Nilfisk-Advance SC500 Service Manual page 24

Service Manual – SC500
Function Board (EB1) Alarm Codes (Continues)
No.
Alarm code
flashes
--------------------------
on
Description
board
F2 2
-----------------------
BRUSH MOTOR
OVERLOAD
F3 3
-----------------------
VACUUM
MOTOR
OVERLOAD
F4 4
-----------------------
DECK
ACTUATOR
FAILURE
F5 5
-----------------------
HARDWARE
FAILURE
F6
6
-----------------------
PRESSURE
GAUGE
FAILURE
F7 7
-----------------------
OVERHEATING
F8 8
-----------------------
BRUSH MOTOR
FAILURE
F9
9
-----------------------
VACUUM
MOTOR
FAILURE
Function electronic board alarms
Alarm on Function Board - FLASHING RED LED
Meaning Condition
BRUSH motor The motor current is
amperometric greater than the value of
protection. the parameter (see page
29 - 30) VS1
VACUUM The current draw of the
SYSTEM vacuum motor is greater
amperometric than 30A for over 10
protection. seconds.
DECK Current greater than 4A
ACTUATOR detected for more than 1
overcurrent. second.
Short circuit on MOSFET short circuit.
the vacuum or
brush motor drive
MOSFET.
PRESSURE -
GAUGE
FAILURE
(Not used)
Motor drive The heatsink on the
section thermal board has reached a
cut-out. temperature of 194°F
(90°C).
Brush motor I > 150A for 20µsec.
output short
circuit.
Vacuum I > 150A for 20µsec.
motor output
overcurrent.
Effect Service Suggestions
Brush motor Check the current draw of the brush motor.
output stop. It should remain below the value set in the
parameter "VS1" during operation.
Vacuum system 1. Check for any debris in the vacuum
block. motor.
2. Check that the motor rotor turns freely.
3. Replace the vacuum motor if
necessary.
Brush function 1. Check that there is no friction on
block. the brush deck linkage; lubricate if
necessary.
2. Check that the actuator and deck
travel is not blocked by mechanical
obstructions.
3. If the problem persists, replace the
actuator.
Function block.
1. Check that there are no short circuits in
the motor wiring.
2. Replace the board.
- -
Function block.
Check the vacuum and brush motor power
draw and that the openings of the electri-
cal compartment are not blocked.
Function block.
Check for short circuits in the wiring or
motor.
Function block. Check for short circuits in the wiring or
motor.
Control System 23