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Troubleshooting Schedule; To Use The Common Service Tool (Cst) - Husqvarna LC 551 iV Workshop Manual

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7.5 Troubleshooting schedule

Problem
Possible cause
The control panel is defec-
The LED
tive.
indicators
on the
Wire fault.
control
panel
The primary control unit is
does not
defective.
work.
The product is overloaded.
The control panel is defec-
The
tive.
SavE
function
Wire fault.
does not
work.
The primary control unit is
defective.
Wire fault.
The micro switch in the han-
dle is defective.
The transmission is defec-
The drive
tive.
does not
work.
The primary control unit is
defective.

7.6 To use the common service tool (CST)

The CST transmits data from Husqvarna products and
the batteries to a computer (not included). There is a
diagnostic tool list and a list of saved error codes. The
CST can also update the software in battery products.
Note: To make sure that the product is fully updated you
must do the updates on battery slot 1 and battery slot 2.
1. Remove the battery from the product.
2. Connect the adapter cable (A) to the battery (B) and
to the battery slot connector (C) on the product.
1292 - 001 -
Step
Troubleshooting
Do a visual inspection.
1
Do a check of the wires, refer to the wiring
1
diagram.
No troubleshooting is possible.
1
With increased load the product switches
1
from SavE
to standard mode.
Do a visual inspection.
1
Do a check of the wires, refer to the wiring
1
diagram.
No troubleshooting is possible.
1
Do a check of the wires, refer to the wiring
1
diagram.
Examine the micro switch in the motor con-
1
trol box. Make sure there is a click sound
when the power bar is pulled.
Make sure that the voltage comes to the
transmission. The voltage from the trans-
mission must be equal to the battery volt-
age. The safety key must be in position 1,
1
the ON button must be pushed and the
power bar must be pulled. Measure the
current on the wires to the transmission
when the transmission is on.
No troubleshooting is possible.
1
3. Connect the cable (D) to the CST.
C
4. Start the product, turn the safety key to 1.
5. Push the ON/OFF button on the control panel.
6. On the computer, select the model type of the
connected product.
To do
Replace the control
panel if is defective.
Replace defective
wires.
Replace the pri-
mary control unit if
it is defective.
N/A
Replace the control
panel if it is defec-
tive.
Replace defective
wires.
Replace the pri-
mary control unit if
it is defective.
Replace defective
wires.
Replace the switch
box assembly.
Replace the trans-
mission if it is de-
fective.
Replace the control
unit if it is defective.
A
B
D
Troubleshooting - 37

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Lb 548 i