Types Of Blockage - Dometic MANUAL REFRIGERATOR Service Manual

To understand the absorption principle we have set up several refrigerators to inspect and diagnose.
Carefully touch the absorber and boiler sections of each unit and record your findings. Proceed with
caution as some of these units could be extremely HOT.
Listed below are three types of units you will be testing:
GOOD COOLING UNIT
Carefully touch the unit at the boiler box and the absorber area. These areas
should be approximately the same temperature, regardless of the ambient
temperature. The equal heat between the boiler and the absorber indicates the
fluid circulation within the unit is good.
BLOCKAGE
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One of the faults with a cooling unit is blockage. This can happen when the unit
is operated off-level, or if too much heat has been applied to the boiler area. To
the touch this unit will be extremely hot at the boiler with little warmth at the
absorber. In other words, NO CIRCULATION.
LEAKER
This type of fault means the unit has lost its charge - it's known as a "leaker". To
the touch this unit will be warm at the boiler and extremely hot at the absorber.
In this condition we are still boiling ammonia but have no hydrogen for
evaporation.

TYPES OF BLOCKAGE

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