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C6.1.6/0513-0515/E

Maintenance & repair

5.1 Replacing a compressor

CAUTION
Inadequate lubrication! Bearing destruction!

Exchange the accumulator

after replacing a compressor with a burned out motor. The accumulator oil
return orifice or screen may be plugged with debris or may become plugged.
This will result in starvation of oil to the new compressor and a second
failure.

In  the  case  of  a  motor  burnout,  the  majority  of  contaminated  oil  will  be  removed  with  the
compressor. The rest of the oil is cleaned through the use of suction and liquid line filter driers. A
100%  activated  alumina  suction  line  filter  drier  is  recommended  but  must  be  removed  after
72  hours.

It is highly recommended to replace the suction accumulator, if the system

contains one.

This is because the accumulator oil return orifice or screen may be plugged with

debris or may become plugged shortly after a compressor failure. This will result in starvation of
oil to the replacement compressor and a second failure. When a compressor is exchanged in the
field, it is possible that a major portion of the oil may still be in the system. While this may not
affect the reliability of the replacement compressor, the extra oil will add to rotor drag and
increase power usage.



De-energize the condensing unit before any intervention.



Close valves to isolate the unit from the system.



Recover the refrigerant from the unit and make sure that the compressor is not under
pressure.



Release the compressor mounting parts then lift it to replace with a new compressor.

NOTE:

For more detailed instructions, please refer to the compressor application

guidelines.

5.2 Condenser fins

CAUTION
Acid cleaning! Corrosion of condenser fins!

Do not use acidic solutions

to clean the coil. After cleaning, the fins should be brushed lightly with a
proper fin comb.

Condenser  fins  become  dirty  over  time  as  ambient  air  is  induced  to  the  condenser.  Dirty  coil
surfaces result in high condensing temperatures and poor unit performance. Regular cleaning is
recommended,  the  frequency  of  doing  so  being  dependent  on  the  installation  and  the
surrounding  environment.  As  a  general  guide  it  is  advisable  to  do  this  at  least  once  every  two
months.

As  a  general  rule  and  for  a  clean  environment  we  recommend  the  fins  be  cleaned  with  liquid
detergent  diluted  with  clean  water.  The  [ CF ]  EASY  condensing  unit  has  a  well-designed
chassis with falling levels towards a large drainage hole and provided the unit is installed level,
any cleaning solution should be able to drain away.  A light brush downward (in the direction of
the fins) should be done before washing to remove heavy deposits.

5.3 Electrical connections

WARNING
Isolating switch "On"! Danger of electric shock!

Turn off the unit isolating

switch before undertaking this task!

All condensing units will generate some degree of vibration. [ CF ] EASY units are no exception.
However the vibration level from the compliant scroll technology is less severe than in units
using reciprocating compressor technology. Because of this reduced vibration, [ CF ] EASY
condensing units can be mounted on simple, less expensive rubber mounting pads.

Over time, due to temperature extremes within the unit housing, electrical terminations might
become loose. The components most likely to be affected are the main terminal strip and the
compressor contactor. It is suggested to check the main electrical terminations for tightness and

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