Hoshizaki JWE-620UA-6B User Manual
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9. Error Codes
In the event of operation outside of normal parameters, the control board identifi es the issue
with an error code and beeps. If more than one error occurs, the display cycles through the
relevant error codes. For service corrections, see "III.B. Error Codes."
Error Codes
A1
Wash Tank Auto Fill Error
A2
Internal Booster Tank Auto Fill Error
A3
Wash Tank Water Level Error
o1
Internal Booster Tank Water Level Error 1
(Internal Booster Tank Water Level Float Switch Closed)
o2
Internal Booster Tank Water Level Error 2
(Internal Booster Tank Water Level Float Switch Open)
H1
Wash Tank Thermistor Error (short)
H2
Wash Tank Thermistor Error (open)
H3
Internal Booster Tank Thermistor Error (short)
H4
Internal Booster Tank Thermistor Error (open)
H5
ROM/RAM Error
H6
EEPROM Error
H7
Phase Reversal Error
10. Buzzer
• At the end of an auto fi ll cycle or other mode operation, the buzzer turns on for 0.1 second
and off for 0.1 second 10 times.
• In case of an error, the buzzer turns on for 0.1 second and off for 0.9 second repeatedly
until the error is reset. To turn off the beep, press the down button.
• When a button is pressed, the buzzer turns on for 0.1 second.
• To adjust the buzzer volume, use the volume control on the control board.
11. Special Modes
a) Internal Booster Tank Energy Saving Mode
The internal booster tank energy saving mode allows the internal booster tank temperature
to drop during periods of inactivity. To activate or deactivate the internal booster tank energy
saving mode, see " Internal Booster Tank Energy Saving Mode" (service menu item 14) in
"II.D.7.b) Service Menu Chart."
After a period of inactivity from 0 to 99 minutes (service menu item 16), the temperature
to maintain is dropped to the setpoint minus 0°F to 40°F (0°C to 22°C) (service menu item
15).
Adjust the water temperature drop so that the rinse (internal booster tank) water temperature
rises enough to be at least 180°F (82°C) after the wash cycle.
The minimum rinse (internal booster tank) water temperature for the unit to switch out of the
wash cycle and into the rinse cycle can be set from 180°F to 185°F (82°C to 85°C) (service
menu item 17). If the minimum temperature has not been reached at the end of the preset
wash cycle time (service menu item 01 or 02), the wash cycle is extended up to 60 seconds