23
MONITOR OF FREEZER STATUS
The freezer has a function to monitor the running status of the unit as shown in table 7 below. This is to
notice the running status getting worse (not failure).
1.
The STATUS lamp is lit when one of the running status shown in table 7 is detected.
2.
The S code (--X, X: 1 to 3) is displayed on the temperature indicator by pressing STATUS key when
the STATUS lamp is lit.
3.
Pressing the STATUS key again returns to current chamber temperature on the temperature indicator.
(The indication returns to the chamber temperature display automatically when no key is operated for 90
seconds.)
Table 7. Monitor of running status
Kind of
function
Status Indication
If this status
continues
Remedy
Notice of
abnormal
ambient
temperature
When the ambient
temp. is over approx.
35
o
C or lower than
about 0
o
C.
STATUS lamp
lights.
“--1” is displayed.
Decrease of cooling
performance or
durability of
refrigerating circuit.
Recheck air-
conditioning of
installed site.
Notice of low
voltage
When the power
source voltage is
less than approx.
195V when the rated
voltage is between
220 and 240V.
STATUS lamp
lights.
“--2” is displayed.
Abnormal heat at
power supply outlet
or degrade of
starting performance
of refrigerating
circuit
Use dedicated
power source.
Notice of
overload
condition
When the running
rate of refrigerating
Circuit is higher than
usual.
STATUS lamp
lights.
“--3” is displayed.
Decrease of cooling
performance or
durability of
refrigerating circuit.
1. This is likely to
happen when a
large amount of
materials is stored.
2. Check ambient
temp., voltage, and
sealing of
outer/inner door.
Note:
• The S code displayed on the temperature indicator is changed every few seconds if two or three status
shown in the above table are detected at the same time.
（
--1
⇒
--2
⇒
--3
⇒
--1 repeated
）
• The monitoring function does not trigger a buzzer or conduct a safety operation.
the case of multiple indication of S code, follow the remedy for each status.
• The status monitor lamp (STATUS) may be lit under normal running condition when the independent
inner door (MDF-7ID or MDF-5ID) is installed because of less cooling performance. In this case, adjust
the air conditioning so that the ambient temperature is around 23
o
C, or set the chamber temperature
10
o
C higher than the current setting.
