Olympian generator I am trying to run a Model OLY0000VRTG01817 GENERATOR. The line to line voltage is 400V, but the engine speed is very high and hence the frequency is greater than 50Hz. It is around 60-70Hz. I want to bring the rpm hence the frequency down to 50Hz. What must I do? Or what is wrong. The control card on this machine is 201/2001 SERIES CONTROL PBA0009C

There could be several reasons why the output voltage of your generator is not within the normal range. Here are a few things you can check:

1. Make sure the generator is properly grounded.
2. Check the voltage regulator. It could be malfunctioning and causing the high voltage output.
3. Check for loose or damaged wiring. Any issues with the wiring could cause the voltage to be incorrect.
4. Check the engine speed. If the engine speed is too high, it could cause the voltage to be higher than normal.
5. Check the load on the generator. If the load is too low, it could cause the voltage to be higher than normal.

If you are unable to identify and fix the problem, it is recommended to have a professional technician diagnose and repair the generator.

DTC P1637

The powertrain control module (PCM) / engine control module (ECM) uses the charge indicator control circuit, and the generator 2 turn on signal circuit on diesels with dual generators, to control the generator(s). A high side driver within the PCM/ECM allows the PCM/ECM to turn the generator ON and OFF. When generator operation is desired, the PCM/ECM sends a 10-11 volts-volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the generator is enabled by the PCM/ECM, the voltage regulator controls generator output independently of the PCM/ECM. Under certain operating conditions, the PCM/ECM can turn OFF the generator by turning OFF the voltage on the charge indicator control circuit. The PCM/ECM has fault detection circuitry which monitors the state of the charge indicator control circuit. If the fault detection circuit senses a voltage other than what is expected, the charge indicator will turn ON and this DTC will set. The voltage regulator also contains fault detection circuitry. If the regulator detects a problem, the regulator will ground the charge indicator control circuit, pulling the voltage low. This also causes the charge indicator to turn ON and the PCM/ECM to set the DTC.

What engine is in your truck ?

DTC P1638

The powertrain control module (PCM) uses the generator field duty cycle signal circuit to monitor the duty cycle of the generator. The generator field duty cycle signal circuit connects to the high side of the field winding in the generator. A pulse width modulated (PWM) high side driver in the voltage regulator turns the field winding ON and OFF. The PCM uses the PWM signal input to determine the generator load on the engine. This allows the PCM to adjust the idle speed to compensate for high electrical loads.
The PCM monitors the state of the generator field duty cycle signal circuit. When the key is in the RUN position and the engine is OFF, the PCM should detect a duty cycle near 0 percent. However, when the engine is running, the duty cycle should be between 5-100 percent. The PCM monitors the PWM signal using a key ON test and a RUN test. During the tests, if the PCM detects an out of range PWM signal, DTC P1638 will set. When the DTC sets, the PCM will send a class 2 serial data message to the IPC to illuminate the charge indicator.

The reasons of no power generation:
1. The voltmeter of the control panel is damaged or the wiring is in poor contact. This situation is generally after the diesel generator starts normally, and the voltage on the meter sometimes does not move. It is necessary to use a multimeter to measure the U, V, W, N phases of the motor, and the phases between U, V, and W. The voltage is about 400v, and the voltage between single-phase U, V, W and N is about 230v.

2. The air switch on the electric ball in the diesel generator is damaged: the phenomenon that occurs is that the diesel generator is normal when it is started, and it trips when the load is turned on.

3. Brushed motor equipped with diesel generator: The disadvantage of brushed motor is that demagnetization occurs occasionally, so it is necessary to keep 1-2 pairs of carbon brushes to prevent this situation.

4. The starting elements are not reached: the starting elements of diesel generators refer to the speed of 1500 rpm, frequency of 50HZ, and voltage of 400v. Many users feel that the noise of diesel generators will be very large when this data value is reached, so they reduce the speed by themselves. , the consequence is that the voltage is not enough, the frequency is not enough, and the power is not generated. After a long time, the power of the diesel generator will be insufficient.

5. Damage to the voltage regulating plate: The function of the voltage regulating plate is to adjust the excitation current correspondingly according to the change of the generator load, so as to maintain the terminal voltage as a given value, which can obviously smell the smell of burning.

The above are the common reasons for the failure of diesel generators to generate electricity summarized by our editor. We hereby suggest that if your diesel generator has not expired, please contact the diesel generator manufacturer to provide guidance on operation, and try not to repair it yourself.

More solutions, you can visit https://www.dbdieselgenerator.com

Usually the cause of slightly low voltage like this is that the engine is not running at full operating RPM. Find the high speed adjusting screw on the govenor linkage and adjust the engine RPM until the output is 220V - 240V

If it is an FG Wilson 55KW Olympian you need to check the AVR and make sure it has a field output feeding the exciter stator, then check the rotor diodes, check each one with a meter, low res one way high the other with meter leads. If any are bad change them all, check the exciter rotor, then the main rotor and stator for open or shorted windings. If you give me the exact model I can maybe help more

On the engines carb. is a governor rod should connect to the front case of the engine. This rod should have an adjustment to slow the engine speed. BUT,,, are you reading the generator unloaded or without any thing plunged into it? Once you have the generator loaded with a device, the voltage should drop to a constant 240vac. 150 rpms should not make that big a difference on the voltage output, and if running under load the RPM's should drop also..

I need a model number for your ENGINE not the whole generator. I believe this is a case of the engine not running fast enough. I.e governor adjustment will be necessary. Respond with an Engine model number and I will stll you how to adjust the governor speed.

This is GENERIC but the Governor arm has a spring that connects to a speed plate. The speed plate has a stand off screw and nut used for speed adjustment and a center nut for securing the speed plate in a fixed position. The Steps are to slightly loosen the center nut and the locking nut on the speed adjustment screw. Start the unit with a meter reading output power voltage (use extension wire for meter) Then turn the speed increase screw in to increase speed. When you reach 122-123 VAC stop. The reason you adjust it to 122-123 VAC is because voltage will drop as the generator provides power loads
Tighten the screw lock nut while running if possible and tighten the center nut on the speed plate to secure it in place. Check voltage again.

If you generator is running at normal speed and you have low voltage output... most of the time the Capacitor is failing. If the capacitor is failing the magnetic field in the armature and stator collapse under above average loads causing HUGE voltage swings.

Thanks for choosing FixYa,
Kelly

Those voltage readings MAY be normal.

The AC waveform may cause your meter to read inaccurately. You would need to use a TRUE RMS meter to accurately read the voltage.

The siple meters actually read the AVERAGE voltage and then are calibrated to mulltiply it by the "form factor" for a sine wave. OFTEN these generators don't produce a clean sine wave. A square-ish wave will read higher on the garden variety meters.

Compare the brightness of a lamp comparing to when run on your utility.

The frequency depends on engine speed ... yours is running a bit fast...check it under at least half load and if off, adjust the govenor slightly.

If you have anything plugged into the generator, consuming any electric, it will run at high. It must run at high speed to generate 120V. It will only idle if your turn off the load.

the instructions says the voltage regulator is automatic/digital. when you check the voltage is there any load on the generator? if applying load to the generator doesn't help, you can manually change the motor speed where the governor connects to the carborator, but it may change the frequency, but the regulator may fix it