Denyo DCA-600P, Instruction Manual

Page: 47 / 58

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5-2-2 Checking/every 250 hours
(1) Cleaning of air cleaner element
This element should be cleaned, regardless of operating
time, when the red piston of service indicator locks in the visible position.
- Dry dust clings on element -
Remove the air cleaner element and clean the element
with dry and clean compressed air.
• While it is being cleaned, check the element for any
damage. Replace if necessary.
• Before installing the air cleaner, wipe off dirt on the
element cover.
• When insert the element, insert the element com-
pletely pressing equal edge of element.
(2) Measurement of insulation resistance
A 500-V insulation resistance tester is required to
measure the insulation resistance of the generator.
In case of measuring with an insulation resistance
tester over 500VDC current, disconnect all connectors
from the AVR located in the control box before measuring.
Remove the load cables and earthing cable for the leakage relay.
Turn on the 3-phase circuit breaker, connect the insulation resistance tester between
bodywork earthing terminal and output terminal for measurement.
The result must be more than 1 M Ω . Otherwise, there is a risk of electric shock or fire.
Consult the distributor.
(3) Check on battery specific gravity
Measure the battery gravity if there is a suspicion that battery leakage has occurred especially
where there have been instances where the machine would not start.
The relationship between Battery Gravity and Battery Charging at 20
℃
.
battery Gravity battery Charging
Over 1.28 Over charged (need adjustment)
1.25 – 1.28 Optimal charging
1.24 – 1.25 Average
Below 1.24 Low charged (need adjustment)
In determining the specific gravity at a temperature other than 20
℃
, use the following formula:
S
20
= St + 0,0007 (t-20)
where S
20
: is the calculated specific gravity at 20
℃
.
St : is the measured specific gravity
t : is the battery solution temperature reading.