Control System 24Service Manual – SC500
Function Board (EB1) Alarm Codes (Continues)
Drive system alarms
Alarm on Function Board - FLASHING YELLOW LED
Alarm code
--------------------------
Description
No.
ashes
on
board
Meaning Condition
Effect
Service Suggestions
T2
-----------------------
DRIVE MOTOR
OVERLOAD
2 Amperometric
protection
intervention.
Drive motor current
draw greater than the
parameter (see page 29 -
30) “INOM” for more than
the parameter (see page
29 - 30) “TMAX”.
Drive blocked. Check the current draw of the drive motor
(this should be around 6-8amps without
load and remain below 10-12amps during
operation).
T3
-----------------------
RELEASE THE
PADDLE !
3 Paddle not in rest
position when
board is turned
on.
Voltage on J1.2 of board
EB2 out of range 1.29V
- 1.49V with respect to
- BAT.
Drive blocked. Check that the paddle moves correctly,
lubricating if necessary; check the linkage
and potentiometer.
T4
-----------------------
PADDLE INPUT
FAILURE
4 Incorrect voltage
measured at
the paddle
potentiometer
input.
Voltage on J1.2 of board
EB2 above 3V.
Drive blocked. 1. Check the connection of the
potentiometer to the board.
2. Replace the potentiometer.
3. Replace the display board.
T5
-----------------------
HARDWARE
FAILURE
5 Drive system
power section
damage
MOSFET short circuit.
Drive blocked. 1. Check that the cables of the gear
motor are not short circuited (try
disconnecting the connectors from
contacts M1 and M2) and try starting
the machine and pressing the pedal
again
2. If the alarm persists, replace the board
T6
-----------------------
DRIVE MOTOR
FAILURE
6 Overcurrent
(motor D.C.)
Drive motor current
draw greater than 1.5
times the value of the
parameter (see page 29 -
30) “IMAX”.
Drive blocked. 1. Check that the gear motor cables are
not short circuited
2. Check that the motor of the gear
motor unit is not short circuited (the
impedance of the motor should be
around 0.6 – 0.8 Ohm)
3. If necessary, replace the gear motor
unit motor
T7
-----------------------
OVERHEATING
7 Drive motor drive
section thermal
cut-out.
The heatsink on the
board has reached a
temperature of 194°F
(90°C).
Drive blocked. 1. Check the drive motor power draw
and that the openings of the electrical
compartment are not blocked.
2. If everything is within normal
parameters, this may simply have been
caused by extreme working conditions
such as: Ambient temperature over
86°F (>30°C), sloping working sections.
Simply leave the system to cool and
turn the machine back on.
All alarms of the drive system operate by cutting the power supply to the gear motor unit motor until the KEY input is reset
(with the exception of alarm T3 which is reset as soon as the input voltage of the paddle potentiometer returns within the val-
ues corresponding to “machine stopped”). In case of simultaneous errors, the one with greater priority is shown rst (priority
order is opposite to the number of ashes).
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