Sanyo MBR-304DR Alarms & Safety Functions, Alarms and safety functions, Alarm test procedure

ALARMS & SAFETY FUNCTIONS

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

Table 2 Alarms and safety functions

Alarm & Safety	Situation	Indication	Buzzer	Safety operation
High temperature	If the upper or lower temperature sensor	Alarm lamp flashes.	Intermittent tone	Remote alarm
alarm	senses a temperature ≧ 6oC.
Low temperature	If the upper or lower temperature sensor	Alarm lamp flashes.	Intermittent tone	Remote alarm
alarm	senses a temperature ≦ 2oC.
Protection of	If the high-temperature thermostat			Compressor ON.
excessive high	sensor senses a temperature	-----	-----
				Heater OFF.
temperature	approximately > 10oC.
Protection of	If the alarm sensor senses a			Compressor ON.
excessive low		-----	-----
	temperature approximately < 2oC.			Heater OFF.
temperature
	When the power to the unit is
Power failure alarm	disconnected or power switch is	Alarm lamp flashes.	Intermittent tone	Remote alarm.
	turned off.
			Intermittent tone
Door alarm	When the door is ajar or open.	Door check lamp is lit.	with 2 minutes	-----
			delay.
Auto-return	When there is no key pressing in	Monitor bottle temperature is	-----	Finishing of calibration
	each setting mode for 90 seconds.	displayed.		mode.
	If the temperature sensor of upper	Alarm lamp flashes.
	monitor bottle is disconnected or	E1 and monitor bottle temp.	Intermittent tone	Remote alarm.
	short-circuited.	are displayed alternately.
	If the temperature sensor of lower	Alarm lamp flashes.
	monitor bottle is disconnected or	E2 and monitor bottle temp.	Intermittent tone	Remote alarm.
Thermal sensor	short-circuited.	are displayed alternately.
abnormality	If the defrost sensor is disconnected or	Alarm lamp flashes.
		E3 and monitor bottle temp.	Intermittent tone	Remote alarm.
	short-circuited.
		are displayed alternately.
	If the over-temperature sensor is	Alarm lamp flashes.
		E4 and monitor bottle temp.	Intermittent tone	Remote alarm.
	disconnected or short-circuited.
		are displayed alternately.

Note:

The remote alarm is silenced by pressing the buzzer stop key (BUZZER) as the remote alarm is operated in conjunction with the buzzer, except for the power failure alarm. 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 test procedure

The alarm function can be checked by the following procedure:

1.Press alarm test (ALARM/TEST) key.

2.The audible and visual alarm indicators activate along with the remote alarm. The alarm condition remains active for 30 seconds and then terminates automatically. The audible alarm (buzzer) cannot be silenced by pressing the buzzer stop key (BUZZER).

3.Otherwise the alarm test can be terminated manually at any time during the rest by pressing the ALARM/TEST key again.

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