Cummins/Onan ATUC A 800 - 4X / 111 — Transfer-Retransfer Time Delay Adjustment (Spec C)
Adjustments · Transfer-retransfer time delay module
For the Cummins/Onan ATUC A 800 - 4X / 111, from the Cummins/Onan service manual.
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Procedure
- Open cabinet door to automatic transfer switch.
- Move the selector switch to WITH LOAD.
- Move test transfer switch to TEST; the generator set will start and run.
- Measure the time that the red transfer LED (module 8) remains lit.
- Insert a small screwdriver through the TRANSFER opening in the front panel; turn clockwise to increase, counterclockwise to decrease.
- Move the test transfer switch to NORMAL.
- Count the number of flashes the green LED makes in 60 seconds.
- Insert a small screwdriver through the RETRANSFER opening; turn clockwise to increase, counterclockwise to decrease.
- Repeat steps 3 through 8 until the desired time delays are obtained.
- Move the selector switch to WITH LOAD if you want the generator set to assume load during exercise or tests.
- Close cabinet door.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Pulses/60 sec to time delay (min): 50=5, 25=10, 17=15, 13=20, 10=25, 8=30
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.