Doosan 7/53, Руководство по эксплуатации и обслуживанию

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OPTIONS 45
7/53
The earth leakage circuit breaker should also be tested every 3
months. A proprietary test meter should be used to induce live to earth
preset flow at each socket outlet. This current flow will produce the
required earth fault check. The test should be conducted in accordance
with appropriate national standards.
Instruments and controls
A Voltmeter is provided to indicate the output voltage.
Miniature circuit breakers provide over-current protection. In the event
of excess current the appropriate circuit breaker will trip to the
OFF
position.
GENERATOR FAULT FINDING
NOTE: The current trip rating is quoted at a nominal 40°C ambient
temperature.
An earth leakage circuit breaker provides additional protection in the
event of a leakage to earth in excess of 30 milliamperes on the
connected appliance or in the connections to the generator.
For alternator maintenance refer to Mecc Alte operation and
maintenance manual.
FAULT CAUSE REMEDY
No output. Load plugs not
fitted into
socket outlets
correctly
.
Ensure that the load plugs are
fitted correctly into the socket
outlets.
No output. Loose
connection. Remove end cover and terminal
box lid and check for loose
connections. Rectify the fault as
necessary.
Faulty rectifier. Check the rectifier bridge which is
located inside the rear housing.
Faulty
capacitor. Check the capacitors.
The No load
voltage is low
but increases
when
a load is
applied.
Check the capacitors and
associated wiring.
The No load
voltage falls
when a load is
applied. Check the capacitors and
associated wiring.
Loss of residual
magnetic field Refer to Mecc Alte maintenance
manual
No output. Output
winding(s)
damaged. Measure the voltage across the
winding(s). Replace the generator
if damaged.
Field winding
damaged. Replace the generator.
Generator
fails to
provide
maximum
output. Engine is not
running at full
speed. Check the engine speed with a
tachometer. Consult the company
if the engine is found to be
running slow (Refer to section 4
General Information ).
Drive belt is not
tensioned
correctly. Re-tension the drive belt.
Drive pulley is
loose on the
drive shaft. Check the drive pulley and tighten
as required.
FAULT CAUSE REMEDY
The output
voltage
collapses
when a load
is
connected. Overload
condition. Check and reset each circuit
breaker. If the condition persists
then investigate the cause and
rectify the fault as necessary. (see
also ’
Circuit breaker trips ’)
Short circuit. Check for a short circuit and
rectify the fault as necessary.
Incorrect wiring . Check the wiring and rectify the
fault as necessary.
Circuit
breaker trips. Overload
condition. Check and reset each circuit
breaker. If the condition persists
then investigate the cause and
rectify the fault as necessary. (see
also ’
Circuit breaker trips ’)
Short circuit . Check for a short circuit and
rectify the fault as necessary.
Fault in
appliance
.
Check the appliance and rectify
the fault as necessary.
A circuit
breaker fails
to re-set
whilst the
machine
running
.
Circuit breaker
latching
mechanism
faulty. Repair or replace as necessary.
Refer to Engine Manufacturer’s manual and Mecc Alte
manufacturer’s manua l