Sanyo MDF-U7486SC, MDF-U5486SC Alarms & Safety Functions, Alarms and safety functions

ALARMS & SAFETY FUNCTIONS

This unit has the alarms and safety functions shown in Table 7, and also self diagnostic functions.

Table 7. Alarms and safety functions

Alarm	Situation	Indication	Buzzer	Safety functions
High temperature	If the chamber temperature is higher
	than the temperature at which the
alarm		Alarm lamp is flashed.
	high temperature alarm is activated.		Intermittent tone with	Remote alarm with 15
		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 alarm	When the condenser filter is clogged.	Filter lamp lights.	Intermittent tone	-----
Battery check	When about 3 years has passed with	Battery check lamp lights.	-----	-----
	power switch ON.
Fan motor check	When about 6 years has passed with	Battery check lamp	-----	-----
	power switch ON.	flashes.
Auto-return	When there is no key pressing in	Chamber temperature is	-----	Finishing of each
	each set mode for 90 seconds.	displayed.		set 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.
	If the cascade sensor is disconnected.	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E03 and chamber temp. are
		displayed alternately.
	If the cascade sensor is short	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E04 and chamber temp. are
	circuited.
Sensor abnormality		displayed alternately.
	If the filter sensor is disconnected.	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E05 and chamber temp. are
		displayed alternately.
	If the filter sensor is short-circuited.	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E06 and chamber temp. are
		displayed alternately.
	If the ambient temperature sensor is	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E07 and chamber temp. are
	disconnected.
		displayed alternately.
	If the ambient temperature sensor is	Alarm lamp is flashed.	Intermittent tone	Remote alarm.
		E08 and chamber temp. are
	short-circuited.
		displayed alternately.
Battery switch	When the battery switch is OFF during	Alarm lamp is flashed.	-----	-----
check	alarm test.	E09 is flashed.
Condenser temp.	In the event of failure of fan motor for	E10 and chamber temp.		Remote alarm.
			Intermittent tone	Compressor of high
abnormality	cooling the compressor	are displayed alternately.
				stage side stops.

Note:

•When the operation is started in high ambient temperature, the filter 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 nonvolatile memory.

•The battery for power failure alarm is an article for consumption. It is recommended that the battery will be replaced about every 3 years. Contact Sanyo sales representative or agent at the time of replacement of the battery for recycling.

•Fan motors are expendable supplies. Replace them for about every 6 years. Contact Sanyo sales representative or agent at the time of replacement of the fan motor.

•The chamber temperature is displayed for 5 seconds by pressing alarm buzzer stop key (BUZZER) during power failure alarm. The alarm lamp keeps flashing.

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