Stiga e-PARK 220 Workshop Manual page 79

WORKSHOP MANUAL
e-PARK 220
Code Definitions
CURRENT
225
SENS. KO
POWER MOS
233
SHORTED
ANALOG
237
INPUT
239 EVP2 NOT OK
240 EVP1 NOT OK
AUX DRIVER
246
OPEN
WRONG SET
251
BATTERY
252 WRONG ZERO
AUX DRIVER
254
SHORTED
9 - ELECTRONIC MANAGEMENT - BATTERY
Probable Cause and Consequent Action
• Cause: One of the current sensors used to measure the current value on the motor
phases is damaged.
• Solution: This type of failure is independent of external components; replace the
controller
• Cause: Before turning on the KZTP system, the software checks the energy bridge:
it turns on the Mosfet transistors alternately at the top and bottom and waits for the
phase voltage to drop to -BATT (increases to +Batt). If the phase voltage does not fol-
low the commands, the alarm appears.
• Solution: This type of failure is independent of external components; replace the
controller
• Cause: This alarm appears when the A/D conversion of the analog inputs shows a
"frozen" value in all the converted signals for more than 400 msec. The objective of this
diagnosis is to detect an A/D converter error or a problem in the encoding flow that
omits the update of the analog signal conversion.
• Solution: If the alarm persists, the controller must be replaced.
• Cause:
A) EVP2 drive is short-circuited.
B) The micro controller detects a misalignment between the valve setting and the drive
voltage, measured at the EVP2 output.
• Solution: Check for a short circuit or low impedance between the negative pole of
the coil and -BATT. Otherwise, the drive circuit is damaged and the controller must be
replaced.
• Cause:
A) EVP drive is short-circuited.
B) The micro controller detects a misalignment between the valve setting and the drive
voltage, measured at the LOWER EVP1 output.
• Solution: Check for a short circuit or low impedance between the negative pole of
the coil and -BATT. Otherwise, the drive circuit is damaged and the controller must be
replaced.
• Cause: The activation of the electromechanical brake coil is unable to activate the
load.
• Solution: Replace the controller.
• Cause: At startup, the controller checks the battery voltage, which must be within a
range close to the rated value.
• Solution:
A) Check that the "SET BATTERY" parameter in the controller matches the rated bat-
tery voltage.
B) Check that the "TESTER MENU / BATTERY VOLTAGE" parameter shows the same
value as the battery voltage measured with a voltmeter. If the values do not match,
activate the "ADJUST BATTERY" function.
C) Replace the battery.
• Cause: The outputs of the amplifiers (used to measure the traction motor voltage)
should be checked to ensure that they are within a defined range. This alarm appears
when the voltage signals are >3V or <2V at the time of initialization.
• Solution: This type of failure is independent of external components; replace the
controller
• Cause: The activation of the electromechanical brake coil is short-circuited.
• Solution:
A) Check for a short circuit or low impedance pull-down between NEB CNA#4 and
-BATT.
B) The drive circuit is damaged inside the controller, and the controller must be re-
placed.
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