R-Pro › Field cases › Refrigeration systems
Main PCB (Control Board) Failure
Likely causes
PCB damaged by lightning or power surge
Check: Visually inspect PCB for charring, bulging components, or cracks
What to do: Visually inspect PCB for charring, bulging components, or cracks → Measure PCB input voltage at power supply terminal → Replace with same model PCB → Re-enter settings data after replacement (refer to manual) → Consider adding surge protection device (SPD)
Loss of control function from faulty electrolytic capacitor
Check: Measure PCB input voltage at power supply terminal
What to do: Measure PCB input voltage at power supply terminal → Replace with same model PCB → Re-enter settings data after replacement (refer to manual) → Consider adding surge protection device (SPD)
Solder crack or component burnout on PCB
Check: Replace with same model PCB
What to do: Replace with same model PCB → Re-enter settings data after replacement (refer to manual) → Consider adding surge protection device (SPD)
If power, wiring, and fuses are all normal but there is no response, the main PCB is faulty. Replace it.
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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