Remington REM-05-240-GH Service Manual download pdf (Page 19)

CAPACITORS

ELECTRIC SHOCK HAZARD

WARNING

Turn off electric power before servicing.

Discharge capacitor with a 20,000 Ohm 2 Watt

resistor before handling.

Failure to do so may result in personal injury,

or death.

Capacitor Check with Capacitor Analyzer

The capacitor analyzer will show whether the capacitor

is “open” or “shorted.” It will tell whether the capacitor

is within its micro farads rating and it will show whether

the capacitor is operating at the proper power-factor

percentage. The instrument will automatically discharge

the capacitor when the test switch is released.

Capacitor Connections

The starting winding of a motor can be damaged by a

shorted and grounded running capacitor. This damage

usually can be avoided by proper connection of the running

capacitor terminals.

From the supply line on a typical 230 volt circuit, a 115 volt

potential exists from the “R” terminal to ground through a

possible short in the capacitor. However, from the “S” or start

terminal, a much higher potential, possibly as high as 400

volts, exists because of the counter EMF generated in the

start winding. Therefore, the possibility of capacitor failure

is much greater when the identied terminal is connected

to the “S” or start terminal. The identied terminal should

always be connected to the supply line, or “R” terminal,

never to the “S” terminal.

When connected properly, a shorted or grounded running

capacitor will result in a direct short to ground from the “R”

terminal and will blow the line fuse. The motor protector

will protect the main winding from excessive temperature.

COMPONENTS TESTING

BLOWER / FAN MOTOR TEST

BLOWER / FAN MOTOR

A single phase permanent split capacitor motor is used to drive

the evaporator blower and condenser fan. A self-resetting

overload is located inside the motor to protect against high

temperature and high amperage conditions.

ELECTRIC SHOCK HAZARD

WARNING

Disconnect power to the unit before

servicing. Failure to follow this warning

could result in serious injury or death.

1. Make sure the motor has cooled down.

2. Disconnect the fan motor wires from the control board.

3. Test for continuity between the windings also, test to

ground.

4. If any winding is open or grounded replace the motor.

Many motor capacitors are internally fused. Shorting the

terminals will blow the fuse, ruining the capacitor. A 20,000

ohm 2 watt resistor can be used to discharge capacitors

safely. Remove wires from capacitor and place resistor

across terminals. When checking a dual capacitor with

a capacitor analyzer or ohmmeter, both sides must be

tested.

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Remington REM-05-240-GH Service Manual Page 19

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