MAHLE RTI RHS900 - Manual (Page 46)

- 13.2 -
Appendixes
C:\RHS Computer Files\Instructions\RHS\GB\642-40\0012B-01.doc 1997.09.11
RHS 900
Test - 1:
High pressure 8 - 9 bar
Low pressure Approx.
0.8 bar
Fault/Problem Symptom Possible cause Remedy
Unsatisfactory
refrigeration Conditioned air not
cold
Air bubbles in sight
glass Leakage in A/C unit
Insufficient refrigerant
in A/C unit Locate leak and
repair
Replenish with
refrigerant
Test - 2:
High pressure Approx.
20 bar
Low presure Approx.
2.5 bar
Fault/Problem Symptom Possible cause Remedy
Unsatisfactory
refrigeration Insufficient condenser
cooling
Fan does not run
Condenser performance
impaired by oil or dirt
deposits
Insufficient oil in A/C
unit (compressor fric-
tion)
Refrigerant overcharge
Clean condenser
Repair fan
Clean condenser
Replenish oil
check the refrigerant
quantity in the A/C unit -
empty the A/C unit,
evacuate and recharge thr
correct quantity
If none of these remedies
are successful, check the
refrigerant quantity in the
A/C unit - empty the A/C
unit, evacuate and
recharge
Test - 3: