Hoshizaki 73168 service manual Condenser Thermistor Malfunction Alarm E9

6. Condenser Thermistor Malfunction Alarm (E9)

If the control board detects an open condenser thermistor, "E9" is displayed. When the control board detects a shorted condenser thermistor, a 10-minute delay timer begins. After the 10‑minute delay timer expires, "E9" is displayed. To bypass the 10-minute delay timer, move the power switch to the "OFF" position. Then, while pressing the rail "SET" button, move the power switch to the "ON" position.

•If this alarm appears, first make sure that the thermistor is properly connected to the control board.

•A shorted condenser thermistor is not detected by the control board during the 1st hour after power is turned on. To bypass the 1-hour delay timer, move the power switch to the "OFF" position. Then, while pressing the rail "SET" button, move the power switch to the "ON" position.

Reset Options

The "E9" alarm automatically resets when one of the following conditions is met:

•The condenser thermistor is secured to the control board.

•The condenser thermistor is within normal operating range. For details, see "II. E. Thermistor Check."

•A functioning condenser thermistor is installed.

Possible Causes

•Trouble with the condenser thermistor. For checkout procedure, see "II.E. Thermistor Check."

•Trouble with the control board reading the condenser thermistor.

E9 Alarm	E9 Alarm
Timer Start	Timer Start
Under 10 min.	10 min.
	E9 Alarm (short circuit) Reset

E9 Alarm (short circuit)

Detection PointE9 Alarm 186.8°F (86°C)

E9 Alarm (open circuit) Reset

E9 Alarm (open circuit) Detection Point -7.6°F (-22°C)

Temperature Display

E9
Alarm
Temperature
E9 Display	E9
Blinking	Blinking

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