Troubleshooting: Condensing System (By Trained Service Providers Only) - Structural Concepts Harmony HMO7536R Installation And Operating Manual

TROUBLESHOOTING: CONDENSING SYSTEM (BY TRAINED SERVICE PROVIDERS ONLY)

CONDITION
Head Pressure Too High Check that the condensing coil is not dirty or covered.
Head Pressure Too Low
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
recirculate.
Check that store ambient temperature isn't above maximum allowed. See
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS /
WIRING / PLUGS section in this manual.
Check if sight glass is flashing or showing low charge.
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.
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TROUBLESHOOTING