Friedrich racservmn service manual Problem Possible Cause To Correct

Page 37

PROBLEM

 

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

 

 

Dirty filter.

Clean as recommended in Owner’s Manual.

Evaporator coil

 

Restricted air flow.

Check for dirty or obstructed coil - clean as re-

 

 

quired.

freezes up.

 

Inoperative thermostat.

Test for shorted thermostat or stuck contacts.

 

 

Short of refrigerant.

De-ice coil and check for leak.

 

 

Inoperative fan motor.

Test fan motor and replace if inoperative.

 

 

Partially restricted capillary.

De-ice coil. Check temperature differential across

 

 

 

coil. Touch test coil return bends for same tempera-

 

 

 

ture. Test for low running current.

PROBLEM

 

POSSIBLE CAUSE

TO CORRECT:

 

 

 

 

 

 

Excessive heat load.

Unit undersized. Test cooling performance of unit.

Compressor runs

 

 

Replace with larger unit.

 

Restriction in line.

Check for partially iced coil. Check temperature split

continually.

 

 

 

across coil.

 

 

 

 

 

Refrigerant leak.

Check for oil at silver soldered connections. Check

Does not cycle off.

 

 

for partially iced coil. Check split across coil. Check

 

 

for low running amperage.

 

 

Thermostat contacts stuck

Check operation of thermostat. Replace if contacts

 

 

 

remain closed.

 

 

Thermostat incorrectly wired.

Refer to appropriate wiring diagram.

 

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT:

 

 

 

 

Thermostat contacts stuck.

Replace thermostat.

Thermostat does not

Thermostat set at coldest point.

Turn to higher temperature setting to see if the unit

turn unit off.

 

cycles off.

 

Incorrect wiring.

Refer to appropriate wiring diagram.

 

Unit undersized for area to be cooled.

Refer to Sizing Chart.

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

 

 

Overload inoperative. Opens too soon.

Check operation of unit. Replace overload if

 

 

system operation is satisfactory.

 

Compressor attempts to start before

Allow a minimum of two (2) minutes for pressures

 

system pressures are equalized.

to equalize before attempting to restart. Instruct

 

 

customer of waiting period.

Compressor attempts

Low or fluctuating voltage.

Check voltage with unit operating. Check for other

 

appliances on circuit. Air conditioner should be on

to start, or runs for

 

separate circuit for proper voltage, and be fused

short periods only.

 

separately.

Cycles on overload.

Incorrect wiring.

Refer to appropriate wiring diagram.

 

 

Shorted or incorrect capacitor.

Check by substituting a known good capacitor of

 

 

correct rating.

 

Restricted or low air flow through

Check for proper fan speed or blocked condenser.

 

condenser coil.

Check for kinked discharge line or restricted condenser.

 

Compressor running abnormally hot.

Check amperage.

 

 

 

 

PROBLEM

POSSIBLE CAUSE

TO CORRECT

 

 

 

Thermostat does not

Loss of charge in thermostat bulb.

Place jumper across thermostat terminals to check

 

if unit operates. If unit operates, replace thermostat.

turn unit on.

 

 

 

 

 

 

Loose or broken parts in thermostat.

Check as above.

 

Incorrect wiring.

Refer to appropriate wiring diagram.

 

 

 

37

Page 36 Page 38
Image 37
Page 36 Page 38
Contents 2003 Table of Contents RAC Serial Number Identification Guide 1st Digit Function00001 Page Data Evaporator AIR Operating Electrical Breaker Pressures Ratings Refrig Fuse Performance Evaporator AIR Operating Electrical Breaker Data SS10J10AR-A TEMP. DEG. F Pressures Ratings SC06H10E HeatingBtuh WY09A33F-A WY12A33F-A HeatingAmps Refrigeration System Sequence of Operation Fuse/Circuit Wire SizeBreaker GroundingWinding Test Thermal Overload ExternalChecking Compressor Efficiency Terminal Overload Internal Terminal Overload TestChecking the Internal Overload FAN MotorResistor System Control Panel System Control Panel KQ Models Only- See FigureEQ Model Only See Figure System Control Panel YQ Model Only System Control Switch Test System Control Switch WE & WY Models See FigureSystem Control Panel See Figure System Control Switch KS, SS, KM, SM, SL Models See FigureHeat Pump & Electric Heat Models See Figure System Control SwitchTo Adjust Temperature To SET Mode of OperationTo Adjust FAN Speed Smart Center Electronic Control CenterTesting the Electronic Control To SET the TimerTesting the Electronic Control Error Code Listings To SET Hour ClockThermostat SQ & KQ Models See Figure TestThermostat YQ Model Only See Figure Thermostat Models ES, YS, EM, YM, EL, YL See FigureDefrost Thermostat Heat Pump Models Only Thermostat AdjustmentThermostat Bulb Location CAPACITOR, RUN See Figure Defrost Bulb Location Heat Pump Models OnlyCapacitor Test Heat Pumps Reversing Valve See Figure Check Valve OperationSolenoid Coil Heat Pump Models Only See Figure Testing Reversing ValveTo Test Heating Element See Figure VALVE, Drain PAN See FigureSealed Refrigeration System Repairs Equipment RequiredSpecial Procedure in the Case Compressor Motor Burnout Hermetic Component ReplacementRotary Compressor Special Troubleshooting and Service Equipment Must be CapableMethod of Charging Undercharged Refrigerant SystemsOvercharged Refrigerant Systems Restricted Refrigerant System Routine Maintenance Troubleshooting Touch Test Chart To Service Reversing Valves Problem To Correct Troubleshooting CoolingProblem Possible Cause To Correct Cycles Problem Possible Cause To Correct Troubleshooting Heating Heat pumps Problem Possible Cause To Correct Off and the electric element is energized Troubleshooting Heating Cooling/Electric Models Troubleshooting Chart Cooling YES System Cools When Heating is DesiredModels SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A Models KQ08J10B-1, KQ08J10B-A, KQ08J10C-A Schematic YQ06J10B-A ModelModel SC06H10D 619-405-06 Alternate SL28J30B-A, SL35J30-A, SL35J30-BConductor Or Brown RED Blue To Capacitor Bracket Wiring Diagram YS12J33-A, YM18J34B-A, YL24J35C-A Model EQ08J11-A, EQ08J11-B IDT Ovld Neutral WE09A33E-B, WE12A33E-A, WE15A33-A WY09A33F-A, WY12A33G-A Checking Room Temperature Testing The Electronic Control XQ Boards & QME BoardsFriedrich AIR Conditioning CO

racservmn specifications

Friedrich Racervmn is an innovative name in the realm of precision engineering, making significant strides in the development of advanced technologies for various industries. This company stands out due to its commitment to creating high-quality, reliable, and efficient products that cater to the diverse needs of its clientele.

One of the main features of Friedrich Racervmn is its focus on research and development. The company invests heavily in R&D to push the boundaries of what is technically possible. This dedication results in the continuous improvement of their product line and the introduction of cutting-edge solutions that leverage the latest advancements in technology.

Among the distinctive technologies used by Friedrich Racervmn is their proprietary manufacturing process, which integrates automation and robotics to enhance efficiency and precision. This not only speeds up production times but also ensures that the products maintain a consistently high quality. The use of Computer Numerical Control (CNC) machines in their processes allows for intricate designs and complex geometries that meet rigorous industry standards.

Moreover, Friedrich Racervmn utilizes innovative materials in their products to ensure durability and performance under various conditions. These materials are selected based on their specific properties, such as strength, weight, and resistance to environmental factors, ensuring that the final output exceeds customer expectations.

Another hallmark of Friedrich Racervmn is their commitment to sustainability. The company actively seeks ways to minimize its environmental footprint by optimizing resource use and incorporating eco-friendly practices throughout its manufacturing processes. This is reflected in their efforts to design products that are not only high-performing but also energy-efficient, helping customers reduce their carbon emissions.

Friedrich Racervmn’s customer service stands out as well. Their team is dedicated to providing exceptional support, ensuring that clients receive personalized attention and solutions tailored to their unique needs. This customer-centric approach is a fundamental part of their philosophy and has contributed to building strong and lasting relationships within the industry.

In summary, Friedrich Racervmn is a leader in precision engineering, recognized for its advanced technologies, innovative manufacturing processes, commitment to sustainability, and outstanding customer service. The company’s focus on quality and innovation positions it as a vital player in the modern industrial landscape, continuously pushing the envelope toward a more technologically advanced and environmentally conscious future.
Top Page Image Contents