27
TROUBLESHOOTING: CONDENSING SYSTEM (BY TRAINED SERVICE PROVIDERS ONLY)
CONDITION
TROUBLESHOOTING
Head Pressure Too High
Check that the condensing coil is not dirty or covered.
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.
Head Pressure Too Low
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.