Sanyo MBR-1404G Alarm, safety function, and self diagnostic function, Operating Instructions

OPERATING INSTRUCTIONS

Alarm, safety function, and self diagnostic function

This unit has the alarm and safety functions shown in Table 2, and also self diagnostic function.

Table 2 Alarm and safety functions
Kind of alarm	Situation	Indication
or safety
High	If the upper or lower
temperature	temp. sensor senses a	Alarm lamp flashes.
alarm	temperature ≧6oC.
Low	If the upper or lower
temperature	temp. sensor senses a
alarm	temperature ≦2oC.
	If the high-temp.	Unit should already be
Over-temp.	thermostat sensor
		in alarm. No further
(high) alarm	senses a temperature
	approximately＞10oC.	indication required.
Power failure	Interruption of power to	Alarm lamp flashes.
	unit or power switch is
alarm		Temp. indication off.
	turned off.
Door alarm	Outer door is ajar or	Door check lamp is lit.
	open.
	No key operation on	Monitor bottle temp. is
Auto return	control panel for ≧90
		displayed.
	seconds.
	Upper temperature	Alarm lamp flashes.
		Monitor bottle temp.
	sensor goes open or
		E1 are alternately
	short circuit.
		displayed.
	Lower temperature	Alarm lamp flashes.
		Monitor bottle temp.
	sensor goes open or
		E2 are alternately
Thermal	short circuit.
		displayed.
sensor
		Alarm lamp flashes.
abnormality
	Defrost sensor goes	Monitor bottle temp.
	open or short circuit.	E3 are alternately
		displayed.
	Over-temp. sensor goes	Alarm lamp flashes.
		Monitor bottle temp.
	open or short circuit.	E4 are alternately
		displayed.

Buzzer

Intermittent tone.

Unit should already be in a high temp. alarm.

Intermittent tone.

Intermittent tone after a delay of 2 minutes.

-----

Intermittent tone

Safety operation

Remote alarm is active.

Remote alarm is active. Compressor ON. Heater OFF.

Remote alarm is active.

Not affected.

Calibration mode is canceled.

Remote alarm is active.

Note: The remote alarm contacts will activate in conjunction with the audible alarm. The remote alarm contacts can be deactivated while pressing the BUZZER key when the unit is in alarm, except in a power failure alarm where the contacts will remain in an alarm condition until the power failure is corrected. All alarm functions will auto-reset. The buzzer and remote contacts will re-activate if the condition which caused the alarm is not corrected within 30 minutes. Alarm conditions will remain active for about 24 hours on a fully charged back-up battery in the event of a power failure. Two days operation is required to fully charge the battery after initial start-up if the power has been off for an extended period. The remote alarm contacts will remain active even if the battery is discharged.

Alarm set procedure

Press the ALARM TEST key. The audible and visual alarm indicators will activate along with the remote alarm contacts. The alarm condition will remain active for 90 seconds and then terminate automatically. Otherwise the alarm test can be terminated manually at any time during the rest by pressing the ALARM TEST key a second time.

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