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(5) Check on battery specific gravity.
If battery is likely to be discharged due to failure in startup of the engine, measure
the specific gravity of battery acid.
The relation between battery charge condition (charging rate) and specific gravity is as
shown below.
Liquid
temp.
Charging (℃)
rate(%)
２０
０
－１０
１００
1.28
1.29
1.30
９０
1.26
1.27
1.28
８０
1.24
1.25
1.26
７５
1.23
1.24
1.25
Each value has a deviation of ±0.01.
When the charging rate is below 75%, the battery needs to be recharged.
「8-1. Caution on battery charge
」
(6) Emission carbon deposition check
Deposition of carbon (soot, unburned fuel) in the exhaust pipe line and muffler could cause not only
system derates but also could lead to fires. To destroy soot and unburned fuel, run the unit at rated
power until the exhaust gas become mostly colorless every 250 hours operation time. More carbon
will be generated when the unit operates at less then 30% of rated power. In this case, perform the
above procedures more frequently.
NOTE:
・ Applying a large load suddenly to the unit when the carbon deposition is generated in the exhaust
system could produce sparks and will lead to abnormal combustion. Therefore, apply load gradually
and observe the exhaust gas color during the process.
・ Sparks may come out of the exhaust gas outlet during load operation. Make sure the unit’s
surrounding is free from any flammable material.
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