Husqvarna PG 680 Operator's Manual page 30

Red light has come on at the control
panel during operation
F1.1 on display panel, Over current
F1.3 on display panel - Earth fault
F1.9 on display panel - Under voltage
F1.11 on display panel - output phase
supervision
F1.14 on display panel - unit over
temperature
F.1.15 on display panel - motor stalled
F1.16 on display panel - motor over
temperature
30 – English
MAINTENANCE
Fault codes appear on the display screen
inside the electrical cabinet
Motor worked to hard drawing extra
current
Short circuit between phases on output
side of variable speed drives
Input phase L1 missing at contactor
Internal motor failure (rare)
Short circuit between phases on output
side of variable speed drives
Motor failure (rare)
Insufficient voltage supply to machine
Power supply to variable speed drives
has been turned off
Short circuit on output side of variable
speed drives. No current in one of the
power phases at the motor.
Variable speed drives are over
temperature due to high temperature in
the working environment or broken
temperature sensor
Motor stall protection has tripped; the
motor is working too hard and is drawing
extra current
Mechanical jam between ginding discs
beneath the grinding head
Mechanical jam on the planetary drive
Motor worked to hard drawing extra
current
Check the fault code on the display
screen and respond accordingly
Check that current is drawn when the
machine is running. Reduce speed
setting and current draw back into
acceptable limits as out lined in the
electrical diagnostics manual
Check wiring in plugs connected to
motor cables or inside connection boxes
on motors
Check incoming wiring at power plugs
and contactor
Have motor tested. Replace if needed.
Check wiring in plugs connected to
motor cables and inside the terminal
boxes on motors for loose earth wires
Have motor tested. Replace if needed.
Check power supply and ensure correct
voltage. Check power source at the wall
supply.
Re-connect power to grinder. Check DC-
link (screen V.1.18) in both the standby
(550 +/-5) and run mode (500+/-5)
Check the wiring in the plugs connected
to motor cables and inside terminal
boxes on motors
Open door on the electrical cabinet to
increase ventilation. If needed have the
variable speed drives tested by a
Husqvarna service agent.
Check the current being drawn when the
machine is running. Reduce motor
speed settings via the potentiometers on
the control panel near the handle bars
and draw current back into acceptable
working limits according to "Monitoring
Menus Output Frequency"
Tilt the machine back and inspect the
grinding discs for foreign items. Rotate
grinding discs by hand to see if jam
exists. Ensure that all three grinding
discs rotate togehter. If one grinding
discs rotate individually a broken belt is
causing an internal jam. Contact
Husqvarna service agent.
Tilt the machine back and try to rotate the
planetary head by hand, to see if jam
exists. This should be firm but not
impossible. Remove cover and clean
away any debris.
Check the current being drawn when the
machine is running. Reduce motor
speed settings via the potentiometers on
the control panel near the handle bars
and draw current back into acceptable
working limits according to "Monitoring
Menus Output Frequency"