High Side Leak
refrigeration
Description
Refrigerant is leaking past a high-pressure-side component into the low-pressure side, and the unit gives an alarm only.
Activation Conditions
Refrigerant pressure is leaking past one of the components in the high pressure side of the refrigeration system into the low pressure side.
Unit Behavior
Alarm Only
Reset Conditions
Auto reset if Pretrip is started again, or Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check System Pressures: Install manifold gauge set to check and compare actual compressor discharge and suction pressures with those shown in Unit Data. Refer to Section 1.9.12 for instruction on comparison. 2. Check Compressor a. Perform Pump-Down Test. Refer to Section 1.8.1. Must hold a vacuum and not equalize in a short period of time. b. Cover condenser and build-up discharge pressure. Must be able to raise pressure to 400 psig (27.2 bar). c. Disassemble and inspect compressor valve plates, cylinder suction valves, cylinder discharge valves and pistons, etc. Must be intact, clean, and in good working order. Refer to Section 1.8.