Friedrich SQ08N10 Manual De Usuario

Recommended procedure for compressor  

replacement

1.  Be certain to perform all necessary electrical and 

refrigeration tests to be sure the compressor is 
actually defective before replacing. 

2.  Recover all refrigerant from the system though 

the process tubes. PROPER HANDLING OF 
RECOVERED REFRIGERANT ACCORDING TO 
EPA REGULATIONS IS REQUIRED.  Do not use 
gauge manifold for this purpose if there has been 
a burnout. You will contaminate your manifold and 
hoses. Use a Schrader valve adapter and copper 
tubing for burnout failures.

3.   After all refrigerant has been recovered, disconnect  

suction and discharge lines from the compressor and  
remove compressor. Be certain to have both suction  
and discharge process tubes open to atmosphere. 

4.     Carefully pour a small amount of oil from the suction  

stub of the defective compressor into a clean container.  

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should be evacuated through both liquid line and suction 
line gauge ports. While the unit is being evacuated, seal 
all openings on the defective compressor. Compressor 
manufacturers will void warranties on units received not 
properly sealed. Do not distort the manufacturers tube 
connections.   

10.  Recharge the system with the correct amount of 

 refrigerant. The proper refrigerant charge will be 
   found on the unit rating plate. The use of an accurate

         measuring device, such as a charging cylinder,
         electronic scales or similar device is necessary.
 

COMPRESSOR REPLACEMENT

5.     Using an acid test kit (one shot or conventional kit), test  

the oil for acid content according to the instructions 

 

with the kit. 

6.   If any evidence of a burnout is found, no matter how  

slight, the system will need to be cleaned up following  
proper procedures. 

7.    Install the replacement compressor. 

8.  Pressurize with a combination of R410-A and nitrogen  
   and leak test all connections with an electronic or 

 

   Halide leak detector. Recover refrigerant and repair 
      any leaks found. 
 
Repeat Step 8 to insure no more leaks are present.

Unplug and/or disconnect all electrical power 
to the unit before performing inspections, 
maintenances or service.  
 
Failure to do so could result in electric shock, 
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Sealed Refrigeration System contains refrigerant 
and oil under high pressure.

Proper safety procedures must be followed, 
and proper protective clothing must be worn 
when working with refrigerants.

Failure to follow these procedures could 

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procedures must be followed when testing, 
troubleshooting, handling or working around 
unit while in operation with high temperature 
components. Wear protective safety aids 
such as: gloves, clothing etc. 

Failure to do so could result in serious burn 

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The use of a torch requires extreme care and proper 

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this notice could result in moderate to serious property 
damage.

The use of nitrogen requires a pressure
regulator. Follow all safety procedures and 
wear protective safety clothing etc. 

Failure to follow proper safety procedures 

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Proper safety procedures must be followed, 
and proper protective clothing must be worn 
when working with liquid refrigerant.

Failure to follow these procedures could 

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