Maytag Ice2O MFI2665XEM Owner's Manual download pdf (Page 29)

System Diagnosis

Symptoms of Low or High Ambient

Temperature Installation

Lower ambient air temperature reduces the condensing

temperature and therefore reduces the temperature of

the liquid entering the evaporator. The increase in

refrigeration effect due to operation in a lower ambient

results in a decrease in power consumption and run

time. At lower ambients there is a reduction in cabinet

heat leak which is partially responsibile for lower power

consumption and run time.

An increase in refrigeration effect cannot be expected

below a certain minimum ambient temperature. This

temperature varies with the type and design of the

product.

Generally speaking, ambient temperatures cannot be

lower than 60° F. without affecting operating efficiency.

Conversely, the higher the ambient temperature the

higher the head pressure must be to raise the high side

refrigerant temperature above that of the condensing

medium. Therefore, head pressure will be higher as the

ambient temperature raises. Refrigerators installed in

ambient temperatures lower than 60° F. will not perform

as well because the pressures within the system are

generally reduced and unbalanced. This means that the

lower head pressure forces less liquid refrigerant

through the capillary line. The result is the symptoms of

a refrigerant shortage. The lower the ambient

temperature the more pronounced this condition

becomes.

When a point where the ambient temperature is below

the cut-in of the Temperature Control is reached, the

compressor won't run.

The drain traps will freeze in ambient temperatures of

32° F.

Heat Load

A greater heat load can result from the addition of more

than normal supply of foods, such as after doing the

weekly shopping. Other items contributing to an

additional heat load would be excessive door openings,

poor door sealing, interior light remaining on, etc.

An increase in heat being absorbed by the refrigerant in

the evaporator will affect the temperature and pressure

of the gas returning to the compressor. Compartment

temperatures, power consumption, discharge, and

suction pressures are all affected by heat load.

Pressures will be higher than normal under heavy heat

load.

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Maytag Ice2O MFI2665XEM Owner's Manual Page 29

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