Nilfisk-Advance SC3000, Руководство по обслуживанию

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Control System 26 Service Manual – SC3000
Function Electronic Board Alarm Codes (continued)
P100549 P100552
Drive system alarms
Alarm on the function electronic board - YELLOW LED FLASHING
Alarm
Code
on the
display
No. of
flashes
on the
board
Meaning Condition Troubleshooting action
t2 2 Amperometric
protection
intervention.
Current draw in
to the drive motor
higher than the
parameter (see
page 32 - 33)
“INOM“ for more
than parameter
(see page 32 - 33)
“TMAX“ time.
Check the drive motor current draw: it has to be 6-8 amps without load and it
has to remain under 20 amps during operation.
t3 3 Electromagnetic
brake not present
Open circuit
between J5.1 and
J5.2
1. Check the continuity of the 2 wires of the electrobrake of the motorwheel
up to the 2 way connector J5 on the board.
2. Check for the electrobrake impedance: has to be about 40 Ohms.
3. If necessary substitute the electrobrake.
t4 4 Pedal input
activated by
ignition.
Pedal output on
J3.8 higher than
the parameter
(see page 32 - 33)
“DEADL” when
the machine was
switched on by the
key.
1. Check that the pedal returns into its released position when not pressed.
2. If necessary substitute the pedal.
t5 5 Drive system
power section
damage.
Internal board
mosfet short circuit.
1. Check any short in the main motorwheel wires.
2. Try to disconnect the 2 Ø6 mm fast connectors M1 and M2 from the
board, switch on the machine and press the pedal.
3. If the alarm still appears, substitute the board.
t6 6 Pedal input not
admitted.
Open circuit
between J3.7 and
J3.9 or pedal output
on J3.8 higher than
5 Volt.
Check the wiring from the pedal and the J3 connector pins 7, 8, 9.
From the battery – you have to measure:
- About 5 Volt on pin 7.
- From 0.7 to 4.5 Volt on pin 8 (it has to change moving the pedal).
- About 0 – 0.7 Volt on pin 9.
t7 7 Overcurrent
(motor D.C.).
Drive motor current
higher than 1.5
times the value
of the parameter
(see page 32 - 33)
“IMAX”.
1. Check any short in the main motorwheel wires.
2. Check the impedance of the motorwheel motor: it has to be about 0.6 –
0.8 Ohms.
3. If necessary substitute the motorwheel motor.
t8 8 Drive system
relay fault.
The Drive system
relays inside the
board is stuck
(always closed or
always open).
Substitute the board.
All the drive system alarms activates to cut off the power supply to the driving wheel motor (not to the ELEC-
TROMAGNETIC BRAKE), until reset from KEY input [except alarm t4 which is reset as soon as J3.8 voltage
(drive pedal output) became less then the value of the parameter “DEADL” (see table “Function electronic
board parameters” page 32 - 33). In case of simultaneous errors, the one with greater priority is shown first
(priority order is opposite to the number of flashes).