AF9ZP0BA - EPS-ACW REACH TRUCK - User Manual
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listed up truck, this is not a real problem but a warning that some aging (e.g.
grease in the transmission) or singular condition (e.g. very low temperature
grease) or some wear has occurred in the system.
SELCK 2.7 POWER:
occurs in case the actual current in the motor is detected
lower than the commanded motor current required to reach 25Hz speed. It reports
a problem in the power actuator of the system (including 3phase power bridge and
motor). A SELFCHECK #1 may help to clarify whether the problem is in the motor
or in the controller.
SELCK 2.8 STA #2:
occurs in case none of the above conditions has been
detected. So reading and deepen analysis of STATUS#2 information is needed for
deciding the proceeding.
Below is a list of cases leading to this SELCK 2.8 STA #2 instance.
1. STATUS #2 reports 2
ND
value (motor current) in the admitted range (14 or
15), 3
RD
value (motor current) in the admitted range (-14 or -15) but the 4
TH
value (motor resistance) lower than 180 milliohms. This situation reports to a
probable short circuit between two motor terminals
ALARMS recalling STATUS #2
1) FB SENSOR LOCKED
Alarm 0xFFF1 Group #0:
14.3 STATUS #5: measure of the insulation of the motor and battery
Reading STATUS #5 in the tester menu monitors the state of the voltage at the
motor terminals at key on when the three phase power bridge is still switched off
(see Figure 14.3-1 below). Three bias resistances (4.5K each give a total
impedance is about 1.5Kohms) keep the voltage at the motor terminal to about
13V. In case the motor or the controller has a leakage current to battery minus or
battery plus, a lower or higher voltage can be found. This situation probably reports
to a failure either in the three half bridges power drives or in the motor. It shows
real time two values in time sharing:
1
ST
VALUE:
long duration value (about 2secs): this is the bias voltage measured at
the motor terminals when the three phase power bridge is switched off. It is frozen
to the sample detected when either the diagnosis passed or when the alarm occurs
(INIT VMN NOT OK or CAPACITOR CHARGE alarms).
2
ND
VALUE:
first short duration value (about 500msecs): it is the voltage at the rail
capacitors when the 1
ST
VALUE has been picked on.
