What does Manitowoc Ice SL#1 mean?

Safety Limit 1 means the freeze time reached the control board's maximum (60, 45, or 30 minutes depending on firmware version), so the board forced a harvest.

What does Manitowoc Ice SL#2 mean?

Safety Limit 2 means the harvest time reached 3.5 minutes without the ice slab releasing. On UD/UY/UR machines the board energizes the water pump and extends harvest to seven minutes, then runs water-thaw cycles if the ice damper still will not open and close.

What does Manitowoc Ice SL#3 mean?

Safety Limit 3 means that during a freeze cycle the float stayed down (no water sensed) for ten continuous seconds after four minutes of freeze, so the machine stopped.

Does AskWhiz cover Manitowoc Ice equipment?

Yes. AskWhiz is trained on official Manitowoc Ice service and operator documentation, so it can answer fault-code, error-message, and repair questions for Manitowoc Ice refrigeration units directly in WhatsApp.

How do I troubleshoot Manitowoc Ice error codes?

Send AskWhiz your Manitowoc Ice model number and the error code or symptom on WhatsApp. It searches the official Manitowoc Ice manuals and returns the likely cause and the documented fix, step by step, so you stop scrolling through PDFs in the field.

Is AskWhiz a substitute for the Manitowoc Ice service manual?

No. AskWhiz reads the official Manitowoc Ice documentation and surfaces the relevant procedure fast, but always follow the manufacturer safety warnings and call a qualified Manitowoc Ice technician for work that requires one.

Refrigeration

Manitowoc Ice error codes, decoded.

Look up any Manitowoc Ice fault code below. Each one is grounded in Manitowoc Ice's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.

By Nichita Herput

Co-founder & CEO · Reviewed July 2026

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Manitowoc Ice sits in our Refrigeration coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.

What error codes does Manitowoc Ice display?

Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.

SL#1

Safety Limit 1 - freeze cycle ran too long (long freeze)

SL#2

Safety Limit 2 - harvest cycle ran too long (long harvest)

SL#3

Safety Limit 3 - no water sensed during the freeze cycle

E01

Long freeze cycle — freeze ran to the limit; repeated events trigger the SL#1 shutdown

E02

Long harvest cycle — harvest hit the 3.5-minute limit

E04

High condenser temperature (air- or water-cooled condenser fault)

E05

High-pressure cutout (HPCO) opened

E07

Starving TXV or low on charge

E19

Ice thickness probe fault

E20

Water system fault

E31

Safe Mode — reduced self-protective operation after a sensor fault

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