ELECTRICAL SYSTEM
20 – English
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 cylinder cover and disconnect the connector
on the red lead at A. See fig. 9.
2. Prise out the on/off switch with the help of a screwdriver.
See fig. 8.
3. Switch the on/off switch to position ”0”.
4. Connect 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 .
If the reading is higher, replace the rear hand grip element.
5. Connect the ohmmeter as shown in fig. 10 and measure
the resistance in the front handle heating element. The
meter should read 3 - 4 . If the reading is higher , replace
the front hand grip.
6. Connect the ohmmeter as shown in fig. 11 and measure
the resistance in the generator. The ohmmeter should
read between 0.9 - 1.3 . 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 fig. 12.
The meter should read more than 1000 with the switch
In the ”0” position.
The meter should read at most 0.1 when the switch is
in the ”1” position.
8. Reassemble the relevant components.
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
0.7-1.2
3-4
0.9-1.3
0.1/1000
A
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.
