Hoshizaki IM-500SAB Service Manual page 32

Error Codes
Error Problem
Code
EE Water Tank Opening Backup Timer
(E3) 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 min-
utes, display shows "EE" and unit stops for 60
minutes.
If error recurs after unit resumes operation, dis-
play shows "EE" and unit shuts down.
EE Water Tank Closing Backup Timer
(E4) 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, dis-
play shows "EE" and unit shuts down.
EE High Evaporator Temperature
(E5) If evaporator temperature 140°F (60°C) or higher
for 5 sec., unit stops.
EE Condenser Thermistor Error
(E9) If condenser thermistor is open or shorted for
2 sec., unit stops.
Note: IM-500SAB does not utilize a condenser
thermistor, therefore E9 error will not occur.
EE Control Board Error
(EA) If model data IC is defective, unit stops.
EE Evaporator (Cube Control) Thermistor Error
(EC) If evaporator thermistor is open or shorted for
2 sec., unit stops.
EE Water Regulating Valve Error
(Ed) If water regulating valve thermistor detects a tem-
perature below the water regulating valve error
detection temperature (Control Board Setting 36),
error is displayed but unit continues to operate.
Note: IM-500SAB does not utilize a water regulat-
ing valve, therefore Ed error will not occur.
Corrective Action/Reset Details
Check actuator motor and control board.
Press the "RESET" button to reset.
Check actuator motor and control board.
Press the "RESET" button to reset.
Check for harvest problem (stuck HGV or control
board relay), hot water entering unit, or shorted
thermistor.
Press the "RESET" button to reset.
Replace condenser thermistor.
Replace control board.
Replace evaporator thermistor.
Check water regulating valve.
Press the "RESET" button to reset.
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