Support / FAQs / About techtown

Manitowoc Ice Machine Error Codes for Technicians

Manitowoc Logo on Indigo Machine Manitowoc Error Codes and How to Resolve Them

The Manitowoc Indigo Series of ice machines is one of the most popular models used. Because of how often it’s used in commercial kitchens, hotels and other institutions, it’s important to know how to diagnose an issue based on the particular error code the ice machine displays. Here is a walk-through of how to use the Indigo Series event log, including a list of Manitowoc error codes and their meanings.

Using the Event Log Menu

According to the Manitowoc manual, to access the Event Log menu, press the Down arrow to find the “Event Log” option, then press the Checkmark key to access.

To see the first event code, when it occurred and how many times it occurred, make sure “View ELog” is highlighted. Then, use the Down arrow to see more information on subsequent codes. Return to the Event Log menu by using the Left arrow.

To clear the event log, highlight “Clear ELog” in the Event Log Menu and press the Checkmark. Once it’s cleared, press the Left arrow to return to the previous screens.

Error Codes & Event Log Details

Below is a full list of each error code, description and definition for you to refer to.

CodeDisplay TextError DescriptionDefinition
E01Long FreezeLong freeze6 Consecutive 60 -minute freeze cycles = shut down and flash the SL#1 light on board
E02Long HarvestLong harvest3 consecutive 3.5-minute harvests logs SL#2 in memory, but will run until 500 long harvest cycles occur.
E03Power LossPower Supply (Event Log Only -no alert)When power to the ice machine has been interrupted, the control board will log the event in the ELOG and stamp the loss of power on power-up
E04Hi Cnd Temp or Wtr Cnd Fault– Air condenser high temperature/water condenser high temperature
– G Board Rev 4.017 – Alert only after 10 consecutive seconds
1) Liquid line temperature is too high for self-contained air-cooled machine = Air-Cooled Condenser Fault
2) Liquid line temperature is too high for self-contained water-cooled ice machine = Water-Cooled Condenser Fault
E05HPC FaultHigh-Pressure Cutout (HPC)The high-pressure cutout switch (HPCO) opened 3 times in a 4-hour period
E06Spare
E07Starving TXV– Starving Evaporator for single TXV or low on charge
– G Board Rev 4.017 – Event Log only, no alert
10 consecutive occurrences where the difference of the average evaporator inlet (T3) and outlet (T4) is greater than 12 degrees F in the last 1 minute of the freeze cycle (ELOG-E07)
E08TXV Fault– Air/Water only
– TXV malfunction in dual circuit/single evaps (TXV Fault)
10 consecutive occurrences where the difference of the average evaporator inlet (T3) and outlet (T4) is greater than 12 degrees F in the last 1 minute of the freeze cycle (ELOG-E07)
E09Flood Evap 1Flooding evaporator for single circuit single evaporator (flooding evap)Average compressor discharge line temperature lasts 6 seconds of Prechill +50 degrees F (T1) compared to the average of the first 6 minutes of the freeze cycle (T2), is less than 1.05 degrees F
E10 Flood Evap 2 Flooding evaporator for dual TXV dual circuit/single evaporator (flooding evap) Average compressor discharge line temperature lasts 6 seconds of Prechill +50 degrees F (T1) compared to the average of the first 6 minutes of the freeze cycle (T2), is less than 1.05 degrees F
E11Refig FaultRefrigeration system (Refrig Fault)
*Air & water-cooled only
The compressor discharge temperature did not increase by at least 1 degrees F, and the evaporator temperature
E12Curtain FaultCurtain Switch open for more tha 24 hours (Curtain Fault)The ice machine is set to ice making and remains in bin full condition for more than 24 hours. The curtain switch is open or the curtain is off.
G Board Rev 4.017?Event Log only with no alert
E13 Spare
E14 Spare
E15Low Liq TempLow amb control fault during low ambIf the liquid line temperature drops below 60 degrees F for any period of time exceeding continuously for 1 minute during the freeze cycle. G Board Rev 4.017 – Event Log only with no alert
E16Rmt Cnd FaultRemote Condenser Fault
ICVD Condensing Unit only
If the liquid line temperature drops below 40 degrees F, or exceeds 140 degrees F for more than 1 continuous minute during the freeze cycle. G Board Rev 4.017 – Event Log only with no alert
E17 Spare
E18 Spare
E19ITP FaultIce Probe (ITP)The monitored frequencies is out of the appropriate range (probe is unplugged or there’s a problem with the microphone)
G Board Rev 4.017 – Event Log only with no alert
E20WTR FaultWater System faultAny of the following:
1) Sensing high water probe and not low water probe = Water fault
2) The evaporator outlet temperature is less than -10 degrees F 6.5-7.5 minutes into freeze
3)
E21T1 FaultT1 SensorEach thermistor reading is monitored continuously using 6-second average values. During Pre-chill, a thermistor had a 6-second average thermistor values fall outside of the valid temperature range.
E22 T2 Fault T2 Sensor Refer to E21 Code definition
E23 T3 Fault T3 Sensor Refer to E21 Code definition
E24 T4 Fault T4 Sensor Refer to E21 Code definition
E25Bin Prb FaultBin Low SensEach thermistor reading is monitored continuously using 6-second average values. A thermistor had a 6-second average value outside of the valid range for more than 10 continuous minutes.
E26 Bin Prb Fault Bin Med SensRefer to E25 definition
E27 Bin Prb Fault Bin Hi Sens Refer to E25 definition
E28AUCSAUCS (Aucs not present)
(Event Log Only – no alert)
When the AUCS clean option is selected from the menu, the control checks for the presence of the AUCS board; if the AUCS is not connected, it will signal an event labeled “AUCS.”
E29USB COMMUSB Comm (Event Log Only – no alert) USB communication error, no USB drive in port or defective USB drive
E30USB DNLDUSB download error (dlnd)
(Event Log Only – no alert)
USB download error related to USB drive or a defective USB drive
E31Safe ModeSafe Mode (Event Log Only – no alert) Safe mode allows the ice machine to operate for a period of time in the event of a WLP or ITP sensor failure. The controller allows the machine to operate based on historical information collected and model data information stored in the memory of the controllers.
E32RS485 COMM Event Log Only – no alertThe device plugged into the RS485 port is not communicating between the control board and gateway
E33KEYBOARD Event Log Only – no alert The keyboard is not plugged into the control board, or it’s faulty
E34DISPLAY Event Log Only -no alert The keyboard is not plugged into the control board, or it’s faulty

For more training tips on Manitowoc ice machines, learn how to reset both the NEO and Indigo model. If you have any insight or experiences with maintaining Manitowoc models, leave your comments below!