Generac Power Systems MC - Manual (Page 46)

DIODES D1 ANDD2
A.)- Disconnect Wire No. 78 at the
circuit breaker CB-2, Set the VOM
to '*+DC” and to ’’Rxl” scale. Zero
the meter. Connect the positive (+)
test probe to Wire No. 78 from the
Diode D-2. Connect the common (-)
test probe to frame ground. Meter
needle should not move. Set meter
to ”-DC", or reverse the meter test
probes. Meter needle should swing
upscale to some mid-scale reading
(approximately 7-12 Ohms).
RESULT:- Diode D-2 tests good...... Reconnect Wire 78,
Diode D-2 tests bad.... . .... ............
go to Paragraph B
.Replace Diode D-2
B.)- Set VOM to ”+DC” and to ”Rxl” scale, then zero the meter. Connect
the positive (+) test probe to the Diode D-1 terminal end. Connect the
common (-) test probe to frame ground. Meter needle should not move.
Set meter to ”-DC” or reverse the test probes. Meter needle should move
upscale.
RESULT:- Diode D-1 tests good.......................... Continue tests
Diode D-1 tests bad........................ ...Replace Diode D-1
STATOR BATTERY CHARGE WINDINGS
Disconnect Wire 77 from Circuit Break­
er CB-2, Unplug the red connector plug
from its receptacle on the stator can.
Set VOM to "+DC” and to ”Rxl" scale,
then zero the meter. Connect one meter
test probe to Wire 55 at the Diode D-1
terminal. Connect second test probe to
Pin 6 of the red receptacle. Meter
needle should swing upscale (approxim­
ately ,08 Ohm). Repeat test with meter
test probe connected to red receptacle
Pin 6 and Wire 77 - meter should indi­
cate approximately .08 Ohm,
.08 ohm.
.08 ohm.
To
CB-2
Pin 6
€ 0
0 0
00
RED
RECEPTACLE
To
•DIODE D-1
RESULT; Both meter readings were approximately
.08 Ohm............... ...................... ....... Test good
Meter needle did not indicate .08 Ohm.......... Replace stator
2.3-2