21
MONITOR OF FREEZER STATUS
The freezer has a function to monitor the running status of the unit as shown in table 8 below. This is to
notice the running status getting worse (not failure).
1.
The status monitor lamp (STATUS) is lit when one of the running status shown in table 8 is detected.
2.
The S code (--1 or --3) is displayed on the digital temperature indicator by pressing the status key
(STATUS) when the status monitor lamp (STATUS) is lit.
3.
Pressing the status key (STATUS) again returns to current chamber temperature on the digital
temperature indicator. (The indication returns to the chamber temperature display automatically when no
key is operated for 90 seconds.)
Table 8. 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
(STATUS) lights.
“--1” is displayed.
Decrease of cooling
performance or
durability of
refrigerating circuit.
Examination is
air-conditioning of
installation site.
Notice of
overload
condition
When the running
rate of refrigerating
circuit is higher than
usual.
Status lamp
(STATUS) 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.
Put articles in the
chamber in a small
batch.
2. Check ambient
temp., voltage, and
sealing of
outer/inner door.
Note:
• The S code displayed on the digital temperature indicator is changed every few seconds if two status
shown in the above table are detected at the same time.
（
--1
⇒
--3
⇒
--1 repeated
）
• The monitoring function does not trigger a buzzer or conduct a safety operation.
• In 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 optional small
inner door (MDF-7ID) 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.
