Friedrich 2008, 2009 service manual Restricted Refrigerant System

Page 32

Restricted Refrigerant System

Troubleshooting a restricted refrigerant system can be difficult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions.

A partial restriction allows some of the refrigerant to circulate through the system.

With a complete restriction there is no circulation of refrigerant in the system.

Restricted refrigerant systems display the same symptoms as a “low-charge condition.”

When the unit is shut off, the gauges may equalize very slowly.

Gauges connected to a completely restricted system will run in a deep vacuum. When the unit is shut off, the gauges

will not equalize at all.

A quick check for either condition begins at the evaporator. With a partial restriction, there may be gurgling sounds

at the metering device entrance to the evaporator. The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device. Frost may continue on the suction line back to the compressor.

Often a partial restriction of any type can be found by feel, as there is a temperature difference from one side of the restriction to the other.

With a complete restriction, there will be no sound at the metering device entrance. An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation. With a complete restriction the current drawn may be considerably less than normal, as the compressor is running in a deep vacuum (no load.) Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there.

The following conditions are based primarily on a system in the cooling mode.

30

Page 31 Page 33
Image 32
Page 31 Page 33
Contents Room Air Conditioners Technical Support Contact Information Table Of Contents Important Safety Information Your safety and the safety of others are very importantRefrigeration System Hazards Property Damage Hazards Introduction Typical Unit Components1st Digit Function 2nd Digit7th Digit Options 0 = Straight Cool & Heat Pump Models 6th Digit Voltage 1 = 115 VoltsChassis Specifications for 2009, 2008 models Installation information / sleeve dimensions Performance Data for 2009, 2008 models Electric Shock Hazard Fire HazardMake sure the wiring is adequate for your unit To adjust temperature 60F 16C to 90F 32C To start unitHow to use the remote control* QuietMaster Programmable How to operate the Friedrich room air conditioner XQ models How to use the remote control XQ models How to operate the Friedrich room air conditioner Activating Test Mode Testing the Electronic Control Boards for QME & XQ ModelsChecking Room Temperature Testing the Electronic Control Error Code Listings Testing the Rotary Control Switches KS, KM, SL Models See FigureEQ08 System Control Switch Test Functional Component DefinitionsMechanical Components Electrical ComponentsComponents Testing Thermostat AdjustmentTest Thermostat Bulb LocationDefrost Bulb Location Heat Pump Models Resistor Heat Anticipator See FigureDefrost Thermostat Heat Pump Models Only Capacitors Capacitor Check with Capacitor AnalyzerCapacitor Connections FAN MotorTesting the Heating Element Electric Shock Hazard Heating Element See FigureHeating Element Heat Pump Models Drain PAN ValveOperating Sequence / Characteristics and Features Smart FANRefrigeration Sequence of Operation Sealed Refrigeration System Repairs Equipment RequiredEquipment Must be Capable Risk of Electric ShockFreeze Hazard Method Of Charging / RepairsBurn Hazard Undercharged Refrigerant Systems Overcharged Refrigerant SystemsRestricted Refrigerant System Hermetic Components Check Metering DeviceCheck Valve Capillary Tube SystemsReversing Valve DESCRIPTION/OPERATION Testing the Coil Checking the Reversing ValveExplosion Hazard Procedure For Changing Reversing ValveTouch Test in Heating/Cooling Cycle Compressor Checks Checking Compressor Efficiency Single Phase Resistance TestGround Test High Temperatures Compressor ReplacementRecommended procedure for compressor replacement Rotary Compressor Special Troubleshooting and Service Routine Maintenance Coils and Base PAN Excessive Weight HazardBlower Wheel / Housing / Condenser FAN / Shroud AIR FilterSleeve / Drain Front CoverCooling only Room AIR Conditioners Troubleshooting Tips Problem Possible Cause ActionReplace fuse, reset breaker. If repeats, check Fused separately Problem Possible Cause Action Heat / Cool only Room AIR Conditioners Troubleshooting Tips Heat / Cool Room AIR Conditioners Trouble Shooting Tips Problem Possible Cause ActionYES System Cools When Heating is DesiredHeat Pump Normal Function of Valve Malfunction of ValveElectronic Control Cool only Models Electronic Control Cool only Models Electromechanical Control Cool only Models SL28L30-D,-E SL36L30A-D,A-E Page Electromechanical Control Cool with Electric Heat Models EL36L35A-D,A-E Electromechanical Control Heat Pump only Models YS13L33-D,-E YM18L34-D,-E YL24L35-E,-F Aham PUB. NO. RAC-1 DAY Cooling Load Estimate FormHeat Gain from Quantity Factors Following is an example using the heat load form Heat Load FormWindows & Doors Area, sq. ft Infiltration Windows & Doors AVGRoom AIR Conditioners Limited Warranty Page Technical Support Contact Information Friedrich AIR Conditioning CO
Related manuals
Manual 60 pages 54.38 Kb Manual 60 pages 45.7 Kb

2009, 2008 specifications

Friedrich 2008 and 2009 represent significant advancements in heating and cooling technology, particularly in the realm of air conditioning systems. Friedrich is known for producing robust and efficient HVAC solutions tailored for both residential and commercial applications. These models are particularly noteworthy for their innovative features and energy-efficient technologies that enhance user comfort and lower operational costs.

One of the main characteristics of the Friedrich 2008 and 2009 models is their emphasis on energy efficiency. Both units are designed to meet or exceed Energy Star standards, which indicates that they use less energy compared to standard models, contributing to greener living solutions. The incorporation of efficient compressors and high SEER (Seasonal Energy Efficiency Ratio) ratings ensures that users save money on their electricity bills while enjoying optimal cooling performance.

The units also feature advanced inverter technology, which allows for variable speed operation. This means that the system can adjust its cooling capacity based on the current temperature needs, resulting in more consistent comfort while reducing wear and tear on the equipment. Additionally, the inverter technology operates more quietly compared to traditional systems, making these models suitable for both home environments and commercial settings.

Friedrich 2008 and 2009 also provide users with enhanced control options. The inclusion of smart technology and Wi-Fi connectivity allows for remote monitoring and temperature adjustments via smartphones or tablets. Users can create schedules, set temperature preferences, and receive maintenance alerts, contributing to a more user-friendly experience.

Moreover, these models are designed with robust construction, featuring durable materials that withstand various weather conditions. Their compact footprint and sleek design make them suitable for window installation, while an array of sizes accommodates spaces of different dimensions.

Additionally, the air filtration systems in Friedrich 2008 and 2009 units improve indoor air quality. They effectively capture dust, allergens, and other particulates, ensuring a healthier environment for occupants.

In summary, Friedrich 2008 and 2009 models stand out for their energy efficiency, innovative inverter technology, smart controls, and robust construction. With a focus on user comfort and environmental responsibility, these models provide reliable solutions for effective heating and cooling in diverse applications.
Top Page Image Contents