Scotsman Flaker/nugget ice machine Error Codes
Applies to: Flaker/nugget machines. Compiled and paraphrased from Scotsman's own Prodigy Flaked and Nugget Ice Machines Service Manual (F0522 through F1522, N0422 through N1322, including Prodigy Plus D series), hosted at scotsman-ice.com, which prints the full display code table, the strike and retry logic behind codes 1 and 2, and the code recall procedure. Always confirm against the manual for your exact model. Table last updated Aug 13, 2026.
How to read the codes
Prodigy flaker and nugget machines (F and N models) show a single character on a display under the front panel, plus AutoAlert lights: a blinking red Water light means no water sensed, and a yellow De-scale light means the cleaning timer has expired. Letters are statuses, not faults: F is freeze mode, b is bin full, C is clean cycle, L is board locked, O is off. To recall the last 10 stored codes, hold Off for 3 seconds, then press Clean repeatedly to step from newest to oldest; hold Clean and Off together for 3 seconds to clear the log; reset from any numbered code by pressing Off, then On. Important: these numbers mean different things than on Scotsman cube machines (code 1 is long freeze on cubers), so match the table to your machine type. Every code display machine also keeps a log: hold Off for 3 seconds, then press Clean repeatedly to step through the last 10 diagnostic codes from most recent to oldest. Hold Clean and Off together for 3 seconds to clear the log, and reset from any shutdown code by pressing Off then On.
The codes
| Code | Meaning | Likely causes | Operator-safe steps | Technician work |
|---|---|---|---|---|
| 1 flashing | No ice sensed: retrying | The photo eyes at the chute saw no ice fall for 10 minutes (the first 6 minutes after start are ignored); the machine waits 10 minutes and retries, up to three strikes | Watch whether ice flows down the chute on the retry; clean scale off the photo eyes | Refrigeration and auger drive diagnosis if no ice is actually being made |
| 1 steady | No ice sensed: shut down | Three consecutive no-ice strikes; the machine stops and must be manually reset | Press Off, then On to reset once; if it returns, stop and record it | Refrigeration system and auger motor diagnosis |
| 2 flashing / steady | Auger motor high load | The auger drive is drawing too many amps: gear reducer or auger bearing damage, or a restriction between reservoir and evaporator; the control retries after 4 minutes, then shuts down steady on repeat overload | Reset once (Off, then On); if it recurs, stop running the machine | Gear reducer, bearing, and auger inspection |
| 3 | No water in reservoir | Water supply off, exhausted filters, low level, or a dirty water sensor | Restore water, change overdue filters, and have the sensor probes wiped clean | Float valve and water sensor service |
| 4 | Refrigeration pressure too high or low | High or low pressure cutout opened: dirty condenser or filter, fan failure, water flow problems, or refrigerant charge faults; the switches auto-reset and the controller restarts | Clean the air filter and check for blocked airflow; note how often it recurs | Refrigerant-side diagnosis (EPA 608 required) |
| All 4 upper lights flashing | Unit remotely locked out | A leasing or subscription control has locked the machine | Contact the leasing company | Not a repair condition |
| F | Freeze mode: the machine is making ice | Normal operation. A flashing F means freeze mode is pending: the auger drive motor is starting up, and the compressor joins once the F goes steady. | Nothing to do, this is the running state. If F flashes for a long time without going steady, note it for the technician. | A machine stuck at flashing F points at the auger drive start circuit: motor, start components, or controller output. |
| b | Bin full, ice making paused | The photo eyes at the chute see a full bin, or the optional bin thermostat circuit is open. The manual's diagnosis for a false b: ice or scale on the photo eyes, eye holders out of position, bin stat capillary iced or the stat failed open, or a cold ambient at the bin. | Use ice down below the sensor level and the machine restarts on its own. If the bin is not actually full, wipe the photo eyes clean per the maintenance procedure. | Check photo eye position and continuity, and on bin-stat machines check the thermostat continuity with the capillary warm; replace a stat that will not close. |
| C | Clean cycle running | Someone pressed Clean: the auger motor runs, the De-scale light blinks, and after 20 minutes the compressor joins for the descale sequence. | Let the full descale and sanitize procedure finish, keep the reservoir fed with solution as the manual describes, or the De-scale light will stay on. | If C shows without a commanded cleaning, check the Clean button and controller. |
| E | Controller self test failed | The controller's power up self test did not pass; the Power light also blinks green for a self test failure. | Reset once: press Off, then On. If E returns, book service. | Check 12 volt supply from the transformer and replace the controller if the self test keeps failing. |
| L | Board locked, buttons ignored | The controller lock feature is on, usually set deliberately to stop unauthorized switching. | Unlock per the manual: hold the On button for 3 seconds, keep holding, then press and release Off twice. | Same procedure; if the lock will not release, the controller has an input fault. |
| O | Machine switched off at the controller | Someone pressed Off, or the machine finished its shutdown after Off was pressed mid cycle. | Press and release On; the machine goes through startup and resumes in about two minutes. | If O will not clear on the On button, check the button switch and controller input. |
| d | Test mode active | A technician started test mode (hold Off 3 seconds, release, then hold Clean 3 seconds). | If you find the machine showing d, a service visit left it in test mode: press Off then On to reset to normal operation. | Use test mode for component checks, then reset the control before leaving site. |
If this needs an ice machine technician
19 companies in this directory name Scotsman on their own site: that page shows who has been phone-confirmed, who publishes 24/7 cover, and what each puts in writing. Start there if the brand matters more than the city.
Two questions worth reading before you ring anyone: what to do first when a code appears and how to tell whether it is yours to fix.
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Related: the PM checklist that prevents the most common codes outright, and the operator guides for symptom-first diagnosis.
Not sure this is the right make? The lookup by code shows every make that uses a given code, and flags the ones that mean different things depending on the machine in front of you.