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856
HVAC
(b)
Manifold gauge will show following readings under Insufficient Refrigerant condition:
Troubleshooting chart for above condition:
Symptom
Problem
Cause / Reason
Remedy
Insufficient cooling and Pressure on both the
1. Refrigerant quantity 1. Add refrigerant
bubbles observed in
low pressure side and
too small
sight glass
high pressure side is low 2. Gas leakage
2. Check for leakage and
repair if necessary
(c)
Manifold gauge will show following readings if refrigerant fails to circulate in the system:
Troubleshooting chart for above condition:
Symptom
Problem
Cause / Reason
Remedy
No cooling experienced Vacuum is indicated on Clogging of AC cycle Check and clean or replace
and temperature
low pressure side
parts such as receiver
difference exists between
dryer, expansion valve
inside pipe and outside
which may possibly clog.
pipe of the defective part
Be sure to evacuate the air
after finishing the remedy.