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Home›Repair guides›3. Check cranking limiter. If tripped, push reset button after waiting one minute. Before

Cummins/Onan — 3. Check cranking limiter. If tripped, push reset button after waiting one minute. Before

For these Cummins/Onan models: 15.0 HA - 21 - a, 7.5 HA - 21 - a.

Applies to: Cummins Onan 15 0 Ha 21 A, Cummins Onan 7 5 Ha 21 A

Procedure

  1. 4. Check fuse on load sensor printed circuit board and replace if open. Before restarting, make sure incoming wires from generator aren’t connected to the load side of the contactor.
  2. 5. Check 3-ampere fuse from terminal 2. Fuse blows if B+ generator set lead touches terminal 2 while auto-manual switch is in “AUTO” position. Remedy and replace fuse.

Source: manual:907-0500 Onan HA Auto Demand Control Service Manual (06-1984).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.