Cummins/Onan TGHAA — Corrective Action:

For the Cummins/Onan TGHAA.

Procedure

1. Open all shutoff valves in the fuel supply line.
2. Fill the LPG container. On cold days the LPG container may have to be kept at least half full to provide the rate of vaporization required to keep up with genset fuel demand. LPG with more than 2.5 percent butane will not vaporize below 32° F (0° C). Use HD-5 grade LPG. OVERVOLTAGE FAULT SHUTDOWN—CODE NO. 12 (The controller sensed that voltage was greater than 154 VAC for 3 seconds) Corrective Action: See the Service Manual. UNDERVOLTAGE FAULT SHUTDOWN—CODE NO. 13 (The controller sensed that voltage was less than 90 VAC for 8 seconds) Corrective Action: Turn the genset line circuit breaker OFF. If the genset runs without shutting down, run the genset with fewer connected loads. OVERFREQUENCY FAULT SHUTDOWN—CODE NO. 14 (The controller sensed that frequency was greater than 80 Hz [2400 rpm] for 0.16 second) Corrective Action: Make sure the governor rod is not hanging up on the spark plug cable (Page 8). Redistribution or publication of this document, by any means, is strictly prohibited.

Source: manual:965-0101B Onan TGHAA Genset Operator manual.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.