R-Pro › Field cases › Refrigeration systems
Low Pressure Drop from Excessive Evaporator Frost
Likely causes
Defrost system failure (heater, timer, sensor)
Check: Manually defrost and check if low pressure normalizes
What to do: Manually defrost and check if low pressure normalizes → Check defrost heater continuity → Check defrost timer/controller operation → Inspect door seal → Refer to 'Excessive Frost Buildup' category
Excess moisture from faulty door seal
Check: Check defrost heater continuity
What to do: Check defrost heater continuity → Check defrost timer/controller operation → Inspect door seal → Refer to 'Excessive Frost Buildup' category
Excessive load operation
Check: Check defrost timer/controller operation
What to do: Check defrost timer/controller operation → Inspect door seal → Refer to 'Excessive Frost Buildup' category
Excessive frost is blocking heat exchange, causing low pressure. Defrost and inspect the defrost system.
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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