© Ernst Nagel GmbH 2S Trimmer Service Manual en.doc Rev.1.0. 20.07.2011
53
Contents
5. Troubleshooting
(continued)
5.3 Fault Code Solutions
(continued)
STR 009
Motor3 Open Circuit
Procedure
Disconnect the motor plug M3. Enter service mode, unlock and start the Motor M3. Measure between the Red and Black wire.
The
voltage is approximately 12VDC?
Y N
Disconnect connector J7 and cycle Motor M3. Measure between the Red and Black wire. (Red1&Black8).
The voltage is
approximately 12VDC?
Y N
Disconnect plug 5P3 from PCB1 and cycle Motor M3. Measure between points 2 and 3.
The voltage is approximately 12VDC?
Y N
Replace
PCB5
Replace
wire
harness
Replace
wire
harness
Replace Motor M3
STR 010
Motor4 Cycle Timeout
Procedure
Enter the Service mode and select Trimmer Knife home position (STR S12) in Switches.
The switch indicates: 1 when activated,
and: 2 when not activated?
Y N
Go
to
STR 068 – S10 Faulty
Disconnect Motor4 (STR M4), enter the Service mode and select Motor3 (STR M3) in motors, unlock and start Motor3 (STR M3)
The
motor energizes?
Y N
Go
to
STR 009 – Motor 3 Open Circuit
Connect Motor4 (STR M4) Disconnect Motor3 (STR M3), enter the Service mode and select Motor4 (STR M4) in motors, unlock and
start Motor4 (STR M4)
The motor energizes?
Y N
Go
to
STR 012 – Motor 4 Open Circuit
1. Make sure that nothing interferes with the mechanical movement.
2. Lubricate where needed.
