© Ernst Nagel GmbH 2S Trimmer Service Manual en.doc Rev.1.0. 20.07.2011
59
Contents
5. Troubleshooting
(continued)
5.3 Fault Code Solutions
(continued)
STR 023
Motor7 Short Circuit
Procedure
Disconnect the Motor plug M7. Run the diagnostics.
Fault code STR 024(Open Circuit) is displayed?
Y N
Disconnect connector J6. Check wires for Short Circuit across leads. (Orange3 & Violet10)
Is there a short Circuit?
Y N
Disconnect plug 1P2 from PCB1 Check wires for Short Circuit across leads. (Orange2 & Violet9)
Is there a Short
Circuit?
Y N
Replace
PCB1
Replace
wire
harness
Replace
wire
harness
Replace motor STR-M7
STR 024
Motor7 Open Circuit
Procedure
Disconnect the motor plug M7. Enter service mode and cycle the Motor M7. Measure between the Orange and Violet wire.
The
voltage is approximately 22VDC?
Y N
Disconnect connector J6 and cycle Motor M7. Measure between the Orange and Violet wire. (Orange3&Violet10).
The
voltage is approximately 22VDC?
Y N
Disconnect plug 1P2 from PCB1 and cycle Motor M7. Measure between points 2 and 9.
The voltage is approximately 22VDC?
Y N
Replace
PCB1
Replace
wire
harness
Replace
wire
harness
Replace Motor M7