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INTRODUCTION TO TROUBLESHOOTING
The first step in troubleshooting is to correctly identify the problem. Once that is done, the cause of the an be
found by performing the tests in the appropriate flow chart.
Test numbers assigned in the flow charts are identical to test numbers in Section 3.4, “Diagnostic Tests.” Section
3.4 provides detailed instructions for performance of each test.
BAD
BAD
REPAIR OR REPLACE AS NEEDED
REPLACE
GOOD
GOOD
GOOD
FIND CAUSE OF NO AC OUTPUT TO
TRANSFER SWITCH FROM GENERATOR
TEST 26 – CHECK
VOLTAGE AT
TERMINAL LUGS
E1 & E2
TEST 27 – CHECK
MANUAL TRANSFER
SWITCH OPERATION
TEST 28 – CHECK #23
AND #15B WIRING
CONNECTIONS
BAD
REPAIR AS NEEDED
TEST 30 – CHECK
STANDBY CONTROL
CIRCUIT
TEST 29 – TEST
TRANSFER
RELAY
BAD
BAD
GOOD
REPAIR OR REPLACE MECHANISM
Problem 7 – In Automatic Mode, No Transfer to Standby
Page 70
PART 3
TRANSFER SWITCH
SECTION 3.3
TROUBLESHOOTING FLOW CHARTS