GPH16M Service Manual

SERVICING
28
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
age across the start winding will energize the start relay hold-
ing coil and open the contacts to the start capacitor.
Two quick ways to test a capacitor are a resistance and a
capacitance check.
S-15A RESISTANCE CHECK
WARNING
1. Discharge capacitor and remove wire leads.
WARNING
DISCHARGE CAPACITOR THROUGH A 20 TO 30 OHM
RESISTOR BEFORE HANDLING.
Ca
p
acitor
Volt / Ohm
Meter
TESTING CAPACITOR RESISTANCE
2. Set an ohmmeter on its highest ohm scale and connect
the leads to the capacitor -
A. Good Condition - indicator swings to zero and slowly
returns to infinity. (Start capacitor with bleed resistor will
not return to infinity. It will still read the resistance of the
resistor).
B. Shorted - indicator swings to zero and stops there -
replace.
C. Open - no reading - replace. (Start capacitor would read
resistor resistance).
S-15B CAPACITANCE CHECK
WARNING
DISCHARGE CAPACITOR THROUGH A 20 TO 30 OHM
RESISTOR BEFORE HANDLING.
Using a hookup as shown below, take the amperage and volt-
age readings and use them in the formula:
Capacitance (MFD) =
2650 X Amperage
Voltage
15 AMP FUSE
Volt / Ohm
Meter
AMMETER
TESTING CAPACITANCE