ELECTRICAL SYSTEM
22 – English
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
0,7-1,2
ohm
3-4
ohm
0,9-1,3
ohm
0,1/1000
ohm
A
Hand grip heater
Trouble shooting
Trouble shooting can be carried out with most components
in place on the saw. For trouble shooting an ohmmeter
is required.
Carry out trouble shooting as follows:
1. Remove the c ylinder cover and disconnect the
connector on the red lead at A. See fi g. 9.
2. Prise out the on/off switch with the help of a
screwdriver. See fi g. 8.
3. Switch the on/off switch to position ”0”.
4. Connec t the ohmmeter as shown in fig. 9 and
measure the resistance in the rear hand grip heating
element. The meter should read 0.7 - 1.2 Ω.
If the reading is higher, replace the rear hand grip
element.
5. Connect the ohmmeter as shown in fi g. 10
and measure the resistance in the front
handle heating element. The meter should read 3 - 4
Ω. If the reading is higher, replace the front hand grip.
6. Connect the ohmmeter as shown in fi g. 11
and measure the resistance in the generator.
The ohmmeter should read between 0.9 - 1.3 Ω.
If the reading is higher or lower, replace the generator.
7. Disconnect one of the connections to the on/off
switch and connect the ohmmeter as shown in fi g. 12.
The meter should read more than 1000 Ω with the
switch In the ”0” position.
The meter should read at most 0.1 Ω when the
switch is in the ”1” position.
8. Reassemble the relevant components.
Some chainsaws are equipped with hand grip heating.
The hand grip heater comprises the following components.
• Generator
• On/off switch
•
Heating element in the rear hand grip (tank unit).
•
Front hand grip with heating element.
