Trouble Shooting; Alternator/ Electrical Faults; General - Mastervolt WISPER 8ULTRA 1500 RPM User Manual

TROUBLE SHOOTING

5 TROUBLE SHOOTING
5.1

ALTERNATOR/ ELECTRICAL FAULTS

Beware of parts which are live!
Remove 3 Amp. Fuse in the control panel
while working on the generator to prevent the
engine from starting
A failure code is displayed when a hardware failure at the
generator is detected
5.1.1

General

If any problem should occur, check basic conditions and
examine all external wiring, switch gear and circuit
breakers. Also check if measuring instruments give the
correct value. If in doubt, measure directly on the
alternator terminals with an independent instrument. This
should only be carried out by an experienced electrician.
If during these measurements the engine immediately
stops after starting and an error code is displayed at the
remote control panel ( "AC VOLTAGE"), one can start the
generator by means of a "service start" at the service
Failure code Problem
Communication error between the panel end the generator
COMMUNICATION
Starter battery voltage too low
LOW START BAT
No output battery charging voltage
ALTERNATOR
Exhaust temperature is too high
EXHAUST TEMP
Coolant temperature is too high
WATER TEMP
Oil pressure failure
OIL PRESSURE
Generator AC output voltage is either too high or too low
AC VOLTAGE
Generator is in overload
HIGH CURRENT
Output frequency of the generator is too low
FREQUENCY
26
menu (see paragraph "service start" of the user's manual
of the Digital Diesel Control). By doing this, the generator
will keep running for 2 minutes before it stops. This offers
you the possibility to carry out measurements to
investigate the cause of the failure.
Check if the engine is running correctly at 1500 (50 Hz)
RPM according to its settings and does as well under load.
•
Whisper 8 Ultra: A RPM drop of 5% at full load is
acceptable. Therefore a no load setting should be at
1575 RPM = 52.5 Hz. Under no circumstances should
the RPM under full load be below 1470 RPM = 49 Hz.
•
Whisper 10 Ultra: A RPM drop of 1% at full load is
acceptable. Therefore a no load setting should be at
1515 RPM = 50.5 Hz. Under no circumstances should
the RPM under full load be below 1485 RPM =
49.5Hz.
When the problem is in the RPM refer to the engine fault
finding paragraph.
Digital Diesel Control system will help to indicate failures
and display causes.
December 2009 / WHISPER 8 & 10 ULTRA / EN / Copyright © 2009 Mastervolt