Friedrich SH20L50-A Manual De Usuario

10

All inoperative compressors returned to Friedrich 
must have all lines properly plugged with the 
plugs from the replacement compressor.

1.  The refrigerant charge is extremely critical.  Measure 

the charge carefully and as exactly as possible to 
the nameplate charge.

2.  The correct method for charging the rotary is to 

introduce liquid refrigerant into the high side of the 
system with the unit off.  Then start the compressor 
and enter the balance of the charge, gas only, into 
the low side.

 

The introduction of liquid into the low side, without 
the use of a capillary tube, will cause damage to 
the discharge valve of the rotary compressor.

Basically, troubleshooting and servicing rotary com-
pressors is the same as on the reciprocating compres-
sor with only a few exceptions.

1.  Because of the spinning motion of the rotary, the 

mounts are critical.  If vibration is present, check 
the mounts carefully.

2.  The electrical terminals on the rotary are in a 

different order than the reciprocating compressors.  
The terminal markings are on the cover gasket.  
Use your wiring diagram to insure the correct 
connections.