Generac Power Systems TXP - Manual (Page 40)

A.
.) Remove Control Panel top cover.
Locate the white connector plug at
the rear of the panel. Unplug the
connector from its receptacle. Set
VOM to '’+DC” and to ”Rxl" scale,
then zero the meter. Connect one
meter test probe to receptacle pin
#2. Connect the second test probe
to receptacle pin #
6
. Meter needle
should swing upscale and indicate
about 1.8 to 2.5.ohms. This is the
resistance of the stator excitation
winding..
RESULTS: 1.), Windings check Bad. .................................................................... Replace Stator
2.) Windings check Good..................................................................Continue tests in
''Diagnostic Flow Charts", Section 3
B. ) Set the. meter swLtches ..to "+DC!' and to "Rxl0,000" scale. Zero the
meter. Connect one teat, probe to white receptacle pin #2, and the other
test probe to ground. Meter needle should not move.
RESULTS: 1.) Meter needle swings upscale.................................................Replace stator
2.) Meter needle does not move.................................................. Continue tests in
"Diagnostic Flow Charts", Section 3
TEST
35
-
C A R B O N B U I L D U P
A.) Excessive carbo.n buildup in the engine combustion chamber can ser­
iously affect engine power. Carbon deposits should be removed every
500 hours of operation, or whenever the cylinder heads are removed. If
engines are run at a steady load, it may be necessary to remove carbon
more often. Refer to ENGINE REPAIR section of this Manual for cylinder
head removal and installation procedures. When reinstalling cylinder
heads, bolts must be installed in the proper location on the head and
the cylinder head must.be properly torqued.
TEST 36 -
O U T P U T V O L T A G E
A,.) Use an accurate voltmeter or
the Model 5515 Load Bank to check
output voltage. When using a volt­
meter, connect one meter test
probe to alternator output lead T1
and the remaining test probe to
2
output leads T2. Voltage should he.
approximatel.y 125 volts at "no-load",
and.115 - 125 volts AC under load.If
voltage checks good, check frequency.
TEST 34 -
EXCITATION WINDINGS
Issued 6-78 4.19