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GENERATOR RUNS CONTINUOUSLY OR FAILS TO STOP AFTER RETRANSFER
Basic Theory –
Public Service power energizes ATS
ATS holds “R” terminals open
Generator test switch or exerciser can start generator, as programmed.
Public Service power drops, ATS closes “R” terminals, generator starts.
Ground fault problems in the conduit lead to the majority of continued run problems.
1. Disconnect both the “R” wires at the generator. Put generator control switch into “AUTO”.
A. Generator should start.
B. Generator should only run for 90 seconds. If so, GO TO STEP #3.
C. If the generator continues to run, allow 15 minutes.
If the generator shuts down, but not at 90 seconds, record time and contact factory.
2. Jump momentarily the “R” terminals.
A. Generator should start.
B. Generator should only run for 90 seconds. If so, GO TO STEP #3.
C. If the generator continues to run, allow 15 minutes.
If the generator shuts down, but not at 90 seconds, record time and contact factory.
3. Place generator control switch to “OFF”
A. Reconnect the “R” terminals at generator. Now, remove the ATS connections.
B. Place generator into “AUTO” setting.
C. With the “R” wires apart, the generator should not start.
If generator starts, but did not in step 1A, bad wiring exists in conduit.
D. Momentarily hold the “R” wires together. Generator should start.
E. Open connection from step “D”.
Generator should only run for 90 seconds. If so, GO TO STEP #4.
If the generator continues to run, allow 15 minutes.
If the generator shuts down, but not at 90 seconds, record time and contact factory.
4. Check ATS “R” terminals.
A. If red light (or other indicator) is on at ATS, public service power is on. Terminals
should be open.
B. Check manual controls of ATS (generator test, exerciser).
C. Replace control logic of ATS.