Haier DW-86W420 Display and Alarms, Buzzer alarm resumption after cancellation, Ult Freezer

Display and Alarms

Notes:

A flashing alarm light cannot be cancelled unless the root cause for the alarm is eliminated. The buzzing alarm can be temporarily silenced for 30 minutes by pressing the alarm silence button. However, if the problem is not fixed, the buzzer alarm will resume after 30 minutes.

The freezer is equipped with a rechargeable battery controlled by a power switch. Before operating the freezer, this switch must be turned on. Once the unit is plugged into the specified voltage, the unit operates to charge the battery. When there is a power outage, the battery sustains the temperature display. If the battery voltage is less than a threshold, the temperature display turns off. While the battery is still capable of providing power to the display, the temperature display can be turned off by unplugging the power cord and turning off the battery control switch.

The freezer is also designed to auto-adjust the inner temperature set point at high ambient. When the ambient temperature is warmer than 32 and the set point temperature is set to be lower than -82 , the set point temperature will automatically default to -82 . If the ambient temperature is equal to or cooler than 32 , the set point will resume to the intended inner set point. This feature extends the life expectancy of the freezer.

Buzzer alarm resumption after cancellation

When the unit is in the alarm mode, you may press the Silence key to stop the buzzing of the alarm. However, the remote alarm cannot be cancelled. If the alarm condition still persists after 30 minutes, the buzzer alarm resumes automatically.

Remote alarm terminals

Remote alarm terminals are located in the machine compartment in the back of the unit. The alarm signal is delivered via the terminals. The terminals are rated for 24 VDC at 1 A. The power for remote alarm system must be connected with the wire or battery with UL certificate.

Terminal output

Under normal operating conditions, the terminals with wires are open. When the unit is in the alarm mode, the two terminals with wires are in the closed mode. The following schematic is a wiring diagram.

Remote alarm terminal with brown wire

Remote alarm terminal with blue wire

DC power source Alarm device

Connect with remote alarm terminal with brown wire

Connect with remote alarm terminal with blue wire

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Temperature Adjustment and Setting

	Alarms	Silence
	-80
Run
Voltage Regulator	SET
ULT FREEZER		V

The procedure to change the freezer temperature is as follows.

1.In order to change the setting of the freezer, the freezer's control must be unlocked first. The temperature display flashes when the up or down arrow is pushed. Push the up or down arrow again to change the display to security code mode then enter the initial value 06. Push the SET key for 5 seconds. The locking sign turns off. This means the unit is in unlocked mode. Push the SET key again to select the mode for the temperature set point value, high temperature alarm value and low temperature alarm value. The matching indicator lights up as each function is chosen.

2.Freezer temperature set point: Push the SET key. Once the Inner Temp.indicator is on, the temperature set point area flashes. To change the temperature set point,

push the or key intermittently to increase or decrease the temperature setting by 1 . After the adjustment is done, do not make any further changes for 10 seconds. The temperature display stops flashing. The unit enters the locked mode. The temperature range is -10 to -86.

3.Setting of high temperature alarm:Push the	SET key to turn on the High Temp.
Alarm light. The temperature display flashes.	To change the high temperature alarm of

the unit, push the or key intermittently to increase or decrease the temperature setting by 1 . After the adjustment is complete, do not make any further changes for 10 seconds. The temperature display stops flashing. The unit enters the locked mode. When the freezer temperature is warmer than the high temperature alarm set point, the unit's alarm sounds, and the high temperature alert light flashes. High temperature alarm set point can only be set to a value of at least 5 warmer than the set point temperature of the unit. The high temperature alarm value cannot be set to exceed the maximum limit.

4.Setting of low temperature alarm: Push the SET key to turn on the Low Temp.

Alarm light.To change the high temperature alarm of the unit,push the or

key intermittently to increase or decrease the temperature setting by 1 . After the adjustment is complete, do not make any further changes for 10 seconds. The temperature display stops flashing. The unit enters the locked mode. The low

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