Hoshizaki · Ice Maker error code

5 beepsBin control open (K4)

Cross-checked Power off, standard tools

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Related diagnostic guides

Guide · Ice Maker

Full-bin sensor: overfilling or stopping too early

Bin controls are infrared/optical sensors (countertop, Opal), thermostatic bulbs (Hoshizaki) or thermistor sensors. Dirty, blocked, loose or misplaced sensors cause over- or under-production.

5 steps ~30 mineasy

Guide · Ice Maker

Ice melting in the bin (portable / undercounter)

Many countertop and some undercounter machines have unrefrigerated bins: melting is normal and the melt is recycled or drained. Excess melting comes from a hot location, a door left open or poor ventilation.

3 steps ~20 mineasy

Guide · Ice Maker

Undercounter ice maker: ice slab will not release or sticks on the cutting grid

Grid-cutter (slab) ice makers freeze a sheet, release it during harvest and let a heated wire grid cut it into cubes. Most release problems come from an unlevel cabinet, scale on the evaporator plate, or a cutting grid that is unplugged or not heating. Harvest switches and probes are next.

5 steps ~60 minmoderate

More Hoshizaki ice maker codes

Hoshizaki · Ice Maker

1 beep (every 3 s)

High-temperature safety lockout

Cross-checked Licensed pro only

Hoshizaki · Ice Maker

2 beeps

Long harvest

Cross-checked High-voltage / caution

Hoshizaki · Ice Maker

3 beeps

Two long freeze cycles (max freeze time)

Cross-checked

Hoshizaki · Ice Maker

4 beeps

Bin control short (K4)

Cross-checked

Hoshizaki · Ice Maker

6 beeps

Low voltage

Cross-checked High-voltage / caution

Hoshizaki · Ice Maker

7 beeps

High voltage

Cross-checked High-voltage / caution