Manitowoc Ice Machine Error Code E32: RS485 Communication Lost
E32 means a device on the RS485 port of a Manitowoc Indigo ice machine stopped communicating with the control board, usually a gateway. It affects remote monitoring, not ice making. Check whether your building uses remote monitoring for this machine, confirm ice is being made, and leave the cables alone.
Low: only the data link is down; ice making is unaffected.
- Code
- E32
- Maker
- Manitowoc
- Equipment
- Ice machines
- Applies to
- Indigo series (non-NXT) control board, Event Log (Service menu > Event Log > View ELog)
What does Manitowoc error code E32 mean?
E32 appears in the Event Log of Manitowoc Indigo ice machines without the NXT display when a device on the RS485 port stops communicating between the control board and a gateway. RS485 is a wired data link, and a gateway on it passes machine information to a remote monitoring service or to connected accessories. When the link goes quiet, the board records E32. It affects remote monitoring or connected accessories, not ice making. Most staff never notice it, since the machine keeps working while only the data link is down. The practical effect falls on whoever watches the machine remotely, who may stop receiving updates. The display text for the entry is E32. The documented areas to check are the power and connection of the gateway or accessory, the RS485 wiring and its terminations, the port on the control board, and whether the monitoring service is still in use at all.
Affected models and control systems
Manitowoc Indigo series cubers with the non-NXT control board (Service menu > Event Log > View ELog). E32 applies only where a gateway or other accessory is connected to the RS485 port.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Nothing visible on the machine
- Remote monitoring reports stop arriving
- The E32 line in the Event Log
Possible causes
Listed in Manitowoc's documentation
- Gateway or accessory power and connection
- RS485 wiring and terminations
- Control board port
- Whether the monitoring service is still in use
Other likely causes — what usually sits behind error code E32 on this control. A technician confirms which one it is before any part is replaced.
- A gateway that lost power when its outlet or adapter was unplugged for other equipment
- A monitoring subscription that ended while the gateway stayed attached
- A data cable cut or pinched where it leaves the cabinet
Safe checks before calling for service
- Check whether your building uses any remote monitoring for this machine.
- Make sure the machine is making ice as usual.
- Do not change cables.
- Bring it up at your next visit if monitoring matters.
How a technician diagnoses error code E32
- Read the Event Log for E32 and see when the link dropped.
- Confirm what is connected to the RS485 port.
- Check the gateway's power and indicator lights.
- Inspect the wiring and terminations at both ends.
- Check the board port only after the accessory side tests good.
- Moving data cables at the control board risks shorts near line voltage.
- Terminations and polarity on RS485 must be set correctly or the link will not work.
- Whether a monitoring service is active may depend on an account we need to check with the building.
How error code E32 differs from similar codes
E32 is a data-link entry and does not relate to ice making, unlike the temperature and pressure entries.
Technical reference
- Document
- Indigo Series Technician's Handbook 000014794 5/17, "Event Log" p.87-91
- Maker documentation
- Manitowoc owner support
- Edition
- Part Number 000014794 5/17
- Models / control
- Indigo series (non-NXT) control board, Event Log (Service menu > Event Log > View ELog)
- Section
- Event Log: code list p. 87, Event Log Detail table pp. 88-91 (Service menu > Event Log)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Manitowoc ice machine error codes
Does E32 stop my machine from making ice?
No. Only the data link is affected.
Will E32 clear by itself?
It can if the gateway regains power. If the service was cancelled, the entry may stay.
Do I need to fix E32?
Only if you rely on remote monitoring. Otherwise it is safe to leave until your next visit.
Need help with Manitowoc error code E32?
A technician confirms the cause on site and gives you the price in writing before any work starts.