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Husqvarna PG 680 Operator's Manual Page 29

Floor grinder/polisher.
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Fault tracing table
Problem/Fault Code
Machine will not turn on
Opening display screens (V1.1)
does not change from 0,00 Hz on
the variable speed drives when I
switch my machine from STOP to
RUN
Opening display screen (V.1.1)
stays on 0,00 Hz on only one of the
varible speed drives when I switch
my machine from STOP to RUN
Display screen when on frequency
reference display (V1.1.2) will not
go all the way to 80 Hz on the large
variable speed drive
Display screen when on frequency
reference display (V1.1.2) will not
go all the way to 120 Hz on the small
variable speed drive
Display screen when on frequency
reference display (V1.1.2) will not
go all the way to 100 Hz on the
variable speed drive
DC link voltage (screen V1.18) is
less then 550 +/- 5V when the
machine is in stand by
MAINTENANCE
Possible Cause
The incoming power cable is not live
The EMERGENCY STOP button is
engaged
The safety circuit breaker is open inside
the electrical cabinet
Problem with the contactor on the back of
the POWER button
Problem with the connection of the wires
to STOP/RUN switch or with the
contactor on the back of the STOP/RUN
switch
Problem with the electrical connection
from STOP/RUN switch to on of the
FWD/REV switches
Problem with the wire connection from
FWD/REV switch to the frequency
inverter or with the contactor on the back
of the FWD/REV switch
Problem with the head speed
potentiometer on the control panel near
the handle bars
Problem with the wiring communications
into the variable speed drive
Problem with the data and programming
of the variable speed drive
Problem with the disc speed
potentiometer on the control panel near
the handle bars
Problem with the wiring communications
into the variable speed drive
Problem with the data and programming
of the variable speed drive
Problem with the disc speed
potentiometer on the control panel near
the handle bars
Problem with the wiring communications
into the variable speed drive
Problem with the data and programming
of the variable speed drive
Poor power supply coming into the
variable speed drive
Potential Solution
Check that incoming power is turned on
Twist the Emergency Stop button to release
Close circuit breaker to complete the circuit
Check that wires are connected and firm on
the back of the POWER button as on
machine model schematic. Check that the
contactor is engaging when the POWER
button is pressed.
Check that the stop run switch wires inside
the control panel are connected and firm
and are engaging and disengaging when
switch is turned.
Check that linkage wires between STOP/
RUN switch and the FWD/REV switches are
connected and firm as machine model
schematic
Check that linkage wires between FWD/
REV switches and frequency inverter are
firm and correct as machine model
schematic. Check that the contactor is
completely engaging and disengaging
when switch is turned.
Check wires into potentiometer, as machine
model schematic. Replace potentiometer if
needed.
Check the control panel cable and cable
into variable speed drive terminals for
damages
Re-programming required. Machine needs
to be checked by a Husqvarna service
agent
Check wires into potentiometer, as machine
model schematic. Replace potentiometer if
needed.
Check the control panel cable and cable
into variable speed drive terminals for
damages
Re-programming required. Machine needs
to be checked by a Husqvarna service
agent
Check wires into potentiometer, as machine
model schematic. Replace potentiometer if
needed.
Check the control panel cable and cable
into variable speed drive terminals for
damages
Re-programming required. Machine needs
to be checked by a Husqvarna service
agent
Check voltage and phases to grinding
machine at the first point of output power to
the grinder
English – 29

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