Dynaset HG 1, Руководство пользователя, Страница: 54 / 72

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54
HYDRAULIC GENERATORS
MAINTENANCE
6.6. TROUBLESHOOTING
Performing the maintenance tasks requires a qualified hydraulic mechanic or/
and electrician. Please, contact DYNASET authorized workshop or dealer for more
maintenance information.
FAILURE
REASON CORRECTIVE ACTION
LOW OUTPUT VOLTAGE
AT NO LOAD
Poor contact in electric
system.
Check all internal contacts and wirings
of the generator. Check and clean
brushes and slip ring (HG6,5 ... HG 20)
OUTPUT VOLTAGE <
20Vac
Excitation rectifier’s failure.
Trace the failure and replace the
rectifier. (HG3,5 ... HG10 with
Compound or Capasitor voltage
regulator)
Voltage regulator’s failure.
Replace the capacitor (HG3,5 ... HG5,0).
Check and adjust the air gap of the
compound regulator. Replace if
broken (HG6,5 ... HG10).
Check and adjust or replace the
electronic regulator. HG with AVR
Insufficient residual
magnetism.
Use external 12 V DC battery for 1 - 2
sec. to magnetise the rotor (HG3,5 ...
HG5,0).
LOW OUTPUT VOLTAGE
AND FREQUENCY AT
LOAD
The generator is being
overloaded.
Reduce the load and check the current
I (A) to ensure that the proper load is
being applied.
LOW FREQUENCY AT
NO LOAD
Too low rotation speed.
If frequency is out of range, hydraulic
system failure is concerned
Check whether the hydraulic flow and
pressure are sufficient. Adjust RPM-
cartridge if necessary.
Check the hydraulic motor for
possible leakage. Replace the motor if
necessary.
HIGH FREQUENCY AT
LOAD
Too high rotation speed.
If frequency is out of range, hydraulic
system failure is concerned
Check whether the hydraulic flow and
pressure are sufficient. Adjust RPM-
cartridge if necessary.