Mec Speed Level 2684 RT Service And Parts Manual page 131

T
R O U B L E S H O O T I N G
SENSOR M
E S S A G E S
The following are "sensor" HELP messages – problems have been detected which are
likely due to sensor issues (CE models).
FAULT: CHECK HEIGHT1 SENSOR _________________________ Flash Code: 6/1
FAULT: CHECK HEIGHT2 SENSOR _________________________ Flash Code: 6/1
• A height sensor is giving an out-of-range voltage (below 0.5V or above 4.5V).
FAULT: CHECK HEIGHT SENSORS _________________________ Flash Code: 6/1
• When two height sensors are fitted, both should read the same height at all times; this mes-
sage indicates that the sensors are reading different heights. Check for loose sensors and/or
re-calibrate.
FAULT: CHECK PRESSURE SENSOR _______________________ Flash Code: 6/2
• A pressure sensor is giving an out-of-range voltage (below 0.5V or above 4.5V).
FAULT: CHECK ELEVATION SWITCH _______________________ Flash Code: 6/3
• The elevation switch is in disagreement with the height sensor(s).
• During calibration, the height at which the elevation switch opens (while lifting) and closes
(while lowering), is recorded. Subsequently, height and these calibration points are continu-
ously checked – any significant difference generates this error.
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
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 when the line contactor is off (a pre-charge circuit in the module
normally applies approximately 32 volts to the capacitor bank).
• Check the 300 amp fuse, line contactor or power wiring for errors. Also check DC motor for
internal grounding.
"3084 Speed Level™ Sigma Lift" Service and Parts Manual
- 3 0 8 4 R T - - E
M O D E L S
CE MODELS
E S S A G E S
- C R M
Z A L E T R I E V E O D E
A H M
N D E L P E S S A G E S
November 2009
Page 4a-27