9. ERROR CODES
Code
Error
Icemaking
E0
Water Leak
Low Ice
E1
Production
Float Switch
E2
Error
Gear Motor
Error or Gear
E3
Motor Sensor
Circuit Open
Abnormal High
E4
Side Pressure
Gear Motor
E5
Drive Element
Error
Discharge Pipe
E8
Temperature
Error
Water
Temperature
EA
Thermistor
Circuit Open
Condenser
Center
Eb
Thermistor
Circuit Open
Resistor Circuit
EC
Open
Abnormal Gear
Ed
Motor Current
Gear Motor
EE
Rotation
Error
Condition
Following initial water
supply, Float Switch trips at
lower float level after Gear
Motor starts and before
Compressor starts.
Icemaking cycle takes too
long.
With Flush Water Valve
OFF, Float Switch trips at
both upper and lower float
levels for 2 seconds.
Gear Motor is ON with
Rotation Sensor or Current
Sensor circuit open.
Gear Motor Relay is ON
with Gear Motor protective
circuit detector OFF.
c2 error occurs 5 times in 1
hour of Compressor
operation.
Gear Motor is OFF on
Controller Board while
Rotation Sensor signals
Gear Motor rotation or
current flows.
Discharge Pipe Thermostat
is OFF.
Water Temperature
Thermistor circuit is open.
Condenser Center
Thermistor circuit is open.
Resistor circuit is open.
Current Sensor detects
locked or hunting Gear
Motor.
Rotation Sensor detects
reversing.
Rotation rate reduces with
current higher than setting
and voltage exceeding low
voltage reset setting.
Operation
Reset
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
E4 blinks.
N/A
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
EA blinks.
N/A
Eb blinks.
N/A
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
Whole unit
Press Reset
stops.
Button.
68
Check/Repair
Water leak, Flush
Water Valve not
closing, Float Switch
Gas leak, Control
Water Valve not
closing, Vapor lock,
Freeze up, Float Switch
Float Switch
Rotation Sensor,
Current Sensor
Gear Motor protective
circuit (TPO, Overload,
etc.)
Fan Motor, Cooling
water circuit,
Refrigeration circuit,
Condenser clogged,
Water supply,
Installation conditions
Miswiring, Gear Motor
Magnet Switch or Relay
Replace Controller
Board.
Gas leak, Compressor
Cooling Fan failure
Water Temperature
Thermistor
Condenser Center
Thermistor
Resistor
Gear Motor locked,
hunting or overloaded
Gear Motor locked,
hunting, reversing or
overloaded
Introduction
If you own a Hoshizaki ice machine, you know how important it is to keep it in good condition. However, even with regular maintenance, your ice machine may encounter errors. When this happens, it’s important to know what the error codes mean and how to fix them.
When an error occurs, your Hoshizaki ice machine will display a two-digit error code. Some common error codes include:
- 3E – This error code indicates a problem with the water supply.
- 2B – This error code indicates a problem with the bin thermistor.
- 15 – This error code indicates a problem with the float switch.
If you see any of these error codes, it’s important to take action immediately to prevent further damage to your ice machine.
Fixing Error Codes
The first step in fixing an error code is to consult your Hoshizaki ice machine’s manual. The manual will provide detailed instructions on how to resolve the error code. However, there are some general steps you can take:
- Check water supply – If you see a 3E error code, check the water supply. Make sure the water line is connected and has adequate water pressure.
- Clean the bin thermistor – If you see a 2B error code, clean the bin thermistor with a soft cloth. Make sure it is properly positioned and functioning.
- Replace the float switch – If you see a 15 error code, you may need to replace the float switch. Consult your manual for specific instructions.
Preventing Errors
The best way to avoid errors is to keep your Hoshizaki ice machine well-maintained. Some tips for maintenance include:
- Clean the machine regularly – Regular cleaning prevents buildup of dirt and debris, which can cause system failures.
- Check water filters – Dirty water filters can cause water supply problems. Check filters regularly and replace them as needed.
- Inspect components regularly – Inspect components such as the condenser and compressor for signs of wear and tear. Replace any worn components promptly.
Conclusion
Hoshizaki ice machines are reliable and durable, but they can still encounter errors. Knowing what the error codes mean and how to fix them is critical to keeping your ice machine in good condition. Regular maintenance is also important for preventing errors from occurring in the first place. By following these tips, you can keep your Hoshizaki ice machine running smoothly for years to come.
27
G. Error Codes
When the control board detects an error, the display shows one of the following error
codes in the display mode. Error codes other than E1 and E2 are displayed as «EE» at
the time of occurrence. To see the actual error code, see the error log.
1. With the unit on, press and hold the «SERVICE 1» button for 3 seconds. Display changes
to «n1».
2. Use the «SERVICE 1» and «SERVICE 2» buttons to move through the list until «h4» is
displayed.
3. Press the «RESET» button to view the error log. Displays up to 5 errors with the most
recent error rst.
4. Press the «RESET» button to return to list. To clear error log history, press and hold the
«SERVICE1» and «SERVICE 2» buttons simultaneously for 5 sec.
5. Display returns to normal if no buttons are touched for 20 sec.
Error Codes
Error
Code
Problem Corrective Action/Reset Details
E1 Freeze Cycle Backup Timer
Freeze cycle backup timer (Control Board Setting
6) has terminated.
45 min. after water tank starts to close in
preceding harvest cycle, unit stops if the
evaporator temperature is above 32°F (0°C).
Check for inlet water valve leaking by, hot gas valve
leaking by, pump motor not pumping, thermostatic
expansion valve not feeding properly, low charge, or
inefficient compressor.
Press the «RESET» button to reset.
E2 Harvest Cycle Backup Timer
Harvest cycle backup timer has terminated.
30 min. after water tank starts to open in harvest
cycle, unit stops if harvest cycle termination
temperature (Control Board Setting 1) has not
been reached.
Check for open thermistor, HGV not opening, TXV
leaking by, low charge, or inefficient compressor.
Press the «RESET» button to reset.
EE
(E3)
Water Tank Opening Backup Timer
3-minute opening backup timer starts when water
tank starts to open.
If actuator motor’s internal position sensor
does not indicate water tank is fully open within
3minutes, display shows «EE» and unit stops for
60 minutes.
If error recurs after unit resumes operation,
display shows «EE» and unit shuts down.
Check actuator motor and control board.
Press the «RESET» button to reset.
EE
(E4)
Water Tank Closing Backup Timer
3-minute closing backup timer starts when water
tank starts to close.
If actuator motor’s internal position sensor does
not indicate water tank is fully closed within
3minutes, display shows «EE» and unit stops for
60 minutes.
If error recurs after unit resumes operation,
display shows «EE» and unit shuts down.
Check actuator motor and control board.
Press the «RESET» button to reset.
27
1. High Temperature Alarm (E1)
If the cabinet or rail temperature exceeds the setpoint temperature by 18°F (10°C) or
more for more than x hours, «E1» is displayed. The default value of x is «2» (2 hours).
The value of x can be changed under «F3» on the service menu. (0=No delay; 1=1; 2=2;
3=3 hours)
Note:
• After the machine has been turned off and then turned back on, the high
temperature alarm feature is not active until the area temperature reaches the
lower setpoint temperature differential.
• The high temperature alarm feature operates even during defrost.
Reset Options
The alarm will automatically reset once the area temperature reaches the lower setpoint
temperature differential.
Possible Causes (for further details, see «III.B. Service Chart»)
• Doors or drawers are opened frequently or are not completely closed.
• Trouble with the compressor or a refrigerant leak.
• Trouble with the cabinet or rail thermistor.
• Liquid line valve closed.
E1 Alarm Timer
over 2 hours
E1 Alarm Timer Reset
E1 Alarm
Timer under
2 hours
Power On
E1 Alarm Temperature 18°F
(10°C) above setpoint temp.
Setpoint Temperature and
Upper Setpoint Differential 0°F (0°C)
Lower Setpoint
Temperature Differential
3.6°F (2°C)
E1
Alarm
Reset
Temperature Display
E1
Blinking
E1 Alarm
Available
E1 Alarm
E1 Alarm not Available until
Lower Setpoint is Achieved
If faults are occurring on your Hoshizaki Ice Maker, it is very important to discover it quickly. Error codes are a great way to find out the initial problem. Error codes are usually displayed on your remote.
If you can’t find what you are looking for, give us a call on 0203 488 1889 and we will be happy to help.
Hoshizaki Ice Machine error codes:
| Error Code | Problem | Corrective Action/Reset Details |
| E1 | Freeze Cycle Backup Timer
Freeze cycle backup timer (Control Board Setting 6) has terminated. 45 min. after water tank starts to close in preceding harvest cycle, unit stops if the evaporator temperature is above 32°F (0°C). |
Check for inlet water valve leaking by, hot gas valve leaking by, pump motor not pumping, thermostatic expansion valve not feeding properly, low charge, or inefficient compressor.
Press the “RESET” button to reset. |
| E2 | Harvest Cycle Backup Timer
Harvest cycle backup timer has terminated. 30 min. after water tank starts to open in harvest cycle, unit stops if harvest cycle termination temperature (Control Board Setting 1) has not been reached. |
Check for open thermistor, HGV not opening, TXV leaking by, low charge, or inefficient compressor.
Press the “RESET” button to reset. |
| EE
(E3) |
Water Tank Opening Backup Timer
3-minute opening backup timer starts when water tank starts to open. If actuator motor’s internal position sensor does not indicate water tank is fully open within 3 minutes, display shows “EE” and unit stops for 60 minutes. If error recurs after unit resumes operation, display shows “EE” and unit shuts down. |
Check actuator motor and control board. Press the “RESET” button to reset. |
| EE
(E4) |
Water Tank Closing Backup Timer
3-minute closing backup timer starts when water tank starts to close. If actuator motor’s internal position sensor does not indicate water tank is fully closed within 3 minutes, display shows “EE” and unit stops for 60 minutes. If error recurs after unit resumes operation, display shows “EE” and unit shuts down. |
Check actuator motor and control board. Press the “RESET” button to reset. |
| EE
(E5) |
High Evaporator Temperature
If evaporator temperature 140°F (60°C) or higher for 5 sec., unit stops. |
Check for harvest problem (stuck HGV or control board relay), hot water entering unit, or shorted thermistor.
Press the “RESET” button to reset. |
| EE
(E9) |
Condenser Thermistor Error
If condenser thermistor is open or shorted for 2 sec., unit stops. Note: IM-500SAA does not utilize a condenser thermistor, therefore E9 error will not occur. |
Replace condenser thermistor. |
| EE
(EA) |
Control Board Error
If model data IC is defective, unit stops. |
Replace control board. |
| EE
(EC) |
Evaporator (Cube Control) Thermistor Error If evaporator thermistor is open or shorted for 2 sec., unit stops. | Replace evaporator thermistor. |
| EE
(Ed) |
Water Regulating Valve Error
If water regulating valve thermistor detects a temperature below the water regulating valve error detection temperature (Control Board Setting 36), error is displayed but unit continues to operate. Note: IM-500SAA does not utilize a water regulating valve, therefore Ed error will not occur. |
Check water regulating valve. Press the “RESET” button to reset. |