Generator Failure
8.7.08
Panda PMS 8.000 NE - 42 NE Manual.R04 - Kapitel B: Generator Failure Seite 55
B.5 Generator provides no voltage
B.5.1 Rotor Magnetism Loss and "Re-magnetising"
ATTENTION! “Safety Instructions” on Page iv
In the case of asynchronous generators, the generator cannot independently increase voltage
after standing still, or, if it is switched off under full load. This is because the rotor has lost its
remaining magnetism.
This remaining magnetism can be restored simply by use of a DC battery. In
addition the "shore power"must be switched off and any connection to an AC-
source must be interrupted.
Likewise the generator must be switched off, i.e. also the starter may not be
operated. The power source selector is switched to "generator". Only the plug
socket must be connected with the generator.
Now the two poles of a 9 Volt battery are connected to the plug socket or held
against the appropriate contacts of the on-board current distributor. Do not use a battery bank or
the generator starter battery, this could damage the winding. The DC voltage only may be applied
for a short time (1-2 seconds). In the winding the remaining magnetism is restored by a short cur-
rent pulse, and the generator can normally be started.
B.6 Engine Starting Problems
B.6.1 Fuel Solenoid Valve
The fuel solenoid valve is located in front of the injection pump. It opens automatically, if the
"START"-button is pressed on remote control panel. If the generator is switched to "OFF", the
solenoid valve closes. It takes some seconds, before the generator stops.
If the generator fails to start, runs rough, does not reach the proper RPM, or does not stop pro-
perly, the first item to suspect in most cases it is the fuel solenoid valve and should be inspected
first.
A check of the fuel solenoid valve by removing the plug from the fuel solenoid valve for a short
period whilst in operation (first remove the small retention screw) and replace it immediately. The
motor should "react immediately" by revving high. If the motor does not react sharply to the
reconnection of the solenoid wire, it is a sign that the solenoid valve could be faulty.
