Hoshizaki M029-897 service manual G. Error Codes

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 first.

4.Press the "RESET" button to return to list. To clear error log history, press and hold the "SERVICE 1" and "SERVICE 2" buttons simultaneously for 5 sec.

5.Display returns to normal if no buttons are touched for 20 sec.

Error Codes

Error	Problem	Corrective Action/Reset Details
Code
E1	Freeze Cycle Backup Timer	Check for inlet water valve leaking by, hot gas valve
	Freeze cycle backup timer (Control Board Setting	leaking by, pump motor not pumping, thermostatic
	6) has terminated.	expansion valve not feeding properly, low charge, or
	45 min. after water tank starts to close in	inefficient compressor.
	preceding harvest cycle, unit stops if the
	evaporator temperature is above 32°F (0°C).	Press the "RESET" button to reset.
E2	Harvest Cycle Backup Timer	Check for open thermistor, HGV not opening, TXV
	Harvest cycle backup timer has terminated.	leaking by, low charge, or inefficient compressor.
	30 min. after water tank starts to open in harvest
	cycle, unit stops if harvest cycle termination	Press the "RESET" button to reset.
	temperature (Control Board Setting 1) has not
	been reached.
EE	Water Tank Opening Backup Timer	Check actuator motor and control board.
(E3)	3-minute opening backup timer starts when water
	tank starts to open.	Press the "RESET" button to reset.
	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.
EE	Water Tank Closing Backup Timer	Check actuator motor and control board.
(E4)	3-minute closing backup timer starts when water
	tank starts to close.	Press the "RESET" button to reset.
	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.

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