M4 – Switch Access (Unit Configuration)

FACTORY USE ONLY

M5 – Error Codes & History

Number of Errors

Error Code

On/Off

 

Error Code

 

Maintenance funtion 5 is ready to be selected. Press DISPLAY/ENTER to access the function.

The error code display shows the error code number on the left, and the error code

history on the right. User presses the or keys to cycle through the error codes. The current state of the error code is shown with the On/Off icon. To exit the maintenance sub-menu, press the BACK key to return to the M5 screen.

Shown on this display is error code 1 with 4 occurances. The current state is on.The error code display shows the error code number on the left, and the error code history

on the right. User presses the or keys to cycle through the error codes. The current state of the error code is shown with the On/Off icon. To exit to the maintenance sub-menu, press the BACK key to return to the M5 screen. Shown on this display is error code 6 with 3 occurances. The current state is off.

To Clear Error Codes’ History:

Hold the

or

keys simultaneously for 3 seconds. See page 56 for alarm status and error codes.

M6 – Factory Use Only

20

Page 21
Image 21
Friedrich R-410A service manual Factory USE only, To Clear Error Codes’ History

R-410A specifications

Friedrich R-410A is an advanced refrigerant widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, known for its high efficiency and environmental friendliness. As a hydrofluorocarbon (HFC) blend, R-410A has become the preferred alternative to R-22, which is being phased out due to its ozone-depleting potential. One of the main features of R-410A is its high latent heat of vaporization, which allows for efficient heat transfer and improved cooling performance in air conditioning units.

Technologically, R-410A operates at higher pressures than older refrigerants, meaning systems designed for R-410A need to be built with more robust components to safely handle these pressures. This results in a more compact system design that offers enhanced performance and reliability. The dual-component nature of R-410A—composed of difluoromethane (R-32) and pentafluoroethane (R-125)—provides an optimal balance of thermodynamic properties, leading to superior energy efficiency, especially in variable speed applications.

In terms of characteristics, R-410A has a higher cooling capacity, which enables HVAC systems to effectively cool larger spaces or run more efficiently when cooling smaller areas. The refrigerant is non-toxic and non-flammable, which enhances safety during its use. In addition, R-410A has a lower global warming potential relative to other refrigerants, making it a more environmentally responsible choice for modern cooling systems.

Moreover, R-410A systems typically require less refrigerant charge due to their efficiency, contributing to reduced greenhouse gas emissions. The adoption of R-410A aligns with regulatory trends aimed at minimizing the environmental impact of refrigerants in cooling applications.

Overall, the Friedrich R-410A refrigerant embodies a combination of technology and environmental stewardship, making it a cornerstone of contemporary HVAC design. Its ability to provide effective and energy-efficient cooling solutions while being compliant with modern environmental regulations positions R-410A as the refrigerant of choice for engineers and installers focused on sustainability and performance in air conditioning systems.