Normal operating sounds.

Newer refrigerators sound different from older refrigerators. Modern refrigerators have more features and use newer technology.

Do you hear what I hear? These sounds are normal.

 

 

 

 

HUMMM...

 

 

 

 

 

 

 

WHOOSH...

■ You may hear the fans spinning at high speeds.

 

 

 

 

 

 

 

 

 

 

■ The new high efficiency compressor may run faster

and longer than your old refrigerator and you may

This happens when the refrigerator is first plugged

hear a high-pitched hum or pulsating sound while

in, when the doors are opened frequently or when

it is operating.

a large amount of food is added to the refrigerator

■ Sometimes the refrigerator runs for an extended period,

or freezer compartments. The fans are helping to

maintain the correct temperatures.

especially when the doors are opened frequently. This

 

 

 

means that the Frost Guard™ feature is working to

■ If either door is open for over 3 minutes, you may

prevent freezer burn and improve food preservation.

hear the fans come on in order to cool the light

■ You may hear a whooshing sound when the doors close.

bulbs.

■ The fans change speeds in order to provide optimal

This is due to pressure equalizing within the refrigerator.

 

 

 

 

 

cooling and energy savings.

 

 

 

 

 

■ You may hear the fan running after selecting one

 

 

 

 

 

of the CustomCool ™ settings.

CLICKS, POPS,

WATER SOUNDS

CRACKS and CHIRPS

 

■ You may hear cracking or popping sounds when the

■ The flow of refrigerant through the freezer cooling

refrigerator is first plugged in. This happens as the

coils may make a gurgling noise like boiling water.

refrigerator cools to the correct temperature.

■ Water dropping on the defrost heater can cause a

■ Electronic dampers click open and closed to provide

sizzling, popping or buzzing sound during the

optimal cooling and energy savings.

defrost cycle.

■ The compressor may cause a clicking or chirping

■ A water dripping noise may occur during the defrost

sound when attempting to restart (this could take

cycle as ice melts from the evaporator and flows into

up to 5 minutes).

the drain pan.

■ The electronic control board may cause a clicking

■ Closing the door may cause a gurgling sound due to

sound when relays activate to control refrigerator

pressure equalization.

components.

 

■Expansion and contraction of cooling coils during and after defrost can cause a cracking or popping sound.

■ On models with an icemaker, after an icemaking

 

For additional information on normal icemaker

cycle, you may hear the ice cubes dropping into

 

and dispenser operating sounds, see the About

the ice bucket.

 

the automatic icemaker and About the ice and

 

 

water dispenser sections.

 

 

 

30

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GE 21, 23, 25, 27, 29 Normal operating sounds, You may hear the fans spinning at high speeds, Ice bucket
Page 29 Page 31

21, 23, 25, 27, 29 specifications

The GE 21, 23, 25, 27, and 29 series of locomotives represent a significant evolution in diesel-electric technology, showcasing General Electric's commitment to innovation and performance in the rail industry. These models, produced from the late 20th century to the early 21st century, are designed to meet a variety of operational needs.

The GE 21, introduced in the early 1990s, was notable for its efficiency and reliability. It utilized a 12-cylinder engine coupled with GE's innovative software systems, allowing for enhanced fuel economy and lower emissions. The locomotive's modular design enabled easy maintenance, which was a significant advantage for rail operators looking to minimize downtime.

Moving to the GE 23, this model offered increased power and improved traction systems, reflecting the industry's demand for stronger and faster trains. With an upgraded traction control system, the GE 23 provided better performance on challenging grades and under various load conditions. Its spacious cab and ergonomic controls also emphasized operator comfort and productivity.

The GE 25 built upon the successes of its predecessors, featuring advanced microprocessor controls and a more robust engine. This model was designed with higher horsepower, making it suitable for heavy freight operations. The GE 25’s aerodynamic design reduced drag, enhancing fuel efficiency during long hauls. Additionally, the locomotive included state-of-the-art diagnostic systems, allowing for real-time monitoring of performance metrics.

In the evolution of these series, the GE 27 introduced even more technological advancements, including improved lightweight materials and enhanced safety features. This model could accommodate various cargo types and was compatible with modern signaling systems, making it versatile for different rail networks. The GE 27 was designed with sustainability in mind, further reducing emissions and adhering to stricter environmental regulations.

Finally, the GE 29 series marked a major leap forward with the integration of cutting-edge digital technology. These locomotives featured predictive maintenance capabilities, allowing operators to foresee potential mechanical issues before they resulted in failures. The GE 29 series also placed a strong emphasis on energy efficiency, incorporating regenerative braking systems that harness energy during braking for reuse.

Overall, the GE 21, 23, 25, 27, and 29 locomotives reflect General Electric’s ability to innovate continually, combining power, efficiency, and advanced technology to meet the changing demands of the rail industry. Each model brought unique features and improvements, ultimately enhancing the performance and reliability of rail freight services.
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