Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 - Manual (Page 29)

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3. Cabinet Defrost Alarm (E3)
Once the defrost termination temperature is reached, the signal from the defrost
thermistor should terminate the defrost. If the defrost thermistor does not terminate the
defrost within 100 minutes (1 hour and 40 minutes), "E3" is displayed. When "E3" is
displayed, the next step in the defrost process begins.
Reset Options
To reset the alarm, turn the power off and then back on.
Possible Causes (for further details see "III.B. Service Chart")
• Trouble with the defrost heater.
• Trouble with the defrost thermistor.
• Trouble with the control board.