Guardian 4389 Repair Manual page 63

"V-TYPE" PREPACKAGED
TRANSFER SWITCHES
Problem 6 - In Automatic Mode, Generator Starts When Loss of Utility Occurs,
Generator Shuts Down When Utility Returns But There Is No Retransfer To Utility Power
TEST 29 - CHECK
VOLTAGE ATUTILITY
CLOSING COIL C1 AND
LIMIT SWITCH XA1
C1 COIL VOLTAGE
SWITCH XA1
VOLTAGE GOOD
C1 COIL VOLTAGE
BAD / LIMIT
SWITCH XA1
VOLTAGE BAD
TEST 23 - TEST
TRANSFER
RELAY
GOOD
TEST 30 - CHECK
BAD
FUSE F1 & F2
GOOD
FINISH
PART 3
C1 COIL VOLTAGE
GOOD BUT NO
TRANSFER
BAD / LIMIT
GOOD
BAD
REPLACE
Problem 7 - Blown F1 or F2 Fuse
TEST 34 - CHECK
N1 & N2 WIRING
BAD
REPAIR OR REPLACE
TROUBLESHOOTING FLOW CHARTS
TEST 24 - CHECK
MANUAL TRANSFER
SWITCH OPERATION
TEST 31 -
TEST LIMIT
SWITCH XA1
TEST 32 -
CONTINUITY TEST
OF WIRING (C1)
TEST 26 - CHECK
#23 AND #194
WIRING
CONNECTIONS
TEST 35 - CHECK
GOOD
TRANSFORMER TX
BAD
REPLACE
SECTION 3.3
REPLACE
GOOD
UTILITY COIL
GOOD
REPLACE
LIMIT
BAD
SWITCH
REPAIR OR
BAD
REPLACE
GOOD
C1
REPAIR
WIRE #A
FINISH
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