Maytag Ice2O MFI2665XEM Owner's Manual download pdf (Page 6)

Component Testing

WARNING

To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test

procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.

Ensure all ground wires are connected before certifying unit as repaired and/or operational.

6 16026312

Component Description Test Procedures

Capacitor

Run capacitor connects to relay

terminal

3 and L side of line.

Some compressors do not require a run

capacitor; refer to the Technical Data

Sheet for the unit being serviced.

1. Disconnect power to refrigerator.

2. Remove capacitor cover and disconnect capacitor wires.

3. Discharge capacitor by shorting across terminals w

ith a resistor for 1 minute.

4. Check resistance across capacitor terminals w

ith ohmmeter set on “X1K”

scale.

• Good—needle sw

ings to 0 ohms and slowly moves back to infinity.

• Open—needle does not move. Replace capacitor.

• Shorted—needle moves to zero and stay

s. Replace capacitor.

• High resistance leak—needle jumps tow

ard 0 and then moves back to

constant high resistance (not infinity).

Condenser Condenser is a tube and wire

construction located in machine

compartment.

Condenser is on high pressure discharge

side of compressor. Condenser function

is to transfer heat absorbed by

refrigerant

to ambient.

Higher pressure gas is routed to

condenser w

here, as gas temperature is

reduced, gas condenses into a high

pressure liquid state. Heat transfer takes

place because discharged gas is at a

higher temperature than air that is

passing over condenser. It is very

important that adequate air flow over

condenser is maintained.

Condenser is air cooled by

condenser fan

motor. If efficiency of heat transfer from

condenser to surrounding air is impaired,

condensing temperature becomes higher.

High liquid temperature means liquid will

not remove as much heat during boiling

in evaporator as under normal conditions.

This would be indicated by higher than

normal head pressures, long run time,

and high wattage. Remove any lint or

other accumulation, that would restrict

normal air movement through condenser.

From condenser the refrigerant flows into

a post condenser loop w

hich helps

control exterior condensation on flange,

center mullion, and around freezer door.

Refrigerant flows through the drier to

evaporator and into compressor through

suction line.

Leaks in condenser can usually be detected by

using an electronic leak detector

or soap solution. Look for signs of compressor oil when checking for leaks. A

certain amount of compressor oil is circulated with refrigerant.

Leaks in post condenser loop are rare because loop is a one-piece copper tube.

For minute leaks

1. Separate condenser from rest of refrigeration system and pressurize

condenser up to a maximum of 235 PSI w

ith a refrigerant and dry nitrogen

combination.

2. Recheck for leaks.

WARNING

To avoid electrical shock which can cause severe personal injury

or death,

discharge capacitor through a resistor before handling.

WARNING

To avoid severe personal injury or death from sudden eruption of high

pressures gases, observe the following:

Protect against a sudden eruption if high pressures are required for leak

checking.

Do not use high pressure compressed gases in refrigeration systems

ithout a reliable pressure regulator and pressure relief valve in the

lines.

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Maytag Ice2O MFI2665XEM Owner's Manual Page 6

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