HOSS - Owner's Manual 33
DIAGNOSTICS AND FAULT FINDING
DX diagnostics can be examined from two platforms : from the Flash Codes signalled with the System Status LED
on the joystick module (and on the HHP); and from the Wizard which can provide more detailed information about
the fault.
Flash Code
Any fault condition on the DX system will cause the joystick module's System Status LED to flash. Flashing occurs
in bursts of flashes separated by a two second pause. The number of flashes in each burst is referred to as the Flash
Code and indicates the nature of the fault. The title of the Flash Code fault is also displayed by the HHP if connected
to the faulty wheelchair.
Faults that affect the safety of the chair will cause the chair to stop while less critical ones will be indicated but allow
the chair to continue driving. Some faults will automatically clear when the fault condition is removed, in which case
the System Status LED will become steady and the wheelchair may be driven normally. Other faults are latched and
must be cleared by turning the DX System off, waiting for five seconds, and then turning it back on again.
DX System
Likely Cause of Condition and Probable Action
Status LED
Flash Code
1
DX Module Fault
(see Limp Mode below)
Cause: An Auto Download has occurred.
Action • Turn the Joystick module off then on again.
Cause: The DX System is not correctly programmed.
Action • Try reprogramming the system.
Cause: Connection between DX Modules may be faulty, or there may be an internal fault
in a Module.
Action • Check DXBUS connections and replace where necessary.
• If the Status LED on another Module is flashing, replace the Module.
• An expected module may not be present (e.g. the DX Lighting Module).
2
DX Accessory Fault
Cause: There is a fault in an accessory device attached to a DX Module (excluding the
PM). Examples of faults in accessory devices may be: the clutch is, or has been,
disengaged; a light bulb is short or open circuit; an actuator terminal is shorted to
B.
Action • Check all accessory devices connected to your DX System.
Cause: The Slow / Stop input on the CLAM or TAM is not connected, or is set to slow
or stop.
3
Left (M1)
Motor Fault
Cause: The connection from the PM left (MI) connector to its associated motor, or the
motor itself, is defective. The connection is either open or short circuit
Action • Disconnect the left motor plug and check continuity between the motor pins on
M 1.
• Ensure there is no continuity between motor and park brake terminals.
