Sanyo MDF-U53V, MDF-U73V, MDF-C2156VAN manual Alarms

2 min. 4 min. 6 min.

Start-up sequence

Structural Diagram

Construction

Patented VIP insulation technologies

SANYO pioneered a revolutionary vacuum insulation cabinet construction that reduces the wall thickness to approximately one half and achieves up to 30% more storage capacity than a conventionally insulated freezer without increasing the footprint. VIP Insulation maximises storage capacity when space is limited. When

using multiple units, large amounts of space can be saved compared to conventionally insulated freezers.

			Conventional				MDF-U73V
			Insulation				with V.I.P. Insulation
	Polyurethane		Capacity				125%
	foam
			58			1L	728			L
		Barrier	2	0.5
					cu.		2	5.7
		film bag				ft.			c
Steel		Vacuum							u.ft.
		insulation
		panel	2” box Inventory
		Steel
			440 pcs. 2” boxes				528 pcs. 2” boxes

Advanced ultra-low temperature refrigeration system

The SANYO cascade refrigeration system is specifically designed for ultra-low temperature applications and offers superior performance and durability, even in high ambient temperatures and in response to frequent door openings. The cooling system maintains uniform temperatures with quiet, energy efficient operation.

Accurate microprocessor temperature control

The SANYO microprocessor control system utilises SANYO made electronic components to ensure precise and reliable ultra-low temperature operation.

Reliability

Status alert

For improved reliability, Status alert function monitors ambient and system conditions continuously and notifies of any abnormalities before a problem occurs.

LCD	Status details	Countermeasure
	Abnormality in	Recheck air conditioning of
	ambient temperature	installation location.
	Drop in power supply voltage	Use exclusive power supply.
		Sort contents; inspect door

Overloaded operation	sealing condition.
• For upright types

Filter-clog check

A microprocessor controlled filter check function protects the refrigeration circuit by notifying the user of a blocked condenser filter via an alarm lamp. (Except MDF-C8V which is filter-less).

Frost reduction

SANYO’s unique combination of a “hot line”, routed around the door seal, and insulated inner doors provide an excellent airtight seal which prevents ice build-up around the door.

Safety

Alarms

•An alarm lamp and buzzer offer secure warning of power failure or abnormal temperature increase. In addition, battery back-up allows the internal temperature to be checked during a power failure.

•High and low temperature warnings provide an audible and visual alarm when the temperature deviates more than ±5°C to ±20°C (adjustable) from the set point.

•Alarm ring back function ensures that the buzzer resumes opera- tion, should alarm conditions continue after it is silenced.

•Remote alarm terminals are also provided as standard equipment for individual or group control.

Notifications

A battery life notification function is also provided to notify users of accumulated battery time.

Self diagnostic

The temperature sensor, filter sensor and cascade sensor monitor operation conditions continuously. Should an abnormality be picked up, an error code and the current freezer temperature will be dis- played in turn.

Tamper proof

To prevent unauthorised access to freezer settings, a key-lock func- tion is provided that blocks changes being made through the keypad.

Delay start

On power failure recovery, typically every unit in the lab will try to start-up simultaneously. This can create a significant drain on the electricity supply and a drop in voltage that may cause the breaker to trip again. SANYO’s exclusive compressor start-up delay function enables compressor startup during recovery after a power failure to be delayed for several minutes, in order to

reduce and distribute the sudden electrical 1 2 3 load during recovery and enable smooth

restarting of laboratory operations. Start-up delay is programmable from 2 to 15 min. The advantage of this system is that the start-up of multiple freezers can be stag- gered over a period of up to 15 minutes, which provides an even electrical load on power failure recovery.

Convenience

Data acquisition

The SANYO DAQ system, SANYO’s original data acquisi- tion software, enables remote setting and monitoring of VIP freezers. (Option)

Easy-access filter

The condenser filter is situated at the bottom right side of the front panel to make filter remov- al and cleaning easier. (Except MDF-C8V which is filter-less)

Hot line