Troubleshooting Table Frequency Converter - Husqvarna PG820 RC Operator's Manual

Troubleshooting table frequency converter

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
TROUBLESHOOTING
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
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
English – 43