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onstruction
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.
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)
S
afety
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.
2 min. 4 min.
Start-up sequence
6 min.
1
23
2” box Inventory
5
8
1
L
2
0
.5
c
u
.ft
.
Capacity
125%
7
2
8
L
2
5
.
7
c
u
.
f
t
.
Conventional
Insulation
MDF-U73V
with V.I.P. Insulation
440 pcs. 2” boxes 528 pcs. 2” boxes
Hot line
C
onvenience
Status alert
For improved reliability, Status alert function monitors ambient and
system conditions continuously and notifies of any abnormalities
before a problem occurs.
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
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.
R
eliability
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.
LCD Status details Countermeasure
Drop in power supply voltage Use exclusive power supply.
Overloaded operation
Sort contents; inspect door
sealing condition.
Abnormality in
ambient temperature
Recheck air conditioning of
installation location.
• For upright types
Polyurethane
foam
Barrier
film bag
Steel
Vacuum
insulation
panel
Steel
Structural
Diagram
Data acquisition
The SANYO DAQ system,
SANYO’s original data acquisi-
tion software, enables remote
setting and monitoring of VIP
freezers. (Option)
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.