Txv Troubleshooting - Traulsen G Series Manual

II. b - TXV Troubleshooting
Standard Operating Parameters:
(As measured in Figure 5, Page 14)
•
Superheat – 7⁰F (-13.9⁰C)
•
Subcooling – 4
Troubleshooting:
Superheat
Above 7F
Below 5F
Above 7F
Table 11
Moisture Contamination:
A restriction caused by moisture will thaw when the TXV is warmed and the system will begin to
function properly until the moisture finds its way back to the TXV and freezes at the orifice
again. See Table 11.
O O
F-12 F (-15.5⁰C TO -11.1⁰C)
Subcooling Diagnosis
Below 4F Refrigerant Charge is Low
Above 12F System Overcharged
Above 12F Restriction in High Side or Metering Device
15