Overcurrent protection control

(1)If the overcurrent protection circuit detects abnormal current, the compressor is stopped. (Error count = 1.) The compressor then restarts after 3 minutes.

(2)If compressor start/stop is repeated 4 times (error count = 4), alarm "P26", "P29" or "H01" (count = 2 in this case only) occurs. Operation stops and does not restart.

Current release value shift control

(1)This control is intended to improve compressor reliability by preventing continuous high-frequency operation under overload conditions when the outdoor air temperature is high, and by preventing intermittent operation through "control for prevention of high cooling loads".

(2)The control value for "current release control" is corrected according to the outdoor air temperature (TO).

Depending on the temperature, the control value is lowered to 50 – 90% for cooling operation, and to 60 – 98% for heating operation.

Freeze prevention (low-temperature release) control

The below control is performed during cooling operation (including dehumidifying operation), using whichever of the indoor heat exchanger temperatures (E1 or E2) is lower. (See the figure below.)

(1)If a temperature in the "J" area (operating frequency reduction and thermostat OFF area) is detected for 6 minutes, the compressor operating frequency is reduced. The compressor operating frequency is reduced every 30 seconds as long as the temperature remains within this area.

(2)If the temperature is in the "K" area (operating frequency increase-prohibit area), the compressor operating frequency is maintained.

(3)If the temperature is in the "H" area (operating frequency control area), and the outdoor air temperature is less than 90°F, the compressor maximum operating frequency is limited according to the indoor unit fan speed.

(4)If the temperature is in the "I" area (normal operating area), the compressors operate normally.

(5)If the temperature is continuously in the "J" area and the compressor operating frequency reaches 0, then temperature A (temperature for changing from "J" area to "H" area) is raised from 41°F to 46°F, and operation continues with the thermostat OFF until the temperature reaches the "H" area.

2. Processes and functions

Heating high-load control

The below control is performed during heating operation, based on the indoor heat exchanger temperature MAX (E1,E2).

(1)If the temperature is in the "M" area (operating frequency reduction and thermostat OFF area), the compressor operating frequency is reduced.

The compressor operating frequency is reduced every 30 seconds as long as the temperature remains within this area.

(2)If the temperature is continuously in the "M" area, the thermostat turns OFF.

(3)If the temperature is in the "N" area, operating frequency increases are prohibited.

(4)If the temperature is in the "L" area, the operating frequency is raised to the original frequency (the frequency prior to frequency reduction) by 6 Hz every 60 seconds.

(36, 48 types)

2

*When the compressor turns ON and the E2 temperature rises, the temperature at which the "M" area is first entered is 124°F (36, 42 types) or higher than 129°F (26 type).

If the E1, E2 temperature subsequently falls to the "L" area, the temperature for entering the "M" area is raised to 126°F (36, 42 types) or 133°F (26 type).

However if the E1, E2 temperature falls to the "L" area and falls below 86°F, then the temperature for entering the "M" area is changed back to 124°F (36, 42 types) or 129°F (26 type).

36

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Panasonic R410A Overcurrent protection control, Current release value shift control, Heating high-load control
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R410A specifications

Panasonic R410A is a refrigerant that has gained significant popularity in the air conditioning and refrigeration industry due to its favorable environmental properties and performance characteristics. Specifically designed to replace the harmful R22 refrigerant, which is being phased out due to its ozone-depleting potential, R410A offers a more eco-friendly alternative without compromising on efficiency or power.

One of the main features of R410A is its high energy efficiency. It operates at a higher pressure than R22, resulting in better heat transfer capabilities. This increased efficiency translates to lower energy consumption, making units using R410A more cost-effective in the long run. Additionally, R410A is known for its ability to provide excellent cooling performance even in high-temperature environments, making it suitable for a variety of applications, from residential air conditioning systems to commercial refrigeration units.

In terms of composition, R410A is a blend of two hydrofluorocarbons (HFCs), namely R32 and R125. This combination not only minimizes ozone depletion potential (ODP) but also reduces global warming potential (GWP) compared to older refrigerants. Panasonic has emphasized the importance of innovative technologies in its products, and R410A aligns perfectly with the company's commitment to developing sustainable solutions.

Panasonic also integrates advanced technologies to optimize the performance of R410A systems. For example, variable speed compressors, known as inverter technology, enhance system efficiency by adjusting the compressor's speed according to the cooling demand. This ensures that energy is only consumed when needed, further reducing operational costs.

Furthermore, R410A has a wide range of applications, including air conditioning systems, heat pumps, and chillers. Its versatility makes it a popular choice among manufacturers and consumers alike. The refrigerant is also compatible with existing R22 equipment, although specific retrofit procedures must be followed to ensure peak performance and reliability.

In conclusion, Panasonic R410A stands out as an innovative refrigerant choice in the HVAC industry, offering a combination of energy efficiency, environmentally friendly properties, and advanced technologies. As regulatory frameworks continue to tighten on greenhouse gas emissions, R410A and similar refrigerants are expected to play a crucial role in shaping a more sustainable future for air conditioning and refrigeration. Its high performance and lower environmental impact solidify its position as a leading refrigerant in contemporary cooling solutions.
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