Doosan 7/31E - Page 53

OPTIONS 49
7/26E, 7/31E, 7/41
FAULT FINDING
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 manual