Mastervolt WHISPER 3,5 User Manual

26 April 2004 / WHISPER 3,5 / USA
TROUBLE SHOOTING
5.2.3 Warning
Generator must be shut off immediately if:
• Motor RPM suddenly rises or drops.
• Unusual noise comes from generating set.
• Exhaust gases suddenly colour dark.
• Engine failure warning light is on
5.2.4 Service address
If you cannot correct a problem with the aid of the mal-
function table, contact your Mastervolt Service Centre or
Mastervolt Amsterdam for an extended service list, tel:
INT +31-20-3422100 www.mastervolt.com.
5.3 SPECIAL PROCEDURES ALTERNATOR
5.3.1 Residual voltage check / excitation procedure
When residual magnetism disappears there is no resi-
dual voltage. Residual magnetism can disappear after
the generating set has been out of service for a long time
or suffered a short circuit. This can be solved by charging
the capacitor ("flashing") independently by a small 9 Volt
battery. This can be done while the engine is stationary
and the wiring is connected.
If the starter battery is used for flashing
one must take care. A short circuit can
cause heavy sparking, fire and injuries.
When flashing does not bring back voltage, the capaci-
tor(s) should be renewed. When this does not help, the
rotating rectifier diodes should be tested and a winding
resistant test should be executed.
5.3.2 Testing rotary rectifier diodes
The diodes in the rotor can be checked with a multimeter.
When both diodes are faulty the alternator will not generate
any voltage. When only one diode is faulty the alternator
will generate about half the normal voltage.
The flexible lead connected to the diode should be discon-
nected at the terminal end, and the forward and reverse
resistance checked. A healthy diode will indicate a very
high resistance (infinity) in the reverse direction, and a low
resistance in the forward direction. A faulty diode will give a
full deflection reading in both directions with the test meter
on the 10,000 ohms scale, or an infinity reading in both
directions. The problem can also be in a faulty surge
suppressor (which is a metal-oxide varistor connected
across the diodes) or the ESD capacitor. Replace the
diodes, the suppressors and the capacitors.
F
9V
Fig. 14.
1 2 3
1Varistor (420V);
2 EMC capacitors (4,7nF - 630V);
3 Diodes (25A - 1200V).
Fig. 15.
•
Injector blocked. Have the injector checked.
•
Loss of compression, sticking. Have the compression measured.
damaged piston ring. Clean or replace the rings.
•
Wear out of cylinder. Have the compression measured and have the
engine overhauled.
Over-temperature. • Overload. Take away the overload.
• Low oil level. Fill up with oil.
• Water inlet system blocked. Check the cooling system thoroughly.
• Broken impeller.
• Water strainer choked.
• Heat exchanger choked.
Engine stops very slowly • Engine should stop within 3 seconds When it takes more than 5 seconds the fuel
after pushing stopping button solenoid could be faulty: engine is stopped by
shut down fuel valve.

Mastervolt WHISPER 3,5 Specifications

General

Brand	Mastervolt
Model	WHISPER 3, 5
Category	Inverter
Language	English