Sanyo MDF-U32V instruction manual Alarms & Safety Functions, Alarms and safety functions

ALARMS & SAFETY FUNCTIONS

This unit has the alarms and safety functions shown in Table 5, and also self diagnostic functions.

Table 5. Alarms and safety functions

Alarm & Safety	Situation	Indication	Buzzer	Safety operation
High temperature	If the chamber temperature is higher
	than the temperature at which the	ALARM lamp is flashed.
alarm			Intermittent tone with	Remote alarm with 15
	high temperature alarm is activated.
		Temperature indicator is
	If the chamber temperature is lower		15 minutes delay.	minutes delay.
Low temperature		flashed.
	than the temperature at which the
alarm
	low temperature alarm is activated.
Power failure alarm	When the power to the unit is	ALARM lamp is flashed.	Intermittent tone	Remote alarm.
	disconnected.
Filter check	When the condenser filter is clogged.	Filter check lamp lights.	-----	-----
Battery check	When about 2.8 years has passed with	Battery check lamp lights.	-----	-----
	power switch ON.
Auto-return	When there is no key pressing in	Chamber temperature is	-----	Finishing of each
	each setting mode for 90 seconds.	displayed.		setting mode.
Key lock	When the key lock is “ON”.	-----	-----	Change of setting is
				disable.
		ALARM lamp is flashed.		Remote alarm.
	If the thermal sensor is disconnected.	E01 and chamber temp. are	Intermittent tone	Unit keeps continuous
		displayed alternately.		running.
		ALARM lamp is flashed.		Remote alarm.
	If the thermal sensor is short-circuited.	E02 and chamber temp. are	Intermittent tone	Unit keeps continuous
		displayed alternately.		running.
		ALARM lamp is flashed.		Remote alarm.
	If the cascade sensor is disconnected.	E03 and chamber temp. are	Intermittent tone
				Unit keeps running.
		displayed alternately.
		ALARM lamp is flashed.		Remote alarm.
	If the cascade sensor is short circuited.	E04 and chamber temp. are	Intermittent tone
				Unit keeps running.
Sensor abnormality		displayed alternately.
		ALARM lamp is flashed.
	If the filter sensor is disconnected.	E05 and chamber temp. are	Intermittent tone	Remote alarm.
		displayed alternately.
		ALARM lamp is flashed.
	If the filter sensor is short-circuited.	E06 and chamber temp. are	Intermittent tone	Remote alarm.
		displayed alternately.
	If the ambient temperature sensor is	ALARM lamp is flashed.
		E07 and chamber temp. are	Intermittent tone	Remote alarm.
	disconnected.
		displayed alternately.
	If the ambient temperature sensor is	ALARM lamp is flashed.
		E08 and chamber temp. are	Intermittent tone	Remote alarm.
	short-circuited.
		displayed alternately.
Battery switch	When the battery switch is OFF during	ALARM lamp is flashed.	-----	-----
check	alarm test.	E09 is flashed.

Note:

•When the operation is started in high ambient temperature, the filter check lamp is sometimes flashed. In this case, the lamp is off automatically when the chamber temperature is getting lower.

•The freezer resumes the operation after power failure with the temperature setting before power failure as the chamber temperature setting and alarm temperature setting are memorized in the volatile memory.

•The chamber temperature is displayed for 5 seconds by pressing BUZZER key during power failure alarm. Then the buzzer is silenced. The ALARM lamp keeps flashing.

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