Skyjack SJ 3220, Service Manual

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SJ3220, SJ3226, SJ4720, SJ4726, SJ4732 223198ABA
Skycoded Module Section 5 – Procedures
Fault Code Description
F18:LOW ELEV.CLOSE
The point at which the Angle Transducers are closed while the platform was lowering, is too low (it
should open between 5% and 20% height).
F19:HIGH ELEV.CLOSE
The point at which the Angle Transducers are closed while the platform was lowering, is too high (it
should open between 5% and 20% height).
F20:HEIGHT1<>0%
After fully raising and fully lowering the Platform, during dynamic or static calibration, we should
always be back at 0% height!
F20:HEIGHT2<>0%
F22:HEIGHT1<>100%
After fully raising the Platform, during static calibration, we should always lift to 100% height!
F22:HEIGHT2<>100%
F24:TOO MANY
During static (loaded or empty) calibration, no more than 20 measurement points can be recorded!
A properly working machine with lift cylinder pressure reliably indicating platform load, should not
require more than 10 measurement points.
F27:BAD HEIGHT
During static (loaded or empty) calibration, the platform height is out of range (below 0% or above
100%, or below 0.4V or above 4.6V).
F30:BAD HEIGHTS
At the end of static (loaded or empty) calibration, the sequence of recorded height measurements
is invalid!
F34:REJECT CURVE
At the end of dynamic calibration, the recorded height/pressure curve is checked – the expected
curve has a high pressure peak near the bottom (due to maximum lift needed when the scissor
arms are nearly horizontal), a low pressure trough near the middle, and a higher peak near the top.
F40:REJECT DELTA
DOWN @
At the end of all static calibrations, the loaded and empty height/pressure curves are compared
– the loaded curve should be higher than the empty curve, due to the additional platform load.
IMPORTANT: Make sure that loaded calibration is done with rated load in the platform, and empty
calibration is done with no load in the platform!
F40:REJECT DELTA
UP @
F42:LOW PRESSURE When the platform is fully lowered, the lift cylinder pressure cannot be checked – therefore soon
after lifting begins during static (loaded and empty) calibration, the lift cylinder pressure is checked.
This make sures that a hydraulic problem is discovered early, instead of waiting till calibration has
been completed but with bad data!
The lift cylinder pressure transducer output must be between 0.4V and 4.6V at all times.
F43:HIGH PRESSURE
F44:LOW PRESSURE
During static (loaded or empty) calibration, the lift cylinder pressure is out of range (below 0.4V or
above 4.6V).
F45:HIGH PRESSURE
F46:CHECK ELEV
During dynamic calibration, the Angle Transducer changed state (closed to open, or open to
closed) more than once!
F47:CHECK ELEV
F48:BAD PRESSURE
At the start of calibration, the pressure sensor is out of range (output must be between 0.3V and
4.8V at all times)
F49:TOO FEW
At the end of static (loaded or empty) lifting or lowering calibration, too few measurements were
taken (a minimum of 4 measurements is required).
Check that SETUPS/HEIGHT SETUPS/MIN LIFT is not set too high. Recommended values are
between 1s for fast lifting machines, and 3s for slow lifting machines.
F52:NOT
CALIBRATED! Something happened to cause calibration to fail – it is recommended to check all sensor
wiring for loose connections, then repeat calibration.
Fault Code List (Continued)