8-2. Protective Functions

Freeze prevention

During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below.

1.Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 43°F(6°C).

2.Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 46°F(8°C) or above.

exchanger

46

 

 

 

C

(8)

 

 

 

 

°F(°C)

 

A

B

 

43

 

 

temperature

 

 

(6)

 

 

 

 

heat

36

 

 

 

 

Indoor

*

 

 

 

(2)

 

 

 

 

 

 

 

 

 

 

a

b

c

d

a.Area: Automatic capacity control

b.When the temperature drops below Point A, the operation frequency is reduced by a certain proportion.

c.Area: Frequency increase is prohibited.

d.When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area.

*When the temperature drops to below 36°F(2°C) (continuously for 2 minutes or longer), the compressor stops. Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off.

NOTE (CLxx models only)

The Freeze Prevention Control during the Low Ambient Cooling Mode (outside air temperature:59°F(15°C) or lower) is as follows. The compressor stops when the temperature of indoor heat exchanger becomes less than 36°F(2°C).

The compressor restarts when the temperature of indoor heat exchanger becomes 46°F(8°C) or higher.

Compressor discharge temperature control

This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature.

Compressor discharge temperature °F(°C)

Approx.

A

 

 

214

 

 

 

(101)

 

 

 

Approx.

 

 

B

201

 

 

(94)

 

 

 

a

b

c

d

a.Area: Automatic capacity control.

b.When the temperature rises above Point A, the operation frequency is reduced at a specified rate.

c.Area: Further frequency increase is prohibited.

d.When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in a area.

*The compressor will stop if the temperature of the compressor discharge exceeds 248°F(120°C) due to shortage of gas or other reason.

CT (Peak current cut-off control)

This function prevents the circuit breaker or fuse from operating to open the circuit. This function works when electrical current has increased due to an increase in the cooling load,

or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted auto- matically to control the electrical current for operation.

When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode.

(A)

 

Cooling Dry

Peak current cut-off trips

22.5

Hz down

14.0

39

Page 39
Image 39
Sanyo C0971, C1271, CL0971, CL1271 Protective Functions, Freeze prevention, Compressor discharge temperature control

CL0971, C1271, C0971, CL1271 specifications

The Sanyo CL1271, C0971, C1271, and CL0971 are a series of advanced audio and video technologies that showcase Sanyo's commitment to innovation and quality in consumer electronics. These models exemplify solid performance and versatility, catering to a wide range of user needs.

The Sanyo CL1271 is recognized for its compact design and robust functionality. It features high-definition video output, which elevates the viewing experience with crisp images and vibrant colors. Its energy-efficient design is an asset for users who are conscious of power consumption while still seeking premium performance. The device also incorporates advanced audio technologies, ensuring that sound quality matches the high-definition visuals. The integration of built-in speakers eliminates the need for additional audio equipment, making the CL1271 a convenient choice for casual viewing.

The Sanyo C0971 stands out for its user-friendly interface and connectivity features. Equipped with multiple ports, it supports various multimedia inputs, including HDMI, USB, and VGA. This adaptability allows users to connect an array of devices, making it an excellent choice for presentations or media playback. The C0971 also employs sophisticated image processing technology, enhancing the clarity and detail of both video and images. With a focus on ease of use, its intuitive menu navigation allows even novice users to access the full range of features without difficulty.

The Sanyo C1271 builds on the foundation established by its predecessors, adding additional enhancements in terms of screen resolution and color accuracy. With a full HD display, it offers exceptional picture quality that is ideal for both entertainment and educational purposes. This model is particularly suited for professional environments, thanks to its superior performance in bright settings. The C1271's durability and reliability are other key points, making it a long-term investment for users who value quality.

Finally, the Sanyo CL0971 combines portability with powerful features, making it an ideal option for individuals on the go. Its lightweight design ensures easy transport, while the battery life enables prolonged usage without the need for frequent recharges. This model's advanced connectivity options further enhance its versatility, allowing seamless integration with smartphones and tablets.

Overall, the Sanyo CL1271, C0971, C1271, and CL0971 represent a comprehensive solution for anyone seeking high-quality audio-visual equipment. With distinct features and technologies, these models cater to a diverse range of needs, ensuring that users experience the best of what Sanyo has to offer.