Problem 12 - Blown F1 Or F2 Fuse; Problem 13 - Blown T1 Fuse; Problem 14 - Unit Starts And Transfer Occurs When Utility Power Is On - Generac Power Systems CorePower Repair Manual

Section 3.3
Troubleshooting Flowcharts
TEST 32 – CHECK
FUSE F1 & F2
GOOD
FINISH
TEST 35 – CHECK
FUSE F3 (T1)
GOOD
STOP TESTING
Problem 14 – Unit Starts and Transfer Occurs When Utility Power Is On
TEST 38 –
CHECK N1 & N2
VOLTAGE
BAD
TEST 39 – CHECK
UTILITY SENSE
VOLTAGE
GOOD
REPAIR N1/N2 OPEN WIRING
BETWEEN TRANSFER
SWITCH AND GENERATOR
Page 42
Problem 12 – Blown F1 or F2 Fuse
TEST 33 – CHECK
BAD
N1 & N2 WIRING
REPAIR OR REPLACE
Problem 13 – Blown T1 Fuse
TEST 36 – CHECK
BAD
T1 WIRING
REPAIR OR REPLACE
GOOD
TEST 32 –
BAD
CHECK FUSE
F1 & F2
BAD
REPLACE
GO TO PROBLEM 7
GOOD
BAD
WIRING
GOOD
BAD
WIRING
TEST 41 – CHECK
UTILITY SENSING
VOLTAGE AT
CONTROLLER
BAD
GOOD
CHECK N1 AND
N2 VOLTAGE
REPAIR OR REPLACE WIRE
N1A/N2A BETWEEN N1/N2
LUGS AND FUSE HOLDER
PART 3
TRANSFER SWITCH
INSPECT/REPLACE
CONTROLLER
REPLACE CONTROLLER
REPLACE
GOOD
CONTROLLER
REPAIR OR
REPLACE
WIRING
TEST 38 –
BAD
GOOD
CORRECT
UTILITY
SOURCE
VOLTAGE