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Home›Repair guides›EDIT; AND DEBUG. (See the Appendix - "Menu System".)

Generac 20kW — EDIT; AND DEBUG. (See the Appendix - "Menu System".)

For the Generac 20kW.

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Procedure

  1. 3.2 AUTOMATIC TRANSFER OPERATION To select automatic operation, do the following:
  2. 1. Make sure the transfer switch main contacts are set to their UTILITY position, i.e., loads connected to the utility power source (Figure 3.1).
  3. 2. Be sure that normal UTILITY power source voltage is avail- able to transfer switch terminal lugs N1 and N2 (Refer to the Electrical Data section).
  4. 3. Set the generator’s AUTO/OFF/MANUAL switch to AUTO.
  5. 4. Set the generator’s main circuit breaker to its ON (or CLOSED) position. With the preceding steps complete, the generator will start auto- matically when utility source voltage drops below a preset level. After the unit starts, loads are transferred to the standby power source. Refer to the Sequence of Automatic Operation section.
  6. 3.3 SEQUENCE OF AUTOMATIC OPERATION
  7. 3.3.1 UTILITY FAILURE Initial Conditions: Generator in Auto, ready to run, load being sup- plied by utility source. When utility fails (below 60% of nominal), a 10 second (optionally programmable) line interrupt delay time is started. If the utility is still gone when the timer expires, the engine will crank and start. Once started, a five (5) second engine warm- up timer will be initiated. When the warm-up timer expires, the control will transfer the load to the generator. If the utility power is restored (above 80% of nominal) at any time from the initiation of the engine start until the generator is ready to accept load (5 sec- ond warm-up time has not elapsed), the controller will complete the start cycle and run the generator through its normal cool down cycle; however, the load will remain on the utility source.
  8. 3.3.2 CRANKING The system will control the cyclic cranking as follows: 16 second crank, seven (7) second rest, 16 second crank, seven (7) second rest followed by three (3) additional cycles of seven (7) second cranks followed by seven (7) second rests. Choke Operation
  9. 1. The 990/999cc engines have an electric choke in the air box that is automatically controlled by the electronic control board.
  10. 2. The 530cc engines have an electric choke on the divider panel air inlet hose that is automatically controlled by the electronic control board.

Source: manual:9f84685f-0bec-42e0-a4e9-5c2c50b4b67b.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.