Initial processing | Mitsubishi Electronics P500YMF-C, PURY-P400

5CONTROL

[1]Control of Outdoor Unit [1]- 1 PURY-P400·500 YMF-C

(1)Initial processing

•When turning on power source, initial processing of microcomputer is given top priority.

•During initial processing, control processing corresponding to operation signal is suspended. The control processing is resumed after initial processing is completed. (Initial processing: Data processing in microcomputer and initial setting of each LEV opening, requiring approx. 3 minutes at the maximum.)

(2)Control at staring

•For 3 minutes after starting, 60 Hz is the upper frequency limit. (When only No. 1 compressor is operating.)

•75 Hz is the upper limit within 2 hours after the power supply has been turned ON and for the 30 minutes after the compressor has started operation.

•Normal control is performed after the initial start mode (described later) has been completed.

(3)Compressor capacity control

•Variable capacitor compressor is performed by the variable capacity compressor (No. 1: inverter motor) and

constant capacity compressor (No. 2: It has capacity control switching).

•In response to the required performance, the number of compressors operating, the switching of capacity control

and the frequency of the variable capacitor compressor is controlled so that the evaporation temperature is between – 2 and – 6° C in cooling mode and that the condensation temperature is 49° C in heating mode.

•The fluctuation of the frequency of the variable capacitor compressor is as follows. It is performed at 2 Hz per

second.

20 to 100 Hz (TH6 > 20° C and in cooling mode, or in heating mode) 30 to 100 Hz (TH6 < 20° C and in cooling mode)

1)No. 2 compressor operation, stopping and full-load/un-load switching

1 Switching from stopping to operation of No. 2 compressor.

When the required performance cannot be obtained by only No. 1 compressor, the No. 2 compressor will be started. (The No. 2 compressor will be started in un-load operation.)

• After the No. 1 compressor has reached 100 Hz, the No. 2 compressor stops → un-load or un-load → full-load.

2Switching from operation to stopping of No. 2 compressor.

When the required performance is exceeded when the two compressors, No. 1 and No. 2, are operating, the No. 2 compressor is stopped or performed in un-load operation.

3Switching from un-load to full-load of No. 2 compressor

When the required performance cannot be obtained by the No. 1 compressor and the No. 2 compressor operat- ing in un-load, the No. 2 compressor will be switched to full-load operation.

4Switching from full-load to un-load of No. 2 compressor

When the required performance is exceeded when the two compressors, No.1 and No. 2 operating in full-load, the No 2 compressor will be switched to un-load operation.

2)Pressure control

The upper limit value for the high pressure (Pd) has been set for each frequency. When this value is exceeded, the frequency is reduced every 30 seconds.

3)Discharge temperature control

The discharge temperature of the compressor (Td) is monitored during the operation. If the upper limit is exceeded, the frequency is reduced by 5 Hz.

•Control is performed every 30 seconds after 30 seconds at the compressor starting.

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PURY-P400, P500YMF-C specifications

Mitsubishi Electronics has long been a leader in the HVAC industry, known for its innovative technology and reliable performance. Among its notable offerings are the P500YMF-C and PURY-P400 models, designed to address the diverse needs of commercial and residential applications.

The Mitsubishi P500YMF-C is a high-performance outdoor unit that showcases energy efficiency and advanced refrigerant technology. It employs a sophisticated inverter-driven compressor, which optimizes energy usage by adjusting its speed based on the specific heating and cooling demands of the environment. This flexibility helps to minimize energy consumption while ensuring optimal comfort.

One of the standout features of the P500YMF-C is its ability to provide consistent heating and cooling even in extreme outdoor temperatures. The unit can operate effectively in low-temperature conditions, making it ideal for regions with harsh winters. Furthermore, the system is designed with a robust build, ensuring durability and longevity.

On the other hand, the PURY-P400 is an indoor multi-split system that complements the outdoor unit perfectly. It's designed for versatility and efficiency, capable of accommodating multiple indoor units connected to a single outdoor unit. This feature is particularly beneficial for larger spaces or buildings where different zones require individual climate control.

The PURY-P400 incorporates Mitsubishi's advanced filtration technology, which significantly improves indoor air quality. It features a multi-layer filtration system that effectively removes dust, allergens, and other particulates from the air, ensuring a healthier environment for occupants.

Both systems utilize R-32 refrigerant, which has a lower global warming potential compared to traditional refrigerants. This not only makes them more eco-friendly but also complies with emerging environmental regulations. The ease of installation and operation of these units is another noteworthy characteristic, with intuitive controls and user-friendly interfaces that facilitate seamless integration into existing systems.

In summary, the Mitsubishi P500YMF-C and PURY-P400 represent a fusion of technology, efficiency, and user-centric design. With a range of features aimed at enhancing performance and environmental sustainability, these models are an excellent choice for anyone looking to invest in a reliable and efficient HVAC system. Whether for residential or commercial use, Mitsubishi’s offerings continue to set the standard in comfort and efficiency.

Mitsubishi Electronics P500YMF-C specifications Control of Outdoor Unit 1- 1 PURY-P400·500 YMF-C

Models: PURY-P400 P500YMF-C