Dometic Manual Refrigerator Diagnostic Service Manual - WebRing

(25)
Three things must be remembered
when diagnosing a cooling unit:
First, circulation within the cooling
unit is totally gravitational. This
means proper leveling is important.
Second, heat - created to boil
the ammonia - now has to be dissipated
into the surrounding air. Heat
from the absorber and condenser must
also be dissipated so as to cool the
ammonia sufficiently.
Third, proper heat application at
the boiler section.
(26)
When diagnosing a cooling unit, remember this
is the only part we cannot field check with test
equipment, yet it is the simplest and quickest
part to diagnose.
(27)
After the unit has been operating for
approximately one hour, 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. Equal heat between the boiler and
the absorber indicates the fluid circulation within
the unit is good.
TEMPERATURE
EXCHANGER
D-6-10
THE ABSORPTION SYSTEM
DIAGNOSING
THE
COOLING UNIT
TEMPERATURE
b
GOOD CIRCULATION
CONDENSER
EVAPORATOF
BOILER