R-Pro › Field cases › Ice machines
Timer/Relay Malfunction
Likely causes
Timer setting drift — abnormal freeze/harvest time
Check: Measure actual freeze and harvest cycle times with stopwatch — normal freeze 12~18 min, harvest 2~4 min; check settings if out of range
What to do: Reset timer parameters to factory defaults and reprogram; replace electronic timer if drift repeats
Relay contact burned — intermittent failure
Check: Measure relay contact voltage — verify contact output voltage during coil activation; use oscilloscope to confirm intermittent interruption
What to do: Replace relay with same specification; inspect PCB solder joints for cracks and resolder
Power supply voltage fluctuation — causes timer errors
Check: Measure input voltage — normal within ±10% of rated; use multimeter hold function or voltage logger to check fluctuation range
What to do: Install voltage stabilizer; report to utility if it's a distribution problem; inspect control board power supply capacitors
Timer anomalies always start with stopwatch measurement — if freeze is outside 12~18 min or harvest outside 2~4 min, check timer parameters or relay
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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