Testing For Refrigerant Leaks; Checking For Internal (Hot Tube) Leaks - Electrolux E23CS75DSS0 Service Manual

2008 electrolux side-by-side refrigerator service manual
Hide thumbs Also See for E23CS75DSS0:
Table of Contents

Advertisement

Section E - Refrigeration System
amount of refrigerant loss).
4.
Low suction pressure (vacuum).
5.
Low wattage.
The condenser will be "warm to cool", depending
on the amount of refrigerant lost.
When refrigerant is added, the frost pattern will
improve, the suction and discharge pressures
will rise, the condenser will become hot and the
wattage will increase.
In the case of a low side refrigerant leak resulting
in complete loss of refrigerant, the compressor
will run but will not refrigerate. Suction pressure
will drop below atmospheric pressure and air and
moisture will be drawn into the system saturating
the filter drier.
If there is reason to believe the system has
operated for a considerable length of time with no
refrigerant and the leak occurred in the low side of
the system, excessive amounts of moisture may
have entered the system. In such cases the two
stage service Dryer Filter part number 5303918288
and vacuum procedure listed under Refrigerant
Leaks on page E 15 need to be followed to prevent
repetitive service.
If a slight undercharge of refrigerant is indicated
and no leak can be found after a thorough leak
test, the charge can be corrected without changing
the compressor.
If a high side leak is located and some refrigerant
remains in the system it is not necessary to change
the compressor.

Testing for Refrigerant Leaks

If the system is diagnosed as short of refrigerant
and the system has not been recently opened,
there is probably a leak in the system. Adding
refrigerant without first locating and repairing
the leak or replacing the component will not
permanently correct the difficulty. The leak must
be found. Sufficient refrigerant may have escaped
to make it impossible to leak test effectively.
In such cases, add a ¼" line piercing valve to
the compressor process tube. Add sufficient
refrigerant vapor to increase the pressure to 40 to
50 lb. per sq. in. Check the low side for leaks. Run
the compressor 2 or 3 minutes and check the high
side for leaks. Recover refrigerant using an EPA
approved recovery system.
NOTE
.
The line piercing valve (clamp-on type) should be
used for test purposes only. It must be removed
from system after it has served its purpose.
Checking for Internal (Hot
Tube) Leaks
Before checking for internal leaks, check all
accessible system components and joints for leaks.
If an internal hot tube leak is suspected, it must be
confirmed. Use the following procedure:
1.
Recover refrigerant by using EPA approved
recovery system.
2.
After system refrigerant is completely
recovered, disconnect drier from hot tube.
Pinch off and solder end of hot tube closed.
3.
Cut line from condenser to hot tube and
solder a ¼"charging hose fitting to open end
of hot tube or put compression fitting on tube.
4.Connect pressure gauge and access valve
to hot tube and pressurize to 250 psig using
dry nitrogen or carbon dioxide.
WARNING
Never pressurize with oxygen. never open a
high pressure tank unless it is equipped with
a pressure regulator. never put high pressure
on dome of compressor – it could explode.
make sure gauge, HOSES, AND ALL fittings
are in good condition and do not leak.
5.
Leave pressure on hot tube for 24 hours. Any
drop in pressure is indication of leak.
If dry nitrogen or carbon dioxide is not
available, follow steps 1 through 3 above, then
steps 4 and 5 below:
4.
Connect gauges to charging hose fittings.
Pull vacuum on hot tube.
5.
Leave vacuum on each side of system for 24
hours. Any loss of vacuum indicates leak.
65

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Ei26ss30js

Table of Contents