Friedrich R-410A Control Panel Battery Change Procedure, Battery type Lithium, 3 Volts, #CR2450

Page 54

ROUTINE MAINTENANCE (Continued)

After Maintenance/Repair Start-up Checklist and Notes

‹Inspect and ensure that all components and accessories have been installed properly and that they have not been damaged during the installation progress.

‹Check the condensate water drain(s) to ensure that they are adequate for the removal of condensate water, and that they meet the approval of the end user.

‹Ensure that all installation instructions concerning clearances around the unit have been adhered to. Check to ensure that the unit air filter, indoor coil, and outdoor coil are free from any obstructions.

‹Ensure that the circuit breaker(s) or fuse(s) and supply circuit wire size have been sized correctly. If the unit was supplied with a power supply cord, insure that it is stored properly.

‹Ensure that the entire installation is in compliance with all applicable national and local codes and ordinances having jurisdiction.

‹Secure components and accessories, such as a decorative front cover.

‹Start the unit and check for proper operation of all components in each mode of operation.

‹Instruct the owner or operator of the units operation, and the manufacturer's Routine Maintenance.

NOTE: A log for recording the dates of maintenance and/or service is recommended.

‹Present the owner or operator of the equipment with the name, address and telephone number of the Authorized Friedrich Warranty Service Company in the area for future reference if necessary.

NOTE: This is a warm weather appliance

The air conditioner is designed to cool in warm weather when the outside temperature is above 60° F (15.6° C) and below 115° F (46.1° C), so it won't cool a room if it is already cool outside. If you want to cool a room in the spring or fall, select the FAN ONLY mode and set the Fresh Air/Exhaust air control to Fresh Air. This will bring in a supply of cooler outside air.

Condensation is normal

Air conditioners actually pump the heat and humidity from your room to the outside. Humidity becomes water, and your air conditioner will use most of the water to keep the outside coil cool. If there is excessive humidity, there may be excess water that will drip outside. This is normal operation.

Frosting

This usually occurs because of insufficient airflow across the coils, a dirty filter, cool damp weather, or all of these. Set the SYSTEM mode to FAN ONLY and the frost will disappear. Setting the thermostat a little warmer will probably prevent the frosting from recurring.

Noises

All air conditioners make some noise. Friedrich units are designed to operate as quietly as possible. An air conditioner mounted in a wall is quieter than one mounted in a window. It is important to ensure that the chassis seal gasket is properly installed (refer to installation instructions).

Heat pumps operate differently

If your unit is a "Y", or heat pump model, there are some things that you will want to be aware of. Some functions of a heat pump differ from your unit when it is used for heating:

1.It is normal for ice to form on the outdoor coil of the heat pump. Moisture in the outside air, passing over the coil when very cold, will form ice.

2.If the outdoor temperature drops below 37° F (3° C), your heat pump will automatically turn on the electric resistance heat. When the temperature rises to 40° F (4° C), the compressor will resume the heat pump operation. If your unit is a 115 volt model (YS10), it is designed for use in warmer climates and does not have an electrical heat feature, and will not provide adequate heat below 37° F (2.8° C).

CONTROL PANEL BATTERY CHANGE PROCEDURE

Remove the grille, by loosening four (4) captive screws (See Figure 1). Remove one (1) screw on the battery retaining door (See Figure 2). Remove and replace the battery (CR2450). Reinstall the battery retaining door. Align the grille guide pins then tighten the four (4) captive screws. Before closing the grille panel door, check the filter. Clean or replace it as necessary.

Figure 1

USE HAND TOOLS

DO NOT OVER TIGHTEN

1.USE HAND TOOLS WHEN INSTALLING AND REMOVING FRONT PANEL.

DO NOT OVERTIGHTEN SCREWS.

2. DISCONNECT POWER AND FOLLOW ALL LABELED WARNINGS WHEN FRONT PANEL IS REMOVED.

Figure

Figure 2

Battery type: Lithium, 3 Volts, #CR2450

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Contents Heat Pump with Electric Heat Cool OnlyCool with Electric Heat Heat Pump Volt YS10M10Table Of Contents Important Safety Information Your safety and the safety of others are very importantRefrigeration System Repair Hazards Property Damage Hazards Introduction Model and Serial Number LocationUnit Identification Specifications Performance DataInstallation Information / Sleeve Dimensions Electrical Data Electric Shock HazardFire Hazard Make sure the wiring is adequate for your unit Control Panel Operation Special Functions System Exit Back FAN Mode Speed Display Schedule Enter Digital Control Panels Access Codes Summary Key Sequence ActionRemote Control Operation Remote Control Operation Electronic Control System Maintenance IntroductionElectronic Control System Maintenance Operation Test mode Bypasses Following functions Can be TestedTo Clear Error Codes’ History Factory USE onlyUnit Operation Front PanelCOOL-HEAT SET Points System Set Point Mapping FigureElectronic Control Sequence of Operation Compressor OperationHeating Mode Control Operation Heat Control Heat Pump OnlyHeat Pump With Electric Heat Operation ConditionElectric Heat Operation in Cool with Electric Heat Units Compressor Lock Out Time Fan Mapping During Heat Mode Unit Operation with a WALL-STATRemoving the Front Cover Replacing the Indoor Coil Thermistor Swing OutConnecting a Remote Wall Thermostat Remote Wall Thermostat Location Capacitor Check with Capacitor Analyzer Components TestingCapacitors Capacitor ConnectionsHeating Element Heat Pump Models Testing the Heating Element Electric Shock HazardHeating Element Drain PAN ValveRefrigeration Sequence of Operation 410A Sealed System Repair Considerations Refrigeration system under high pressureEquipment Must be Capable 410A Sealed Refrigeration System RepairsEquipment Required Risk of Electric ShockMethod Of Charging / Repairs Burn HazardFreeze Hazard Undercharged Refrigerant Systems Overcharged Refrigerant SystemsRestricted Refrigerant System Check Valve Hermetic Components CheckMetering Device Capillary Tube SystemsReversing Valve DESCRIPTION/OPERATION Testing the Reversing Valve Solenoid Coil Reversing Valve in Heating ModeChecking the Reversing Valve Procedure For Changing Reversing Valve Touch Test in Heating/Cooling CycleExplosion Hazard Compressor Checks Single Phase Resistance Test Ground TestChecking Compressor Efficiency Compressor Replacement Recommended procedure for compressor replacementHigh Temperatures High Pressure Hazard Routine Maintenance Sleeve / Drain Decorative Front CoverClearances Standard Filter Cleaning Installation Instructions Control Panel Battery Change Procedure Battery type Lithium, 3 Volts, #CR2450Service and Assistance Room AIR Conditioner Unit Performance Test Data Sheet Error Codes and Alarm Status IconTroubleshooting Tips Problem Possible Cause Possible SolutionTroubleshooting Tips Cooling only Room AIR Conditioners Troubleshooting Tips Problem Possible Cause Possible SolutionReplace fuse, reset breaker. If repeats, check Possible Cause Possible Solution Problem Possible Cause Possible Solution Heat / Cool only Room AIR Conditioners Troubleshooting Tips Bad outdoor coil thermistor Replace thermistorHeat Pump Room AIR Conditioners Trouble Shooting Tips Troubleshooting Chart Heat PumpProblem Possible Cause Action Heat Pump Electrical Troubleshooting Chart Heat PumpSystem Cools When Heating is Desired YESNormal Function of Valve Malfunction of ValveElectronic Control Board Components Identification DischargeRemote Wall Thermostat Wiring Diagrams Cool W/O Electric HeatSchematic Kuhl Electronic Control Cool only ModelsSL28M30A, SL36M30A KUHL+ Electronic Control Cool with Electric Heat Models ES12M33A, ES15M33A EM18M34A, EM24M34AKUHL+ Electronic Control Cool with Electric Heat Model EL36M35AKUHL+ Electronic Control Heat Pump only Model YS10M10AHeat KUHL+ Electronic Control Heat Pump with Electric Heat Model YL24M35ATHERMISTORS’ Resistance Values This Table Applies to All ThermistorsReplacement Remote Control Configuration Instructions Checking the Remote Control’s OPT # Code Replacement Instructions Aham PUB. NO. RAC-1 Cooling Load Estimate Form Heat Gain from Quantity FactorsDAY Following is an example using the heat load form Heat Load FormHeating Load Form Friedrich Room Unit Heat Pumps Windows & Doors Area, sq. ftInfiltration Windows & Doors AVG Room AIR Conditioners Limited Warranty Technical Support Contact Information Friedrich AIR Conditioning CO
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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.
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