Decoding Of Ace-0 Operating Faults - Stiga e-PARK 220 Workshop Manual

WORKSHOP MANUAL
e-PARK 220

9.4.4 Decoding of ACE-0 operating faults

The fault diagnosis system of the ACE-0/ KOMBI AC-0 controller is divided into 2 main fault groups:
a) ALARMS: these anomalies open the electrical section, i.e. they determine the opening of the
energy bridge and, if applicable, of the KZTP system and the application of EB. These are
anomalies linked to:
- motor /controller failures preventing the electrical system from operating the trolley
- safety-related faults
b) WARNINGS: These are faults which do not stop the machine or which stop it by means of a re-
generative braking system. In other words, the controller works correctly, but detects conditions
that reduce performance or stop the machine without opening the electrical devices. These
warnings are linked to
- incorrect operator sequences
- conditions requiring a reduction in performance (e.g. high temperature, etc.).
The following tables include the decoding of all messages, divided between "ALARM" and
"WARNING", with an indication of the actions to be taken for their solution.
a) ALARM Messages
Code Definitions
8 WATCHDOG
LOGIC
17
FAILURE #3
LOGIC
18
FAILURE #2
LOGIC
19
FAILURE #1
9 - ELECTRONIC MANAGEMENT - BATTERY
Probable Cause and Consequent Action
• Cause: This is a safety test. It is an internal self-diagnosis test of the mechanism.
The watchdog circuit consists of two single-stable multivibrators that guarantee double
verification of software execution.
• Solution: This alarm may be caused by a hardware fault in either (or both) of the
multivibrators, or by a software execution problem. In both cases, the fault is internal to
the controller and must be replaced.
• Cause: Hardware problem in the circuit board of the mechanism for high current
protection (overload).
• Solution: This type of failure is independent from external components, so when it
occurs, the control unit must be replaced.
• Cause: A fault has occurred in the hardware section of the mechanism board that
handles phase voltage feedback.
• Solution: This type of failure is independent from external components, so when it
occurs, the control unit must be replaced.
This fault appears when the controller detects an overvoltage or undervoltage condi-
tion. For the 24V controller, the overvoltage threshold is 35V and the undervoltage
threshold is 9.5V. For the 48V controller, the overvoltage threshold is 65V and the
undervoltage threshold is 9.5V.
• The troubleshooting message appears when the power is turned on or in standby
mode; in these cases, it is very likely that the fault is due to undervoltage and therefore
it is advisable to check:
A) Pulse lowering in the key input signal (above undervoltage threshold) due to exter-
nal loads, such as starting DC/DC converters, switching relays or contactors, power-
ing solenoids on/off.
B) If no transient voltages are detected on the power supply and the alarm appears
each time the key is activated, the fault is probably in the controller hardware, which
must be replaced.
• The troubleshooting message appears on the motor drive; in this case, it may be an
undervoltage or overvoltage problem.
A) If the alarm appears during traction acceleration or hydraulic operation, undervolt-
age is most likely to occur; check the battery charge and electrical cable connection.
B) If the alarm appears when you release the brake, it is most likely due to an overvolt-
age; check the line contactor contact and the battery power cable connection.
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