Friedrich 2008, 2009 service manual Heat / Cool Room AIR Conditioners Trouble Shooting Tips

Page 48

HEAT / COOL ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS

Problem

Possible Cause

Action

 

Incorrect wiring

Refer to applicable wiring diagram

 

Defective solenoid coil

Check for continuity of coil

Unit cools when

 

Block condenser coil & switch unit to cooling.

 

Allow pressure to build up in system, then

heat is called for

Reversing valve fails to shift

switch to heating. If valve fails to shift, replace

 

 

 

 

valve.

 

Inoperative system switch

Check for continuity of system switch

Problem

Possible Cause

Action

 

 

 

 

Heating capillary tube partially

Check for partially starved outer coil. Replace

 

restricted

heating capillary tube

 

 

Switch unit several times from heating to

Cooling adequate,

Check valve leaking internally

cooling. Check temperature rise across

but heating

coil. Refer to specification sheet for correct

 

insufficient

 

temperature rise

 

Reversing valve failing to shift

Deenergize solenoid coil, raise head pressure,

 

energize solenoid to break loose. If valve fails

 

completely; bypassing hot gas

 

to make complete shift, replace valve.

 

 

TROUBLESHOOTING CHART — HEATPUMP

REFRIGERANT SYSTEM DIAGNOSIS - COOLING CYCLE

LOW SUCTION PRESSURE

 

HIGH SUCTION PRESSURE

 

LOW HEAD PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH HEAD PRESSURE

Low Load Conditions

Low Air Flow Across

Indoor Coil

Refrigerant System

Restriction

Undercharged

Moisture in System

High Load Conditions

High Air Flow Across

Indoor Coil

Reversing Valve not

Fully Seated

Overcharged

Defective Compressor

Low Load Conditions

Refrigerant System

Restriction

Reversing Valve not

Fully Seated

Undercharged

in System

Defective Compressor

High Load Conditions

Low Air Flow Across

Outdoor Coil

Overcharged

Noncondensables (air)

46

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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 Testing the Electronic Control Boards for QME & XQ Models Checking Room TemperatureActivating Test Mode 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 LocationResistor Heat Anticipator See Figure Defrost Thermostat Heat Pump Models OnlyDefrost Bulb Location Heat Pump Models 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 ShockMethod Of Charging / Repairs Burn HazardFreeze 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 ValveProcedure 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 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 ActionSystem Cools When Heating is Desired Heat PumpYES 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 Cooling Load Estimate Form Heat Gain from Quantity FactorsDAY 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
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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.