Generator Failure
Page 46 Panda_12mini_PMS_Digital_s00865_Installation manual.V02 - Chapter C: Generator Failure 23.1.07
Should a steady sound or no sound have to be heard, the capacitor is defective and must be
replaced.
In order to go surely that the capacitor has still its full capacity, use a capacity measuring
instrument.
The capacitors, which not achieve the imprinted capacity value at this measurement, should be
exchanged as fast as possible. If all capacitors are still functional, must be checked whether the
connection to the strip is correct.
Checking the electrical connections to the capacitors
It must be ensured that the electrical connections to the capacitor are always tight fitting. Loose
connections with transitional resistance can mean that the contact surfaces will become heated
externally. This can lead to faster deterioration of the capacitors.
C.4.3 Checking the generator voltage
In order to test, whether the fixed winding produces enough voltage, proceed in such a
way:
1. Guarantee that the connection to the electrical system is interrupted.
2. Remove all conductions in the power terminal box of the generator.
3. Starter battery must be connected with the generator.
4. Start the generator start.
5. Measure with a voltmeter the votage between the phase(s) and N. If the measured values are
under the substantially values in Table 1, “Voltage values stator coil,” on Page V, a coil
damage is to be accepted.
During the measurement in the 60Hz version both partial coils must be interconnected, i.e. a con-
nection must be provided between line 1 and line 3. (see wiring diagram)
(notes: the voltage results from the remainder magnetism of the rotor, which induced a voltage in the coil.)
C.4.4 Measuring the coil resistance
For this a measuring instrument must be used that is suitable for low impedance values.
• Adjust the measuring instrument to resistance test. If hold the poles of the measuring instru-
ment hold together, 0.00 ohms should be indicated. If the poles are isolated, the display should
indicate an overflow. Please implement this test, in order to examine the equipment.
• Measure of the resistance within the individual windings.
If strong deviations in the individual coils are measured, must assumed that there is a coil short-
circuit in a coil. This leads to the fact that the generator does not excite itself any longer.
The actual values between the coils and ground are not to be determined exactly. It depends pri-
marily on the fact that the values of all three measurements are close to the same. Deviations
among themselves refer to a coil short-circuit. In this case the generator must be wound again by
a specialist.
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