Hoshizaki JWE-24000CUA-L-25B, JWE-2400CUA-R-25B H 3 / H, g Booster Tank Thermistor Error H3, H4

g) Booster Tank Thermistor Error (H3, H4)

•If the booster tank thermistor senses a temperature at or above 231°F (111°C) (2.4kΩ), the thermistor leads are considered shorted and the booster tank heaters de-energize, "H3" appears in the display, and the buzzer sounds.

•If the booster tank thermistor senses a temperature at or below -6°F (-21°C) (517kΩ), the thermistor leads are considered open and the booster tank heaters de-energize, "H4" appears in the display, and the buzzer sounds.

•After replacing the failed component, the alarm resets.

•See the chart below for possible causes and remedies.

Note: The auto fill cycle and the wash/rinse cycle will start even after this error occurs.



Code

H 3 / H 4

Operation

Error

Thermistor senses abnormal temperature.Continues (booster tank heater off).

Item

Thermistor

Possible Cause

Connector not properly connected.

Remedy

Reconnect.

Open circuit (H4).

Replace.

Short circuit (H3).

Replace.

Defective.

Replace.

Control Board

Connector not properly connected.

Reconnect.

Defective.

Replace.

Note: See “III.E. Thermistor Check” and “IV.H. Removal and Replacement of Thermistor.”

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