MAHLE RTI RHS900 - Manual (Page 47)

- 13.3 -
Appendixes
C:\RHS Computer Files\Instructions\RHS\GB\642-40\0012B-01.doc 1997.09.11
RHS 900
High pressure Approx.
7 - 15 bar
Low pressure Approx.
1.5 bar
Fault/Problem Symptom Possible cause Remedy
Periodic
disturbances in
A/C unit Varying pressure on
high and low-pres-
sure sides Moisture in A/C unit
causes ice formation on
expansion valve resul-
ting in reduced output,
ore filter drier
saturated. Empty A/C unit,
evacuate and re-
charge. After the
recovery process,
replace filter drier.
If necessary, remove
expansion valve,
clean it and refit or
replace as necessary.
Test - 4:
High pressure Approx.
6 bar
Low pressure Approx.
-0.3 bar
Fault/Problem Symptom Possible cause Remedy
Little or no
refrigeration from
A/C unit Hoses before or af-
ter expansion valve
or filter drier cov-
ered with moisture
or ice Expansion valve or
filter drier blocked with
ice because of moisture
in A/C unit Disconnect A/C
unit, wait a few
minutes and then
empty the unit,
evacuate and
recharge