Mec 4069RT - OTHER Messages

“4069RT” Service and Parts Manual March 2014
Page 4-21
TROUBLESHOOTING -- EZ -CAL RETRIEVE MODE AND HELP MESSAGES
CANBUS M ESSAGES
This section lists “CANBUS” HELP messages – problems have been detected with
CANBUS communications between different modules (of course, only applicable if
more than one module is connected together via CANBUS):
FAULT: CANBUS! _______________________________________ Flash Code: 6/6
• There are problems with CANBUS communications between the different modules; messages
expected from one or more module are not being received, or messages intended to one or
more module cannot be transmitted.
• Check for open- and short- circuit problems with CANBUS wiring; ensure that the CANBUS is
wired correctly pin-to-pin; ensure that the vehicle chassis is not erroneously shorted to the
chassis (for example, due to insulator breakdown in the motor).
POWER WIRING M ESSAGES
The following are “power wiring” HELP messages – problems have been detected
which are likely due to power wiring errors:
FAULT: CAPBANK VOLTAGE TOO LOW - CHECK STUD WIRING! Flash Code: 7/7
• The voltage on the B+ stud of the controller (connected to an internal voltage stabilization
capacitor bank) is too low (a pre-charge circuit in the module normally applies approximately
32 volts to the capacitor bank and B+ stud).
• Check the 300 amp fuse, line contactor or power wiring for errors. Also check DC motor for
internal grounding. Possible motor controller failure.
OTHER M ESSAGES
The following are other HELP messages:
SOME BIG BAD PROBLEM! _______________________________ Flash Code: 9/9
• This message should not occur!
FACTORY OVERRIDE ___________________________Flash Code: (fast flashing)
• When the controller is first shipped, prior to initial calibration, it is configured in a special “fac-
tory override” state. In this state, none of the normal shutdowns or interlocks will occur – the
vehicle can be freely lifted/lowered and driven irrespective of any calibration needs, vehicle tilt,
etc.
• As soon as an EZ-Cal is connected to the controller, the factory override state is ended.
• If calibration does not occur, then the factory override state will recur if the EZ-Cal is discon-
nected and power is switched off/on.
IMPORTANT: – Never use a vehicle in factory override; this state is ONLY intended
for use during manufacture! While factory override is active, the LED is rapidly
flashed on/off.