9-2-2. Outline of Main Controls

1.Pulse Modulating V alve (PMV ) control

1)For PMV with 50 to 500 pulses during operation, respectively.

2)In cooling operation, PMV is controlled with the temperature difference between TS sensor and TC sensor.

3)In heating operation, PMV is controlled with the temperature difference between TS sensor and TE sensor.

4)For the temperature difference in items 2) and 3), 1 to 5K is aimed as the target in both cooling and heating operations.

5)When the cycle excessively rose in both cooling and heating operations, PMV is controlled by TD sensor.

The aimed value is usually 103°C for SM562, SM802 and 92°C for SM1102, SM1402 in both cooling and heating operations.

REQUIREMENT

A sensor trouble may cause a liquid back-flow or abnormal overheat resulting in excessive shortening of the compressor life. In a case of trouble on the compressor, be sure to check there is no error in the resistance value an the refrigerating cycle of each sensor after repair and then start the operation.

2. Discharge temperature release control

 

1)

This function controls the operation frequency, that

TD [˚C]

 

is, lowers the operation frequency when the

 

 

discharge temperature has not lower or the

Error stop ("P03" display with 4 times of error counts)

 

discharge temperature has rapidly risen during

 

a

 

PMV control. It subdivides the frequency control

 

 

 

up to a unit of 0.6 Hz to stabilize the cycle.

Frequency down

2) When the discharge temperature is detected in an

b

 

 

abnormal stop zone, the unit stops the compres-

c

 

sor and restarts after 2 minutes 30 seconds. The

 

Frequency holding

 

error counter is cleared when it has continued the

 

 

operation for 10 minutes.

d

 

If the abnormal stop zone has been detected by 4

Frequency slow-up

 

times without clearing of counter, an error “P03” is

 

(Up to command)

 

displayed.

e

 

* The cause is considered as excessively little

As command is

 

 

 

amount of refrigerant, defective PMV, or clogging

 

 

of cycle.

 

 

 

 

 

 

[°C]

 

 

 

 

 

 

 

a

b

c

d

e

 

 

 

 

 

 

SM562, SM802

117

107

103

100

93

 

 

 

 

 

 

SM1102, SM1402

111

106

100

95

90

 

 

 

 

 

 

3.Current release control

The output frequency and the output voltage are controlled by AC current value detected by T02 on the outdoor P.C. board so that input current of the inverter does not exceed the specified value.

Current [A]

 

Frequency down

I1

Hold

 

I1–0.5

Hold

Normal operation

 

Objective model

SM562

SM802

SM1102

SM1402

 

 

 

 

 

 

 

 

COOL

HEAT

COOL

HEAT

COOL

HEAT

COOL

HEAT

 

 

 

 

 

 

 

 

 

 

I1 value [A]

10.1

12.0

12.2

14.0

18.9

19.7

19.7

19.7

 

 

 

 

 

 

 

 

 

– 75 –

Page 74 Page 76
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Image 75
Toshiba RAV-SM562UT-E, RAV-SM1102UT-E, RAV-SM1402UT-E Outline of Main Controls, Pulse Modulating V alve PMV control
Page 74 Page 76

RAV-SM562UT-E, RAV-SM802UT-E, RAV-SM1402UT-E, RAV-SM1102UT-E specifications

Toshiba has established itself as a leading name in the field of heating, ventilation, and air conditioning (HVAC) systems. Among their extensive range, the RAV-SM802UT-E, RAV-SM1102UT-E, RAV-SM1402UT-E, and RAV-SM562UT-E stand out for their performance, efficiency, and innovative technology.

The Toshiba RAV-SM802UT-E is designed for medium-sized commercial spaces, providing a cooling capacity of 8 kW. It employs advanced inverter technology, which enables it to adjust the compressor speed based on the load demand. This adaptability leads to a significant decrease in energy consumption, making the unit both eco-friendly and cost-effective. The unit also features a high-efficiency rotary compressor and a wide operating temperature range, ensuring reliable performance even in extreme weather conditions.

Next in line, the RAV-SM1102UT-E offers an impressive 11 kW cooling capacity, making it suitable for larger commercial applications. This model incorporates Toshiba’s cutting-edge Superlink technology, which allows multiple indoor units to be connected to a single outdoor unit, providing flexible installation options. The RAV-SM1102UT-E is also equipped with a sleek and modern design that blends seamlessly with any architecture while ensuring low noise levels during operation, enhancing comfort in the workspace.

The RAV-SM1402UT-E is a powerhouse among the series, boasting a cooling capacity of 14 kW. It is built with an enhanced refrigerant management system that minimizes refrigerant leaks and optimizes thermal efficiency. This model supports smart building management systems, making it an ideal choice for tech-savvy businesses looking to integrate their HVAC systems into a broader energy management framework. Furthermore, it maintains high EU energy efficiency ratings, verifying Toshiba's commitment to environmental sustainability.

Lastly, the RAV-SM562UT-E, with its 5.6 kW cooling capacity, is tailored for smaller commercial environments and residential use. It retains all the core technologies featured in its counterparts, including inverter technology and a high-efficiency compressor, ensuring comfort without excessive energy usage. This model also includes a user-friendly remote control and programmable timer functions, allowing for customized comfort settings and enhanced convenience.

In summary, the Toshiba RAV-SM series represents the pinnacle of HVAC innovation, blending energy efficiency with advanced technology. Each model caters to specific needs, from the compact RAV-SM562UT-E to the robust RAV-SM1402UT-E, ensuring that every commercial and residential space can achieve optimal climate control.
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