Condensing System - Structural Concepts BLEND NM4855RSSV User Manual

TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - CONDENSING SYSTEM
CONDITION
Head Pressure Check that the condensing coil is not dirty or covered.
Too High
Check that condensing fans are working.
Check that refrigerant is not overcharged.
Perform sub-cooling check and verify that no contaminates are in system.
Check that liquid line filter dryer is not plugged.
Check that close-offs are intact (around condensing coil) and that air is not
recirculating.
Check that store ambient temperature isn't above maximum allowed. See
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING /
PLUGS section in this manual.
Head Pressure Check if sight glass is flashing or showing low charge.
Too Low
Check that suction pressure isn't too low.
Check that compressor reed valves aren't bad. Look for high suction/low head
pressure. Perform pump-down.
TROUBLESHOOTING
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