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Troubleshooting Schedule - Husqvarna LC 551 iV Workshop Manual

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7.3 Troubleshooting schedule

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

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Lb 548 i