EYELA LTI- 400E User manual

R03
This manual is designed to use the product efficiently and safely with keeping its
best performance.
Please keep this manual in a place easily accessible to every user.
Be sure to read "Safety precautions
before use.
取扱説明書
Instruction
Manual
LTI- 400E
700E
1200E
Low temp. Incubator
Tokyo Rikakikai Co., Ltd.
IMPORTAN
T

Safety precautions
Do not put any inflammable substances such as
organic solvent in the chamber. Also, due to its
features and characteristics, some parts of the
product are subjected to high temperature.
Touching these parts while the unit is running
may cause you physical injury.
However, if you know proper information before
use, you can avoid almost all these troubles.
Therefore, this manual categorizes the level of
Importance and danger as below with alert mark and
signal word.
Please follow the instructions and use the product
safely.
1. Signal word for warning
Though we are trying to look into conceivable risk of using the product, it is very difficult for us
to expect of all of it. It means that all the instructions in this manual do not cover all the types
of risk that may caused by the product. However, if you follow the instructions, you surely can
handle and operate the product safely. Please use extreme care when handling the product
and to prevent all the potential accidents and mechanical failures.
Alert mark
Signal word Definition
Mishandling the product will cause serious personal injury or
loss of life.
Mishandling the product may cause serious personal injury or
loss of life.
Mishandling the product may injure users or cause property
damage.
WARNING
CAUTION
DANGER

-1-
For safety use
1
Since this product is not designed with exposion-proof structure,
use extreme caution when handling it.
Do not put any inflammable substance such
as organic solvent
When using the unit in high temperature, sample in the chamber
may evaporate and catch some ignition source, and cause a fire
or explosion. Explosive substances are nitric ester, nitro
compound. Inflammable substances are acyl salt, inorganic
peroxide, nitrate salt and organic solvent.
This product is not designed with explosion-proof structure.
DANGER
Outline of the product2
2-1 Application
Do not remodel the product.
Do not use it out of specified
application.
Remodeling the product or inappropriate use
may cause electric shock or malfunction.
This product is a low temperature incubator that is
used for hypothermic incubation of microorganism
and plant, environmental test, constant-temperature
test and hypothermic preservation.
WARNING

MSゴシック
MS明朝
※If you have any trouble reading the warning label because it is worn out
and etc., please replace with new one. Do not hesitate in contacting us if
you require new label.
2. Warning display on the product
For high priority danger, warning label is attached on the machine body.
The position of the label is as below.
Please read the instructions carefully whenever using the machine.
Explosion risk
Do not put any
inflammable
substances such as
organic solvent.
DANGE
R
※Above picture is LTI-400E.

2-2 Specification
Product name
Model
Convection system
Range of temperature
control
A
ccuracy of temperature
control ※1
Range of
temperature
distribution
※1
Temperature
control
Temperature sensor
Setting temperature・
display
Heater
F
e
a
t
u
r
e
s
C
o
m
p
o
n
e
n
t
Low temperature incubator
LTI-400E
Air jacket natural convection system
4〜60℃ Minimum digit 0.1℃
・Cont. mode（Heater P.I.D control＋Continuous operation of refrigeration unit）
・Int. mode （Heater P.I.D control＋Continuous operation of refrigeration unit＋hot
gas）
Platinum Thermo resistance Pt100Ω
Sheet key input・digital display
F
u
n
c
t
i
o
n
s
Defrosting system
※2
Safety features
-2-
LTI-700E LTI-1200E
Capacity of the chamber
Shelf
Dimension of shelf（mm）
Cable port
Anti-bacterial stainless steel board（Partially）
2 points（right and left side） Bore diameter: 40ｍｍ
Dimension of the chamber
（mm）※3
Dimensions（mm）※3
Supply power ※4
Supply voltage
Mass
S
p
e
c
i
f
i
c
a
t
i
o
n
s
Approx. 90Ｌ
500(W)×400(D)×450(H)
5〜35℃
630(W)×685(D)×1185(H)
9A 0.9kVA
AC100V 50/60Hz
Approx.85㎏
Uniformly-distributed load Max.15kg/shelf
Supplied shelves: 2 piece Supplied shelves:5 shelves
468(W)×375(D)
Shelf pitch・number of
step 40mm・4 steps×2 points 40mm・5 steps×4 points
Bath
Range of temperature range
・±0.2℃（in Cont.mode）
・±1.0℃（in Int. mode）
・2.0℃
（Cont.mode Setting value:
20〜37℃)
・3.0℃
（Cont. mode Setting value:4℃）
・4.0℃
（Int. mode Setting value:20〜37℃）
・5.0℃
（Int. mode Setting value:4℃）
・Normal operation：Microcomputer automatic control（Int. mode）
・Forced manual system（manual initiation, automatic termination, manual
Program function Automatic stop, automatic start, 1-step, 24-hour cycle operation
Stainless heater 550
W
Stainless heater 700W
Refrigeration unit・
refrigerant
A
ir-cooled type 160W・R-134a
A
ir-cooled type 300W・R-134a
600(W)×500(D)×1000(H)
Approx.300Ｌ
Door Both sides can be opened.
630(W)×705(D)×900(H)
Approx.98㎏Approx.145㎏
13A 1.3kVA
Residual current device, over heat protecting thermostat door switch, individual over heat protector
(temperature range: 30-70℃), individual overcool protector (temperature range: 0-40℃), self-diagnosis
function for temperature controller (sensor, door, upper / lower temperature limit , abnormal temperature
control, power failure, watchdog) , over load relay protective circuit for refrigeration unit, protection timer for
refrigeration unit, fuse for outlet
Temp
A
ir-cooled type 200W・R-134a
500(W)×400(D)×700(H)
Approx. 140Ｌ
Supplied shelves:3 pieces
568(W)×455(D)
40mm・7 steps×2 points
Inner door Both sides can be opened.
Acryl（1 piece）Both sides can be opened.
A
cryl（2 piece）
Service outlet
Clamp for fixing the
product Diameter of port: 7・12mm
2 outlets in the chamber（1A・2A)
1 chamber outside of the chamber
（2A)
2 outlets in the chambe
r
（1A・2A) 1 outlet in the chamber（2A)
740(W)×815(D)×1600(H)
11A 1.1kVA
Fan in the chambe
r
Axial current fan（Forced circulation system）
Temper
a
・2.0℃
（Cont.mode Setting temp.: 20〜37℃）
・4.0℃
（Cont.Mode Setting temp.:4℃）
・4.0℃
（Int.Mode Setting temp.:20〜37℃）
・5.0℃
（Int. Mode Setting temp.:4℃）
・2.0℃
（Cont.mode Setting temp.: 20〜37℃）
・5.0℃
（Cont.Mode Setting temp.:4℃）
・4.0℃
（Int.Mode Setting temp.:20〜37℃）
・6.0℃
（Int. Mode Setting temp.:4℃）

※1 Figures mentioned on the feature measured under the following condition;
Room temperature:20℃、rated supply and voltage, NO load.
Range of temperature distribution at the temperature that is not mentioned above
are;
LTI-400E・700E: Cont. mode:4℃・Int.mode:5℃
LTI-1200E Cont. mode:5℃・Int.mode:6℃
Attainable chilling temperature of LTI-400E are as follow;
10℃whiletheroomtemperatureis35℃,4℃while the room temperature is 30℃.
※2 In Int. mode, temperature change in the chamber while the defrosting operation
is performed, differs depending on room temperature, heat load and supply
power and voltage. In Int. mode, temperature change in the chamber is drastic
in higher room temperature.
※3 Dimensions of chamber and the unit exclude the length of projection.
※4 Input value does not include the capacity of service outlet.
The capacity of service outlet is LTI-400E 5A,LTI-700E 3A and LTI-1200E 2A.
＊Highest,lowest attainable temperature, accuracy of temperature control and
temperature distribution differ depending on room temperature, heat load, supply
power and voltage.
-
-3-

-4-
2-3 Characteristic of temperature rise and fall (reference)
Condition ・AC-100V 50Hz ・Center-focused temperature in the chamber
・No load
Notice Highest,lowest attainable temperature, accuracy of temperature control and
temperature distribution differ depending on room temperature, heat load, supply
power and voltage.
Attainable chilling temperature of LTI-400E are as follow;
10℃while the room temperature is 35℃, 4℃while the room temperature is 30℃.
0
10
20
30
40
50
0 1020304050 100 Time（min.）
erature（℃）
60 70 80 90
60
（1） Room temperature: 20℃
Faninthechamber:ON
110 120
70
Faninthechamber:OFF
Faninthechamber:OFF
Faninthechamber:ON
0
10
20
30
40
50
0 20 40 60 80 100 200
Time（min.）
a
ture（℃）
120 140 160 180
60
Roomtemperature:30℃
220 240
70
Roomtemperature:35℃
（2） Room temperature: 30 and 35℃, fan in the chamber: OFF
1.LTI-400E

-5-
0
10
20
30
40
50
0 1
020 3 04 050 10 0Time
（min.）
Temperature（℃）
60 70 80 90
60
（1） Room temperature: 20℃, Fan in the chamber: OFF
11
0
12
0
70
0
10
20
30
40
50
0
1
5
30
4
56
0
75
15
0
Time （min.）
Temperature（℃）
90
10
5
12
0
13
5
60
16
5
18
0
70
（2） Room temperature: 35℃, fan in the chamber:
OFF
Condition ・AC-100V 50Hz ・Center-focused temperature in the chamber
・No load
Notice Highest,lowest attainable temperature, accuracy of temperature control and
temperature distribution differ depending on room temperature, heat load,
supply power and voltage.
2.LTI-700E

-6-
0
10
20
30
40
50
0 1
530 4 56 075 15 0Time （min.）
Temperature （℃）
90 10
512
013 5
60
（1） Room temperature: 20℃
16
5
18
0
70
0
10
20
30
40
50
0
2
0
40
6
08
0
10
0
20
0
Time（min.）
Temperature （℃）
12
0
14
0
16
0
18
0
60
22
0
24
0
70
（2） Room temperature: 35℃, fan in the chamber: OFF
Condition ・AC-100V 50Hz ・Center-focused temperature in the chamber
・No load
Notice Highest,lowest attainable temperature, accuracy of temperature control
and temperature distribution differ depending on room temperature, heat
load, supply power and voltage.
3.LTI-1200E

-7-
2-4 Options
Used when using shaker, rotating incubator
and low speed magnetic stirrer in the
chamber.
For right side
For left side
Shelf board
●Shelf board for shaker
●Counter（for LTI-400E・700E、700）
Name Catalog N0.
Shelf board for
shaker 197560
Counter with caster（with adjuster attached）
Model Catalog N0.
HSS-43C 197530
Available model
LTI-400E
LTI-700E
LTI-700
LTI-1200
LTI-1200E 210440
●Carriage（for LTI-400E・700E and 700）
Carriage with caster (with adjuster attached).
Used when installing the unit on the floor or
piling two LTI-400E's
Name Catalog N0.
Carriage 210500
●Clamp for piling two models (for LTI-400E)
Clamp used for piling two LTI-400E's.
Name Catalog N0.
Clamp for piling
two models 210480
●Fluorescent lamp（for LTI-400E・700E・1200E）
10W Fluorescent lamp. It can be set in the
ceiling of chamber and useful for checking the
condition of sample in the dark.
Name Catalog N0.
Fluorescent lamp 210490
●Fluorescent lamp unit（for LTI series）
Peforms day-and-night operation with appropriate illuminance while
culturing alge, growing plant and insect.
Illuminance：Approx.3000Lx〜
（In the middle of the chamber, temperature in the chamber: 25℃,
fluorescent lamp:10W×4）
Program: 24hrs.（2 step）
Digital
Available temperature range: 5〜40℃
（Chilling temperature differs depending on model.）
Model Catalog N0.
LU-1000 210430
※It is not available for LTI-2000.
●Output terminal for recorder（for LTI-400E,
700E and 1200E）
Outputs measured temperature at DC30mV per 1℃.
Output range: DC1〜4V（Temperature range-20〜＋80
℃）
Name Catalog N0.
Output terminal for
recorder 210460
●Output terminal for alarm（for LTI-400E・700E and
1200E）
Outputs abnormal condition of the unit by contacting
point when safety feature works.
Capacity of contact point：AC250V/DC30V 3A
Name Catalog N0.
Output terminal for
alarm 210470
When using fluorescent lamp or fluorescent lamp
unit, which are optional accessories, some shelf
boards from the top are not available.

-8-
2-5 Descriptions
LTI-400E・700E Powerswitch
Bath
Doorpacking
Residualcurrentdevice
Observingwindow
Pole
Mainsconnector
Shelfboardsupporter
Overheatprotector
Door
Handle(leftandright）
Controlpanel
Cableport
（leftandright）
Wirecondenser
cover
Overcoolprotector Switchfor
fluorescent
lamp
Outlet
※NotequippedwithLTI-700E
※AbovepictureisLTI-400E.
FUSE
PUSH
▽FUSE
PUSH
▽
Lighting AC-Outlet AC-Outlet
On
Off Max.1A Max.2A
LTI-400E・700E Switchforfluorescentlamp
Outletinthechamber
forthetoppart Outletinthechamber
forbottompart
FUSE
PUSH
▽
AC-Outlet
Max.2A
LTI-400E Outlet
Shelfboard
Controlpanel
Leftside ※LTI-400E,700Eand1200Ehave
samestructureasbelow.
・・
・・
Terminalforoutputtingalarm
(optionalaccessory)
attachment Terminalforoutputtingrecorder
(optionalaccessory)
attachment
・
・・
・
・
Hatchclipwithkeyhole
attachment(Leftandright)
Hatchclipwithkey
holeattachment
(Leftandright)
Innerdoor
Chamber
※LTI-400E,700Eand1200Ehavesamestructureasbelow.
Sensorforoverheat・cool
protector
Faninthechamber
Temperature
sensor
Observingwindow
Outletinthechamber
LTI-400EMax1A
LTI-700EMax1A
LTI-1200EMax2A
Outletinthechamber
LTI-400EMax2A
LTI-700EMax2A
※NotavailableforLTI-1200E.
Blowout
direction
forthefanin
thechamber
Switchforfluorescentlamp
Outletforthetoppartwillbeavailablewhentuningthis
switchon.
Foroutletoutofchamber

LTI-1200E
Powerswitch
Bath
Doorpacking
Residualcurrentdevice
Shelfboard
Pole
Mainsconnector
Shelfboardsupporter
Overheatprotector
Door
Handle
（leftandright）
Controlpanel
Cableport
（leftandright）
Wirecondenser
cover
Overcoldprotector
Caster×4
（withleveladjuster）
-9-
Switchforfluorescent
lamp
Observationwindow
・
・・
・
・
Hatchclipwithkey
holeattachment
(Leftandright)
Hatchclipwithkey
holeattachment
(Leftandright)
FUSE
PUSH
▽
Lighting AC-Outlet
On
Off Max.2A
Switchforfluorescentlamp(LTI-1200E)
Foroutletinthechamber
Innerdoor
Switchforfluorescentlamp
Outletforthetoppartwillbeavailablewhentuningthis
switchon.

MSゴシック
MS明朝
3-1. Control panel
㈰
㈮㈯
㉀㉂
㉃
㈺
㈱
㈹
㈪ ㈫ ㈬ ㈭
㈷
-10-
h.m
SV
PV
Alarm
Heatin
g
Auto Stop
Auto Start
℃
Run
Stop
Mode Set
▼
▲
3Description of operating portion
Defrost
1Step
Def
Over Heat
Over Cool
Power switch
㈰Turns on and off the instrument. When turning on this switch, indicator displays the
temperature of the chamber and fan in the air jacket starts working.
※1
㈪Mode key Changes timer mode. Each time you press the key, the mode changes.
Pressing this key for longer than 5 sec. while timer working, it stops timer running. ※2
Stationary operation→Auto stop→Auto start→1 step operation→24-hour operation
→ →
→
㈫Defrost switch
㈬Set key
Defrosts the condenser when pressing this switch.
Used for setting measured and setting value. Clears alarm while activating alarm.
（except over heat and cool alarm）
Stops buzzer when beeping.
㈭Upper key Available only for setting value or character. Each time you press the key, the value
increases by 0.1℃（１ min.）,and holding down the key for longer than 1 second
can increase the value continuously. ※3
When displaying the character, it changes each time you press the key.
㈮Down key Available only for setting value or character. Each time you press the key, the value
decreases by 0.1℃（１ min.）,and holding down the key for longer than 1 second
can decrease the value continuously. ※3
When displaying the character, it changes each time you press the key.※4
㈯Run/Stop key Starts and stops control.※5
㉀Over heat alarm lamp Lights up when over heat protector or over heat protection thermo stat works. Turns
off a light when the temperature in the chamber falls and continues to control
(recovers automatically).
㈷Over cool alarm lamp Lights up when over cool protector works. Turns off a light when the temperature in
the chamber falls and continues to control (recovers automatically).
㉂Alarm lamp Lights up when sensor or temperature control is in abnormal condition, or over load
on refrigeration unit, or power failure occurs, or door is open, or activating upper or
lower temperature alarm, or alarm for total operating hours occurs.
㉃Heating lamp Lights up when tuning on heater.
㈹Refrigeration unit lamp Lights up when turning on refrigeration unit.
㈺Defrost lamp Lights up when defrosting.
No. Name Function
Blower Refrigerator
Int.Defrost
24Hour Pro.
BlowerFlow
Stop
Int.
Cont.
Refrigerator Mode
㈾
㈴
㈲
㈻
㈶
㈳
○
23
○
24
○
21
○
22
○
25
○
○
○
○○

MSゴシック
MS明朝
Auto stop lamp Lights up when auto stop operation is selected.
If you switch to time display by mode switch while auto stop control is
performed, the lamp blinks.
→ →
1-step operation lamp
Indicator
Set key lamp
Time display lamp
No. Name Function
㈱
Auto start lamp Lights up when auto start operation is selected.
If you switch to time display by mode switch while auto start control is
performed, the lamp blinks.
Lights up when 1-step operation is selected.
If you switch to time display by mode switch while 1-step operation is
performed, the lamp blinks.
Displays temperature, time and descriptions of character.
Lights up when displaying temperature and time by using set key.
Temperature display
lamp Lights up when displaying temperature and blinks while the unit is
controlled (also while not measuring time).
Lights up when displaying time and blinks when measuring time.
-11-
㈾
㈴
㈲
㈻
㈶
㈳
○
23
○
24
○
21
○
22
○
25
24-hour operation lamp Lights up when 24-hour operation is selected.
If you switch to time display by mode switch while 24-hour operation is
performed, the lamp blinks.
Refrigeration unit mode
switch ※6
Selects Int.operation（auto defrosting operation) and Cont. operation（stationary
operation).
When performing Int.operation, intermittent operation will be conducted automatically
while setting temperature is 50℃or lower.
Interval defrost lamp Lights up when Int. operation（auto defrosting operation）is selected.
Blower switch ※7Turns on and off the blower in the chamber.
If you turn the switch on 「Flow」side, blower starts working, and if you turn it on
「Stop」side, the blower stops working.
Blower lamp Lights up when blower works.
※1 When turning on power switch of LTI-1200E, electromagnetic valve, which changes cooling capability, sounds.
※2 Except 24-hour operation
※3 Each time you press the key, the value increases by 0.1℃(by 1 min.). If you press and hold the key for
longer than a second, the value increases by 1.0℃(by 10 min.), and if you press and hold it for longer than 4
seconds, the value increases by 10.0℃(by 1 hour). When setting time, pressing and holding the key for longer
than 8 seconds can increase the time by 10 hours.
※4 Each time you press the key, the value decreases by 0.1℃(by 1 min.). If you press and hold the key for
longer than a second, the value decreases by 1.0℃(by 10 min.), and if you press and hold it for longer than 4
seconds, the value decreases by 10.0℃(by 1 hour). When setting time, pressing and holding the key for longer
than 8 seconds can decrease the time by 10 hours.
※5 When displaying alarm, the key clears the alarm and stops control.
（except over heat and over cool alarm）.
※6 Even in Cont. operation, long continuous operation can be performed (approx. 1-2 months), however,
it depends on use condition.
※7 When tuning the switch on 「Flow」or「Stop」side, measured temperature changes immediately.
Because the control condition differs depending on the status of the blower, the unit calibrates the
temperature automatically.

-12-
3-2．Stationary operation and timer mode
Timer mode is available in stationary operation
depending on the purpose of use. Input the setting on
control panel. Even half way of the operation, setting
temperature, time mode can be changed.
For more details about setting, please refer to
"Setting, running and stopping stationary operation"
on page 28 and "Setting, running and stopping timer
mode" on page 30.
Stationary operation
Time
Temperature
t
Time
Temperature
Time
Temperature
t
1. Stationary operation
If you set the temperature and start running the
unit, it performs continuous operation at the setting
temperature. Pressing ［Run/Stop］key can start
and stop the operation.
※Range of temperature setting ：4.0℃〜60.0℃
1. Auto stop mode
If you set the time（ｔ）and start running the unit,
it performs stationary operation for setting time after
reaching at the setting temperature (setting value for
stationary operation). After elapsing the time, it
stops controlling automatically.
2.. Auto start mode
If you set the time (ｔ） and start operation, the
unit performs stationary operation after elapsing
the time.
Timer mode
Constant number operation can be started and stopped
at the setting time of timer. Three types of timer modes are
available,
which are auto stop, auto start and 1-step operation.
Also, 24-hour cycle operation mode is available.
※1. Auto stop, auto start, 1-step operation
Range of setting time for timer: 0hr.00min.〜99hrs.59min.
※2. 24-hour cycle operation
Range of setting time for timer: 0hr.00min.〜23hrs.59min.
※Each time you press the key, timer mode changes in
order as below;
Auto Stop
↓
Auto Start
↓
1 step operation
↓
24 Hour Pro.
↓
Temp.display (all the timer mode's LED turns off a
light).
Time
Temperature
3. 1-step operation mode
After reaching at the setting temperature (T1),
the unit performs stationary operation at preset
temperature (T2) after running for setting time
(t).
T1
T2
t

-12-
Following 7 adjustment functions are available;
Calibrating displayed temperature, upper temperature limit alarm, lower temperature
limit alarm, power recovery, buzzer setting, setting timer for total operation hours,
resetting displayed total operation hours.
1. Calibrating displayed temperature
Measured temperature can be calibrated to the value of standard
temperature gauge.
※Range of setting value：-20.0℃〜20.0℃
Default setting：0.0℃
※Due to the characteristics of the product, there's a difference between
measured temperature and the temperature in the chamber.
If you would like to combine the measured temperature and the temperature
in the chamber, set the value after measuring the value of standard
temperature gauge or please refer to "How to operate the functions of
"Calibrating displayed temperature" on page 41.
2. Upper temperature limit alarm
Setting value for upper temperature limit alarm can be changed.
※Setting range of upper temperature limit alarm：0.0℃〜30.0℃
Factory default：5.0℃
3. Lower temperature limit alarm
Setting value for lower temperature limit alarm can be changed.
※Setting range of lower temperature limit alarm：0.0℃〜30.0℃
Factory default：5.0℃
4. Power recovery
Operations after power recovery can be selected.
※Selectable items after power recovery
ｃｏｎt ：The unit will be controlled after power recovery.
ｏＦＦ ：The unit won't be controlled after power recovery.
ｏｎ ：The unit will be controlled after power recovery.
If the unit is operated in timer mode, the operation will be restarted in
timer mode.
※ Factory default：ｃｏｎt
3-3．Adjustment mode
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Time
Temperature
4. 24-hour cycle operation mode
After operating up to setting temperature (T1)
for setting time, 2-step operation will be
conducted up to the temperature T2 for 24
hours. After repeating the operations for setting
time, constant number operation will be
conducted at preset temperature（T3）.
T1
T2
t
T3
24-hour
2-step Repeating operation
※ Range of setting time for timer: 0hr.00min.〜
23hrs.59min./Step
Setting range of repeating operation: 1〜99 times

5. Buzzer setting
Buzzer can be beeped when the unit is stopped
automatically in auto stop mode.
※Selectable items
oFF : NO buzzer
on : Buzzer beeps
※ Factory default：oFF
6. Time setting for displaying total operation hours
If you set the time setting for total operation
hours function, 「Alarm」lamp will light up when
the time elapses setting time. Indicator displays
「Addt」and measured temperature alternately
and the unit will be controlled.
※Setting range of displaying total operation
hours：1〜9999hrs.
Factory default：1500 hrs.
※Useful to check the timing of executing
defrosting (forced manual defrosting) or
maintenance and checkup.
7. Resetting total operation hours
If you reset the time, you can check the next
timing of defrosting (forced manual defrosting),
maintenance and checkup after resetting the time.
※Factory default：0hr.
The setting of adjustment mode can be changed even
when the unit is controlled or not controlled.
1) Press ［Set］key for longer than 5 seconds.
Indicator displays 「SnS」and the mode enters
into adjustment mode.
2) Each time you press ［▲］or［▼］key, setting
mode
changes. Choose your desired mode.
※Adjustment mode changes in order as shown in
right picture.
For more details about operation, please refer to "How
to operate adjustment mode" on page 41.
［▼］
［▲］「 SnS 」 ：Calibrating displayed
temperature
↓ ↑ ［▼］
［▲］「 AL-H 」 ：Upper temperature limit
alarm
↓ ↑ ［▼］
［▲］ 「 AL-L 」 ：
Lower temperature limit
alarm
↓ ↑ ［▼］
［▲］ 「 PoFF 」 ：Power recovery
setting
↓ ↑ ［▼］
［▲］ 「 buSE 」 ：Buzzer setting
↓ ↑ ［▼］
［▲］ 「 Ａｄtt 」 ：Displaying total operation
hour setting
↓ ↑ ［▼］
［▲］ 「 Ａｄｄｔ 」 ：Displaying total
operation hours・
reset
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※If you set the buzzer setting, buzzer will keep on
beeping when auto stop control will be
completed (when stopping control).
Pressing [Set] key can stop the buzzer.

3-4．Safety and alarm functions
This product is equipped with the following safety
features and alarm functions. If you face any trouble,
please refer to "Troubleshooting" on page 49.
Safety features
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Alarm functions
・Setting value for over heat protector is too low.
・Temperature controller, SSR or the fan in the air
jacket is impaired, which made the temperature
of over heat protector raise too high.
・Electric leakage occurs or excess current flows.
Reasons why the device works.
Operation
Safety feature Turns off the unit and cuts off the
power.
Turns off the heater when the
temperature exceeds the setting
temperature of over heat protector
and over heat lamp lights up.
Residual current device
Over heat protector
・Setting value for over heat protector is too high.
・Temperature controller, SSR or the fan in air jacket is
impaired, which makes the overcool protector lowers.
・The unit is defrosted.
Turns off the refrigeration unit when the
temperature is lower than the setting
value of overcool protector, which makes
the overcool lamp light up. The unit will
be controlled when the temperature rises.
Overcool protector
・Setting value for over heat protector is inappropriate,
which makes temperature controller, SSR or fan in
the jacket impaired and raise the temperature
（reaches up to upprox.70℃.）
Turns off the heater and over heat lamp
lights up. The unit will be controlled again
when the temperature lowers.
Over heat protecting
thermostat
Reasons why alarm is activated.Alarm display and operations
Alarm name
Upper temperature
limit alarm ・Buzzer beeps for 15 seconds.
・Control will be continued.
・Alarm display
Operating conditions
Alarm is activated when the temperature in the
chamber exceeds 「Setting temperature+setting
temperature for upper temperature limit alarm」
temporarily.
Releasing alarm
・Alarm will be released automatically when the
measured temperature is within the range of
「Setting temperature＋Setting temperature for
upper temperature limit alarm」.
・Alarm will be also released by ［Set］key.
※Setting temperature for upper temperature limit
alarm can be changed. Please refer to How to
operate upper temperature alarm" on page 42.
・Buzzer beeps for 15 seconds.
・Control will be continued.
・Alarm display
Lower temperature
limit alarm
Operating conditions
Alarm is activated when the temperature in the
chamber lowers than 「Setting
temperature+setting temperature for lower
temperature limit alarm」temporarily.
Releasing alarm
・Alarm will be released automatically when the
measured temperature is within the range of
「Setting temperature＋Setting temperature for
lower temperature limit alarm」.
・Alarm will be also released by ［Set］key.
※Setting temperature for lower temperature limit
alarm can be changed. Please refer to How to
operate lower temperature alarm" on page 43.
↑↓ Displays alternately
PV
Alarm
Heating
SV
℃
h.m
PV
Alarm
Heating
SV
℃
h.m
Defrost
Defrost
Over load relay
maintaining circuit
for refrigeration unit
Refrigeration unit performs over load
operation (over heat) or starts up,
which makes alarm lamp light up and
indicates alarm display and stops
refrigeration unit.
・Refrigeration unit performs over load operation (over
heat) or starts up.
・Heat load exceeds the capacity of cooling capability
and the temperature in the chamber rises too high.
・Ambient temperature is higher than 35℃.
・Voltage is too low.
●19.5
AL-H
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○
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○
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↑↓Displays alternately
PV
Alarm
Heating
SV
℃
h.m
PV
Alarm
Heating
SV
℃
h.m
Defrost
Defrost
●19.5
AL-Ｌ
○
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○
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・Buzzer beeps for 15 seconds.
・Control will be continued.
・Alarm display
Reasons why alarm is activated.
Alarm display and operations
Alarm name
Door alarm Operating conditions
Control gets started when the door is not closed
completely.
Releasing alarm
・Alarm can be released when door is closed
and control gets started.
・Pressing ［Set］key can stop the buzzer.
Alarm for malfunction
of temperature control
・Buzzer beeps for 15 seconds.
・Control will be continued.
・Alarm display
Operating conditions
・Temperature continues to rise for longer than 10
minutes even though displayed temperature is
higher than setting value （SSR for heater is short-
circuited).
・Temperature does not rise for longer than 10
minutes (or heater is disconnected) even though
displayed temperature is lower than setting value.
・Over heat protector or over heat protecting
thermostat worked.
Releasing alarm
・When the measured temperature is out of the
capacity of the unit, control gets restarted
automatically.
・Alarm can be also released by ［Set］key.
・Sort out the trouble if over heat protector or over
heat protecting thermostat works.
↑↓Displays alternately
・By following the setting for power
failure alarm, the unit will be
controlled or gets stopped.
・Display of continuing control
・Display of stopping control
Power failure
alarm
Operating conditions
Alarm is activated when power failure occurs
(or turning off the unit without stopping
control).
Releasing alarm
Pressing ［Set］key can release the alarm.
※Setting after power recovery can be
changed.
（Please refer to the section "How to set
power recovery setting" on page 44.
・Buzzer beeps for 15 seconds.
・Control will be continued.
・Alarm display
Operating conditions
Temperature sensor in the chamber is
disconnected.
Releasing alarm
Stop operation.
Sensor is required to be replaced.
Sensor alarm
PV
Alarm
Heating
SV
℃
h.m
Defrost
door
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○
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PV
Alarm
Heating
SV
℃
h.m
Defrost
cont
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○
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PV
Alarm
Heating
SV
℃
h.m
Defrost
PoFF
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○○
○
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PV
Alarm
Heating
SV
℃
h.m
Defrost
●19.5
○
○○
○
●
↑↓Displays alternately
PV
Alarm
Heating
SV
℃
h.m
Defrost
PoFF
●
○
○○
○
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PV
Alarm
Heating
SV
℃
h.m
Defrost
●19.5
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○
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PV
Alarm
Heating
SV
℃
h.m
Defrost
SEnS
●
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○
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↑↓ Displays alternately
PV
Alarm
Heating
SV
℃
h.m
Defrost
●19.5
○
○○
○
●

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Reasons why alarm is activated.
Alarm display and operations
Alarm name
Over load
alarm for
refrigeration
unit
Operating conditions
Refrigeration unit performs over load operation (or
started up).
Releasing alarm
・Please refer to "Troubleshooting" on page 49.
・Control will be continued.
・Buzzer beeps for 15 seconds.
・Alarm display
Watch dog ・Resets microcomputer and tries to
restart control. In case that
microcomputer does not get back to
normal operation, control gets
stopped.
・Alarm display (Not specified).
Operating conditions
Due to noise and etc, temperature controller
is in abnormal condition. Ambient temperature
exceeds 35℃.
Releasing alarm
Change the ambience and power source.
Over heat
alarm ・Stops control of heater.
（Recovers automatically when
sorting out the trouble).
・Alarm display
Over Heat
※Over heat alarm lamp lights up.
Indicator displays measured temperature,
however, other alarm may be activated.
Operating conditions
・Setting temperature of over heat protector is
low.
・Temperature controller, SSR or the fan in
the air jacket is impaired, which raises the
setting temperature of over heat protector.
・Temperature exceeds the settable range of
over heat protector, which made over heat
protecting thermostat work.（temperature
reaches around 70℃.）
Over cool
alarm
・Refrigeration unit will not be controlled.
（Recovers automatically when sorting
out the trouble).
・Alarm display
Over Cool
※Over cool alarm lamp lights up.
Indicator displays measured
temperature,
however, other alarm may be activated.
Operating conditions
・Setting temperature of over heat protector is
high.
・Temperature controller, SSR or the fan in
the air jacket is impaired, which lowers the
setting temperature of over cool protector.
Warning function
Reasons why alarm is activated.
Warning display and operations
Warning
Warning for
elapsing total
operation hours
Operating condition
・Total operation hours exceed the setting time.
Releasing warning
・Pressing [Set] key can release the warning.
・Reset total operation hours 「Addt」of
adjustment mode.
※If you've released the warning by [Set] key
and restart control without resetting total
operation hours, warning will be reactivated
(when turning on and off the unit.)
・The unit will be controlled.
・Warning display
↑↓交互表示
PV
Alarm
Heating
SV
℃
h.m
Defrost
Addt
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PV
Alarm
Heating
SV
℃
h.m
Defrost
●19.5
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PV
Alarm
Heating
SV
℃
h.m
Defrost
oVL
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PV
Alarm
Heating
SV
℃
h.m
Defrost
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