R-Pro › Field cases › Ice machines
Water Supply Failure
Likely causes
Water supply solenoid valve failure
Check: Measure valve coil resistance — normal 10~30Ω; open circuit or short = coil failure; if coil normal, check valve body for blockage
What to do: Replace coil if faulty; if valve body blocked, clean filter screen or replace valve
Insufficient inlet water pressure
Check: Measure with pressure gauge — normal 0.15~0.5 MPa (1.5~5 bar); below 0.15 MPa = solenoid valve cannot open
What to do: Check building-side water valve is fully open; adjust PRV; clean piping
Water supply filter clogged
Check: Measure pressure before and after filter — differential pressure above 0.05 MPa = over 20% flow reduction; visually inspect filter contamination
What to do: Replace filter cartridge (every 6 months or based on differential pressure); add pre-treatment filter if none present
Control board not outputting water supply signal
Check: Measure solenoid valve connector voltage during fill command — should show AC 24V or 110/220V; no voltage = board failure
What to do: Check connector contact first and reseat; if no improvement, replace control board
Water supply failure diagnosis order: ①measure pressure → ②solenoid coil resistance → ③filter differential pressure → ④control signal voltage — 90% resolved with these 4 steps
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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