Husqvarna LC 551 iV - 7.3 Troubleshooting: Operational Stops

7.3 Troubleshooting schedule
Problem Possible cause Step Troubleshooting
To do
The prod-
ucts stops
when it is
operated,
the warn-
ing indica-
tor flash-
es.
The warning indicator shows
the error code 1: Transmis-
sion motor high temperature
alarm.
1
Make sure that the transmission motor
does not have grass on it.
Clean and let the
transmission motor
cool down.
2
Do a check that the wheels rotate without
much resistance.
Do a check of the
ball bearings in the
wheels and replace
them if necessary.
Do a check of the
inner wheels and
make sure that the
gear wheels has no
objects that can
cause damage.
3
Do not use the product in an area with
more slope than recommended.
No troubleshooting
is possible.
The warning indicator shows
the error code 3: Cutting mo-
tor high current alarm.
1
Operate the product without load on the
blade.
The product stops if
the load is to high.
2
Make sure that the blade is not blocked
and that it can rotate freely. WARNING:
Remove the safety key from the safety lock
and put it in the safety key holder. Remove
the battery and wait a minimum of 5 sec-
onds before you touch the blade!
Replace the blade
or the blade sup-
port if it is defective.
The warning indicator shows
the error code 4: Cutting mo-
tor MOSFET failure or short
circuit.
1
There is too high current in the transmis-
sion.
Replace the motor
if it is defective.
2
If the primary control MOSFET is out of or-
der, no troubleshooting is possible.
Replace the control
unit if it is defective.
The warning indicator shows
the error code 5: Cutting mo-
tor low speed alarm.
1
Operate the product with less load on the
blade.
Adjust the cutting
height.
The warning indicator shows
the error code 6: High cur-
rent alarm of the drive motor.
1
Overload of the transmission. Decrease the load
of the drive motor.
The warning indicator shows
the error code 7: Drive motor
MOSFET failure or short cir-
cuit.
1
There is too high current in the transmis-
sion.
Replace the trans-
mission if it is de-
fective.
2
If the primary control MOSFET is out of or-
der, no troubleshooting is possible.
Replace the control
unit if it is defective.
The warning indicator shows
the error code 8: Low voltage
alarm.
1
The battery is out of power. Replace the control
unit if it is defective.
The warning indicator shows
the error code 9: Battery
shutdown alarm.
1
The battery is too hot. Let battery cool
down before use.
The warning indicator shows
the error code 10: High tem-
perature alarm of heat sink in
the main controller.
1
The primary control unit is too hot. Let the
product become cool and try again after 15
minutes.
N/A
The warning indicator shows
the error code 16: Total sys-
tem high current alarm.
1
Make sure that the blade is not blocked
and that it can rotate freely. WARNING:
Remove the safety key from the safety lock
and put it in the safety key holder. Remove
the battery and wait a minimum of 5 sec-
onds before you touch the blade!
Replace the blade
or the blade sup-
port if it is defective.
1292 - 001 - Troubleshooting - 35