Troubleshooting; Troubleshooting For Hand Grips And Carburettor Heater (Xpg) - Husqvarna 565 Workshop Manual

19.1 Troubleshooting for hand grips and
carburettor heater (XPG)
Some chainsaws are fitted with hand grip heaters and
carburettor heaters, and consist of the following parts:
• Generator.
• Switch.
• Heating element in rear hand grip.
• Front handle with heating element.
• Carburettor heating element.
• Thermostat.

Troubleshooting

Trouble shooting can be carried out with most components
fitted on the chainsaw. Troubleshooting requires:
- ammeter
- ohmmeter
- cooling spray.
The most common fault is oxidisation of the heating element
contacts in the rear handle and the switch contact. Carry out
troubleshooting as follows:
Heating element in rear handle.
1. Separate the cable connection at (C).
2. Clean the contacts (C) and (D).
3. Measure the resistance between point (C) and (D).
The resistance for heating elements should be 0,8-1,0
ohms.
4. Replace the element if the values deviate.
Front hand grip with heating element
1. Measure the resistance in the front handle element
between points (C) and (B). The ohmmeter should
show 3-4 ohms.
2. If the value is higher, replace the handle.
Generator
1. Measure the resistance in the generator between the
points (A) and (E).
2. The ohmmeter should show 0,5 ohms. If the value is
higher, replace the generator.
Switch
1. Release one of the connections to the switch and
connect the ohmmeter between the points (A) and (B).
2. The ohmmeter should show more than 1000 ohms
with the switch in position "0".
3. The ohmmeter should show at least 0,1 ohms with the
switch in position "1".
4. Replace the switch if the values deviate.
Carburettor heating element and thermostat
1. The heating element and thermostat are in a single
unit and must be replaced together.
2. Release the earth cable (G). Measure with the
ohmmeter between (G) and (F).
3. The ohmmeter should show 0 at an air temperature
of 15 C or higher. Cool the thermostat with a cooling
spray or the like. The ohmmeter should show 8.
4. Replace the two elements if the values deviate.
5. Refit the relevant components.
52 - English
19 Troubleshooting
B
A
D
C
D
Fig. 1
Troubleshooting
C
F
G
E