DISPLAY
READS |
POSSIBLE
CAUSES ARE: |
NO
STO
(no stop key on power up)
|
Disconnected remote stop switch.
Shorted remote stop switch.
Stuck or sticking stop switch.
Faulty display board. |
KEY
DN
(key down on power up)
|
Wrong key used when trying to access Test Mode.
Face plate keys damaged.
Faceplate keys shorted. |
NO
RPM |
Disconnected or faulty RPM/Hall effect sensor.
Misaligned RPM sensor.
Flywheel abrading the RPM sensor cable.
Dirty RPM sensor and disc (Optical sensor).
RPM feedback loss (Optical sensor).
Faulty MCB. |
SP
CNG
(abrupt speed change) |
Disconnected or faulty RPM/Hall effect sensor.
Misaligned RPM sensor.
Flywheel abrading the RPM sensor cable.
Dirty RPM sensor and disc (Optical sensor).
RPM feedback loss (Optical sensor).
Faulty MCB.
IR Comp adjustment. |
EL
STL, RNG, or LOST
(elevation stall or out of range)
|
Blown elevation fuses.
Faulty elevation motor.
Faulty MCB.
Faulty display cable.
Elevation count not within range.
Mechanical binding. |
EL
NOZ
(elevation cant find 0%)
|
Elevation count not within range.
Faulty elevation motor.
Faulty MCB.
Faulty display cable.
Blown elevation fuses.
Mechanical binding. |