Scotsman MF26–MF66 flakers
Auger flakers with an optical bin level control, water level sensor, condenser and evaporator sensors and a drive motor speed sensor. LEDs on the PC board show the fault.
What it is: Flake / superflake ice machine. MF 26, 36, 46, 56 and 66 (new ..6 series).
Key combo: No service menu. Read the LED pattern on the PC board.
Scotsman MF26–MF66 flakers error codes
| Code | Meaning | Likely cause | How to reset |
|---|---|---|---|
| Bin full yellow LED on | Bin full | Normal | Restarts when the optical level control clears. |
| No water yellow LED on | No water | Water supply off, low level in the reservoir | Restore water. |
| Red stand-by LED blinking | Start-up delay (3 min, or 60 min on MF66 with the jumper out) | Normal | Wait for the delay. |
| Red stand-by LED blinks 3 times and repeats | Room too cold (below +3 °C) | Low ambient | Warm the room. |
| Red stand-by LED on steady | Condensing temperature too high (over 60 °C or 70 °C, by jumper) | Dirty condenser, fan or water supply fault | Fix the cause. |
| Yellow wrong rotation / evap LED on steady | Drive motor not turning, too slow (under 1200 rpm) or reversed | Gear motor, auger jammed, wiring | Repair the drive. |
| Yellow wrong rotation / evap LED slow blink after 10 min | Evaporator too warm | Short of refrigerant, expansion valve | Repair the refrigeration system. |
| No water LED + red LED both on | Condenser sensor out of order | Sensor | Replace the sensor. |
| No water LED + red LED both blinking | Evaporator sensor out of order | Sensor | Replace the sensor. |
Board jumpers
| Code | What it does | Range | Default / typical |
|---|---|---|---|
| Start-up delay jumper | Delay before the machine starts | in 3 min / out 60 min | — |
| Condenser safety jumper | High condensing cut-out | in 70 °C / out 60 °C | — |
Notes
- The training guide does not give a reset procedure for these alarms.
For licensed technicians only. This equipment can involve mains voltage, high-voltage microwave circuits, gas and refrigerant. Isolate power (and gas) before opening panels, follow the manufacturer's manual and your local licensing rules (for example ARC refrigerant handling and electrical or gas licences). Wrong settings can spoil food or damage equipment. Check every value on the unit in front of you before changing it.
Based on: Scotsman MF ..6 series technical service training guide (rev. 04-2017). Always check the manual for your exact model and software version.
ServiceModes is not affiliated with Scotsman or any other manufacturer. Written in our own words from the manufacturer's documentation.