Eated Handles And Carburettor Heating - Husqvarna 545 Workshop Manual

7.21 Handle heater and carburettor
heater
(550XPG, 550XPG TrioBrake)
Certain chain saw models can be fitted with a han-
dle heater and a carburettor heater and comprise
the following
• enerator
• Power switch
• eating element in the rear handle
• andle bar with heating element
• Carburettor heating element
• Thermostat
Troubleshooting
It is possible to troubleshoot with most parts fitted
to the chain saw. Troubleshooting requires
• Ammeter
• hmmeter
• Coolant spray
idation of the connectors in the heating
elements in the rear handle and the power switch s
contact plate is the most common fault.
Troubleshoot as follows
1
Loosen the screw holding the earth cable. See
Figure 1.
2
easure the resistance in the whole circuit by
connecting the multimeter to the earth cable and a
properly cleaned cylinder. See Figure 2.
A correct reading with the power switch set to
FF hm
A correct reading with the power switch set to
4 to 5 hm
3
Unscrew the two screws on the front handle and
remove the cover. See Figure 3.
Fig 1
Fig 2
Fig 3
Repair Instructions
47
English -