Generac Power Systems 53187 - Manual (Page 30)

SECTION 1.6- TROUBLESHOOTING
(UNITS WITH 15 INCH STATOR)
1
PART 1
THE REVOLVING FIELD AC GENERATOR
Problem 1 - Generator Produces Zero or Residual Voltage at No-Load (Continued)
BAD
i
RECONNECT, REPAIR OR
REPLACE BAD LEADS AS
NECESSARY
TEST 8- CHECK
AT/M3 r\ 1/ w
TEST 9-TEST
CCKICIAI/^ -- rsr\r\r\^
TEST 10- TEST
CTATnn An
SENSING LEADS TRANSFORMER POWER
WtNniNnft
BAD
J
REPLACE BAD
TRANSFORMER
BAD
\
REPLACE
STATOR
ASSEMBLY
BAD
I
I
I
T
BAD
I
TEST 11-TEST TEST 12- CHECK TEST 13- CHECK TEST 14- TEST
ROTOR
WINDINGS --------- O.K._^ BRUSHES AND
SLIP RINGS
«O.K.^ WIRES NO.
1 AND 4
FIELD
BOOST
REPLACE ROTOR REPLACE BRUSHES
OR CLEAN SLIP RINGS,
AS NECESSARY
RECONNECT,
REPAIR OR REPLACE
BADWIRE(S)
BAD
»
REPAIR BAD
WIRE(S) OR
REPLACE BAD
PART(S)
Problem 2- Generator Produces Low Voltage and Frequency at No-Load
(Greater than Residual Voltage)
TESTIS- CHECK BOTH TEST 16-ADJUST
VOLTAGE AND __ ARE bh ^ ENGINE
FREQUENCY LOW GOVERNOR
FREQUENCY AND
I VOLTAGE GOOD-
AFTER ADJUSTMENT
^1 STOP TESTS
FREQUENCY GOOD,
VOLTAGE IS LOW
TEST 17-CHECK
AND ADJUST
VOLTAGE
REGULATOR
LOW VOLTAGE
, AND/OR LOW FREQUENCY!
CONDITION
IS NOT CORRECTED
GOTO
PROBLEM 1
NO TE: A shorted stator w inding can cause rpm , frequency and voltage to droop excessively In the sam e
m anner as w hen the unit’s w attage/am perage capacity Is exceeded.
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