829 / 1428
HVAC
859
HVAC
(h) Manifold gauge will show following readings if expansion valve opens too far:
Troubleshooting chart for above condition:
Symptom
Problem
Cause / Reason
Remedy
Insufficient cooling, frost Pressure is high on both Expansion valve faulty Check expansion valve and
or large amount of dew low pressure side and high
replace if found defective
on piping at low pressure pressure side
side.