed
When first enabled, the Bottom Blowdown Module must detect the servomotor at the closed position to clear
the ‘Servo in Other Position’ warning.
Press to drive the servomotor to the closed 0.0° position. Pressing will drive the
servomotor into the closed or open direction. Pressing will stop the servomotor driving.
When the servomotor is moving, the message ‘Servo Closing’ will appear, and when it has reached the
closed position, the message will change to ‘Servo Closed.’ The positioning potentiometer on the blowdown
servomotors does not need to be zeroed.
Press to drive the servomotor towards the closed position using the battery power within the Bottom
Blowdown Module.
When charged, the Bottom Blowdown Module battery should measure 13VDC+, if this falls below 12.4VDC,
there will be no enough power in the battery to drive the valve to the closed position should a power failure
occur, in this case a Bottom Blowdown Controller Main Power Fault will be triggered.
To test the battery operation, drive the servomotor to the closed position, then press . The
servomotor will drive the valve to the parked position using mains power, and then it is drives it to the closed
position using the battery power to test the battery. If the battery cannot drive the valve to the closed
position, a Bottom Blowdown Servo Battery Drive Fault will be triggered.