EYELA KCL-2000W User manual

Environmental Chamber
R00
取扱説明書
KCL-2000W
This manual is designed to use this unit safely with the best performance.
Be sure to read “Safety precautions carefully
before use.
Please keep this manual in a place easily accessible to every user.
Important
Tokyo Rikakikai Co., Ltd.
Instruction Manual

Safety precautions
Though we are trying to look into conceivable risk of using the product, it is very
difficult for us to expect all. It means that all the instructions in this manual do not
cover all the potential risks that may be caused by the product. However, if you follow
the instructions, you surely can handle and operate the products safely. Please use
extreme care when handling this product and try to prevent all the potential accidents
and mechanical failures.
Alert Mark
Signal word Definition
1. Signal word for warning
Any flammable material such as organic
solvent cannot be contained in this unit.
Also, due to its functions and characteristics,
some parts of this unit subject to high
temperature. If you touch them carelessly,
you may get burned unexpectedly.
This manual shows precautions for your
safety to prevent careless injuries.
They are classified and defined according to
their risk, and indicated with an alert mark
and a signal word.
Please follow these instructions.
Warning Mishandling the product may cause users serious personal
injury or loss of life.
Caution Mishandling the product may injure users or cause
property damage.
Dangerous Mishandling the product will cause users serious personal
injury or loss of life.

2. Warning display on the product
For highly 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.
* If you have any trouble reading the label because of
damage and etc., please replace with new one.
Please contact us if you require new label.
Do not touch the
cooling fin with
your bare hands.
Edgy fin may cause
you physical unjury.
Caution Dangerous
Do not put any
explosive
materials such as
organic solvent .

Check the type and quantity of each part.
Contents
Items contained in
your packing
1. For safety use ........................................
2. Outline
2-1 Application ............................................
2-2 Specifications ........................................
2-3 Heating and cooling data .......................
2-4 Optional accessories ...............................
2-5 Name of each part....................................
3. Name and functions of the control panel
3-1 Control panel ...........................................
3-2 Operation keys and operating key indicator ...
3-3 LCD panel and LED indicator ...............
3-4 Overview of operation .....……................
3-5 Safety and alarm functions …................
4. Installation
4-1 Installed environment...............................
4-2 Environmental conditions .......................
4-3 Installation ...............................................
4-4 Installation .........................................…..
4-5 Utility connection ...............................
1
1
2
5
6
7
8
9
11
12
15
18
18
19
20
21
Shelf
Contents KCL-
2000W
2
3
1
4
6
Main unit
7
Model
1
2
1
1
Shelf
Bracket Right
Silicon stopper
1
8
External water tank
5Plate for fixing rack for external
water tank
Rack for external water tank
9
1
This instruction manual describes the procedure
of installation, operation, troubleshooting,
maintenance / check-up, and disposal for
Environmental chamber
KCL-2000W.
Please read this manual carefully before use.
Instruction manual
10
11
12
14
16
17
1
5
1
Wet-bulb wick
Drain hose
Dropper
15
Grounding adapter
Washing brush 1
Screw
Water-supply hose set
Water-supply hose
Alarm output connector
13
Leaflet on panel key operation
18
1
1
1
1
Introduction
Thank you for purchase of
Besides this instruction manual, we have
enclosed the leaflet on panel key operation,
which explains the procedure for making
operation program with panel key.
Please refer to it if needed.
5. Operation
5-1 Preparation ....................................
5-2 Operation ................................…...
6. Troubleshooting ....................................
7. Maintenance and check-up
7-1 Operation test for residual correct device....................
7-2 Cleaning and caring the product......
8. Disposal of unit ....................................
9. After-sales service ...............................
22
31
35
42
42
46
46
Bracket
Left Right
Connect to ground
Grounding adaptor
100V only
2
2
Contents KCL-
2000W
Model
1
2
Left
• Shelves and brackets are fixed to
the chamber with adhesive tape
19
20
CD-ROM Communication
software
1
1
1
RS-232C communication cable

- 1 -
1
This unit is not designed with explosion-proof structure.
Use extreme care when handling it.
For safety use
Do not put any inflammable materials such as
organic solvent into the chamber.
While operating the unit in high temperature,
sample in the chamber may vaporize, catch
fire and explode. Inflammable materials are
nitrates, nitro compounds, etc. and explosive
materials are chloride peroxides, inorganic
peroxides, salt nitrates, organic solvents etc.
This unit is not designed with explosion-
proof structure.
Dangerous
Caution
Do not touch the cooling fin with
your bare hands.
The cooling fin is very sharp.
Do not touch it with your bare hand on the
occasion of maintenance of the unit to avoid
injury of your hand.
2
2-1 Use application
Outline of the product
Warning
Do not remodel the product.
Do not use it out of specified applications.
Remodeling or using the product out of specified
applications may cause electric shock or malfunction.
This unit is an environmental chamber used
for various tests such as humidity test and
insulation performance test of electric parts,
corrosion test of metal parts or drugs and
medicines field etc under controlled
temperature and humidity.
Cooling fin

- 2 -
2-2 Specifications
Product
Model
Air flow system
Dry-bulb temperature sensor
Heater
Environmental chamber
Forced air flow
-15～+85℃/25～98％RH Minimum unit 0.1℃/0.1％RH
P.I.D. control by a microprocessor
Platinum temperature measuring resistor Pt100Ω
Digital setting through the membrane switch
KCL-2000W
・Normal mode：Automatic control by microprocessor (Interval defrosting mode)
・Manual mode (Manual start, Automatic stop/Manual stop)
1.Auto-start program (1 min.～99 days 23hr. 59min.)
2.Auto-stop program (1 min.～99 days 23hr. 59min.)
3.User’s program (7 patterns)
・1 pattern：contains Max. 10 segments, 1 min.～99 days 23hr. 59min./1 segment
・Repetition time of program：1～999 times or endless
・Program type：Target precedence control of temperature and humidity, Step control,
Gradient control
Stainless steel sheath heater 650W（SUS304)
Refrigeration unit, Coolant Air-cooled type 200W Coolant : R-134a
Within ±0.5℃/±3％RH *2
Within 4℃/12％RH *2
Digital readout Minimum unit 0.1℃/0.1％RH
・Set/Measured temperature, Set/Measured relative humidity, Total time (1 min.～999 days
23 hrs. and 59 min.)
・Graphic display (Switch-over)
Residual current device and excess current breaker, Door switch
Stand-alone over heat protector (Variable type +30～+93℃)
Stand-alone over heat protector for boil-dry protection
Self-diagnosis system of temperature controller
(Dry-bulb temperature sensor failure, Wet-bulb temperature sensor failure, Heater fault,
Refrigeration unit fault (High pressure, Overload), Temperature curve failure, Power failure,
Overheat, Overcool, Cooling failure, Level sensor fault, Humidity control failure, Humidity
upper limit fault, Water supply failure, Low level of water supply tank, Door open, Watch dog,
SSR fault, Full drain tank (when using an optional drain tank))
・RS-232C interface
・Recorder output terminal for temperature and humidity
・Alarm output terminal (Contact voltage type)
・Calibration of temperature indication ・Maintenance mode
・External water supply ・Forced draining ・Input terminal for drain tank alarm
Wet-bulb temperature sensor Platinum temperature measuring resistor Pt100Ω
Heater for humidifying Stainless steel sheath heater 200W×2（SUS316)
Interior Antibacterial stainless steel sheet Others: SUS304
Temperature controller P.I.D. control by microprocessor, Noncontact zero cross
Chamber capacity
Shelf
Shelf size
Chamber dimensions *3 Approx. 140Ｌ
500W×400D×700H (mm)
Max.15kg/shelf under uniform loading Supplied shelves : 2 pce. as standard with 2 brackets
468W×375D (mm)
Pitch of bracket holder /
No. of columns 40mm pitch 5 levels/2 columns
Door With observation window (without inner door)・Quadplex glass・
Equipped with heater for reducing dew condensation, no double door
Temp./Humidity
control range *1
Temp./Humidity
control accuracy *1
Temp./Humidity
uniformity *1
Temp./Humidity control
Temp./Humidity setting
Temp./Humidity indication
Defrosting system *2
Program
Other functions
Safety features
Overload relay holding circuit, Protection timer for ref. unit, High pressure switch for ref. unit.
Cable port 2 ports at both sides of unit ID40mm
Supplying water Distilled water or ion-exchange water through a polyethylene tank or a cartridge water purifier
Electric conductivity : 10µs/cm or less
Tank capacity Inside : Approx. 10L (Removable) Outside : Approx. 20L (connected by one-touch socket)

- 3 -
Model
Overall dimensions *3
Power input
Rated power source
Net weight *4
5 ～35℃
15A 1.5kVA
AC100V 50/60Hz
Range of available temperature
635W×755D×1695H mm
153㎏
KCL-2000W
Recorder output Measured temperature : DC1mV/ ℃Measured humidity : DC1mV1％RH
Alarm output Contact capacity AC250V 5A Normal : OFF Abnormal : ON
Drain port Nozzle OD 11×ID7 mm
*1
*2
*3
*4
*
The above performance has been obtained under conditions of 20℃of room temperature, rated power
source voltage, and without load.
The performance is indicated in conformity with JTM KO1-1998 (Testing method and indication form
for constant temperature and humidity bath by Japan Testing Machinery Association).
If the unit is operated at 30～40℃or lower temperature for a long time (one day～one week or longer),
please set “interval defrosting operation” for the operation.
The chamber temperature will go up by about 3℃, and the chamber humidity increase by about
20%RH, when the defrosting mode works under room temperature 20℃.
Actual changes of such temperature and humidity differ depend on actual operating conditions.
The chamber dimensions and overall dimensions without external tank do not include any projections.
The net weight includes external tank part and rack frame.
If the rack is not used, the net weight is about 127kg.
The required time to heat and cool, and to humidify, temperature and humidity control accuracy, and
temperature and humidity uniformity doffer depend on the environmental temperature, power source
voltage, with load or without load.

- 4 -
Humidification control range
0 20 40 60 80 100
0
20
40
60
80
100
Temperature (℃)
Relative humidity (％) RH
(1) 20℃room temperature, unloaded condition
*1
*2 The accuracy of temperature control differs depends on the environmental conditions such as load condition.
If the unit is operated at 30～40℃or lower temperature for a long time (one day～one week or longer), interval
defrosting operation must work. The temperature in the chamber is raised about 3℃, and the humidity in the
chamber is raised about 20%RH, when the defrosting mode works under 20℃of room temperature.
These variation differs depends on actual operating conditions.

- 5 -
2-3 Heating and cooling data
・AC-100V 50Hz
・Unloaded condition
Note; The maximum temperature and required time to heating differs depend on the
environmental temperature, power source voltage, with load or without load.
-20
-10
0
10
0 10 20 30 40 50 60 70 80 90
20
35℃RT
20℃RT
30
40
50
60
70
80
0 5 10 15 25 50
Time (min.)
Temp. (℃)
30 35 40 45
90
20
20
* Without humidification control
(1) 20℃room temperature, Cooling curve (85→20℃)
(2) 20/35℃room temperature, Cooling curve
Temp. (℃)
* Without humidification control
Time (min.)

- 6 -
2-4 Optional accessories
●Drain tank
Description
Cat. N0.
Drain tank
204960
30
40
50
60
70
80
0 10 30 40 60 70
90
20
20
10
0
-10
-20
50
(3) 20
℃
room temperature
Time (min.)
Temp. (℃)
* Without humidification control
(Refrigeration unit is OFF.)
If 10L capacity drain tank is full (option), the
unit indicates alarm message and stops
temperature and humidity control.
The tank cannot be used when the unit is placed
on the floor without using a rack.
Use the drain tank in a place where is 310mm
lower than the unit.

- 7 -
2-5 Name of each part
KCL-2000W
Power switch
Chamber wall
Door packing
Residual current device
Shelf
Bracket holder
Mains connector
Bracket
Over heat protector
Door
Handle
(right & left)
Fan
Control panel
Suction port / Humidification
tray (bottom)
Cable port (right & left)
Observation window for
humidification tray (top)
Observation window for frost
Water-supply plug
Drain nozzle
Level adjuster (4 ea.)
Caster
(4 casters, w/level adjuster)
Airflow orifice
RackBottom plate
Frost receiver
Dry-bulb temperature sensor
Wet-bulb wick
Wet-bulb temperature sensor
Wick holder
Temperature Humidity Alm.Out Com
Recorder output
terminal for temperature
Alarm output terminal RS-232C interface
Control panel
Left side view
Airflow cover
Recorder output
terminal for humidity
Observation
window

- 8 -
Descriptions and function of control panel
3-1 Control panel
①
② ③④⑤
3
Power switch
①Turns on and off the unit.
②Over heat protector
No. Description Function
Run
Stop
Pause
Key
Lock
Int.
Defrost
Advance
Water
Supply
Defrost
Mainte.
Manual
Drain
Screen
Mode
Copy
Clear
9
6
3
Enter
8
5
2
-/.
7
4
1
0
I
O
Empty
Full
○
○
○
○
○
○
Tank Water Level
Temp.Heater
Humi Heater
Refrigerator
Defrost Running
Normal Mode
Program Mode
○Alarm ▲
Over Heat
３０
４０
５０６０ ７０
８０
９０
▼
Power switch
Operation key
LCD panel
LED indicator
Control volume of
Over heat protector
You can set any value for over heat protector within the range from 30 to
90℃through this volume switch.
Set the over heat protection value 10℃higher than the set up value when the
temperature is between the setup value and 80℃. f the setup temperature is
higher than 80℃, turn the control volume clockwise fully (93℃) to be the
maxim.
* When the chamber temperature reaches to the protection value, the alarm
message [TH] is indicated on the LCD panel and the control operation stops.
○ ○ ○
○
○○○

- 9 -
3-2 Operation keys and key lamps
⑦
⑧⑨
⑩
⑪
⑫
⑬
Run
Stop
Pause
Key
Lock
Int.
Defrost
Advance
Water
Supply
Defrost
Mainte.
Manual
Drain
Screen
Mode
Copy
Clear
9
6
3
Enter
8
5
2
-/.
7
4
1
0▲
▼
○
① ② ③
④⑤ ⑥
⑭
⑮ ⑯
⑰
⑱
⑲⑳
○ ○
○
○ ○ ○
Numeric keypad
[0]～[9] key
①Used for entering a value.
②[Screen] key
(Graphic indication key)
③[Mode] key
(Program selection key)
④
Selects [Normal mode] or [Program mode].
⑤
⑥Inputs and enters each setting data and selects input mode.
No. Description Function
The display is changed from [Set/Measured value indication]→[Temperature
graphic indication]→[Humidity graphic indication] in order in user’s program
No.3～11.
[Copy] key
(Copy function key) When setting user’s program No. 3～11, previous segment of setup
temperature and humidity can be copied. (The time cannot be copied.
In the segment 0 this function does not work.
[-/.] key If you press this key before inputting the value, [-(minus sign)] is entered, and
if you press in the middle of the value, [.(decimal point)] is entered.
[Enter] key
⑦
[Run/Stop] key
⑧
[Clear] key
(Clear key)
[Run/Stop] key lamp
⑨
⑩[Pause] key
(Pause key)
⑫
⑪[Pause] key lamp
[Key Lock] key
(Operation key lock function)
⑬[Key Lock] key lamp
21 23 22 24
Clears the input data and releases alarms.
* Some alarms cannot be released by this key.
(Refer to the chapter [Releasing alarm] on P.17.)
Also you can clear all the data of the selected programs if you select one
program displayed by [Mode] key.
Holding down this key for more than 1 second (for preventing wrong
operation) can start and stop the control.
Lights up while controlling.
If you press this key while operating the temperature, humidity and gradient control in
constant temperature control of user’s program No.3～11., the measured temperature
and humidity at that time are maintained. If you press the key once again, [Pause]
function is released and re-starts the control from the segment that was interrupted by
pause function.
Lights up while the pause function is active.
Holding down this key for more than 3 seconds (for preventing wrong operation)
can lock all the keys, which makes all of the key operations unusable. If you
press the key once again for more than 3 seconds, the [Key Lock] function is
released.
Lights up while operation keys are locked.

- 10 -
Description
No. Function
⑭[Int.Defrost] key
(Automatic defrosting )
Turns ON/OFF the defrosting operation.
(If you turn on the function, the intermittent automatic defrosting operation is
executed when the set temperature is 40℃or lower.
While operating, Defrost Running lamp illuminates.
⑮[Int.Defrost] key lamp
⑯
⑱
[Advance] key
(Forced advance of segment)
⑰[Water Supply] key
(External water supply)
[Water Supply] key lamp
⑲
⑳
[Meinte.] key
(Maintenance mode)
[Defrost] key
(Forced defrosting)
[Defrost] key lamp
[Manual Drain] key
(Forced draining)
[Manual Drain] key lamp
Cursor key
[▲][▼][ ][ ]
21
23
22
24
Lights up when the Automatic defrosting mode is selected.
If you press this key while operating any user’s program No.3～11, the
operation is proceeded to the next segment by compulsion.
Water is supplied to the inner tank from the outer tank by this key.When the
inner tank level reaches to the level 1 (low level), water is supplied
automatically from the outer tank, and when the level reaches to 3, watar
supply stops.
* This key function does not work while draining by [Manual Drain] key.
Lights up when the water supply is active.
Turns ON/OFF the forced defrosting operation.
If you press this key while the control operation stops or runs, forced defrosting
operation starts to work (Defrost Running lamp illuminates).
When the defrosting operation is completed, it stops automatically or re-starts control
operation that was interrupted (Defrost Running lamp turns off a light).
Lights up when the forced defrosting operation is active.
Changes the operation to the maintenance mode.
Sets temperature and humidity adjustment function, and measures and
displays the time for humidification tray, wet-bulb wick,and condenser filter,
which are required maintenance.
Used for forced drainage for humidification tray (top and bottom) and wet-bulb
wick tray. While executing forced draining, the humidification control and
water supply are stopped.
Lights up when the forced draining operation is active.
Pressing the key can move the cursor [ ] from right to left or up and
down.

- 11 -
3-3 LCD panel and LED indicator
LCD panel
①Displays the setting of temperature, humidity and time, measured data
(Numeric indication and graphic indication), and alarm messages.
②Tank Water Level indicator
Empty～Full
③Temp. Heater lamp
(Temperature heater lamp)
④
⑤
⑥
Humi. Heater lamp
(Humidification heater lamp)
Refrigerator lamp
(Refrigeration unit lamp)
⑦
⑧
Normal Mode lamp
⑨
Empty
Full
○
○
○
○
○
○
Tank Water Level
Temp.Heater
Humi Heater
Refrigerator
Defrost Running
Normal Mode
Program Mode
○Alarm
①②
③
④
⑤
⑥
⑦
⑧
⑨
Defrost Running lamp
(Defrosting operation lamp)
Program Mode lamp
Alarm lamp
Screen
Mode
Copy
Clear
9
6
3
Enter
8
5
2
-/.
7
4
1
0
Description
No. Function
The water level of inner tank is indicated on a scale of one to four. When the
level is normal, the green lamp illuminates. When the level is low, the red
[Empty] lamp illuminates. (See [Humidification procedure] on P.33.)
Lights up when the temperature heater is active.
Lights up when the humidity heater is active.
Lights up when the refrigeration unit is active.
Lights up when either forced defrosting or automatic defrosting operation is
active.
Lights up when the normal mode is active.
Lights up when the program mode is active.
Lights up when any of alarm is activated.

- 12 -
3-4 Overview of operation
Program mode
1. Program 1 (Auto start program)
You can set a temperature, humidity and time of
onset. After the setting time elapses, operation
starts and continues at the set temperature.
* Time setting range : 1 minute～99 days 23
hours 59 minutes.
Normal mode
・Set-point control operation
* Temperature setting range -15.0～85.0℃
(Input range -20.0～90.0℃)
Humidity setting range 25.0～98.0％RH
(Input range 0～98.0％RH)
・Program and normal mode share the same temperature setting range.
・Refer to the humidification control range on P.4 to
set humidity value.
・Although the humidity input range is 0～98.0％RH,
the actual control operation starts form 2%RH.
Time
Temperature
Humidity
Temperature
Humidity
Time
Temperature
Humidity
Temperature
Humidity
Set time
Time
Temperature
Humidity
Temperature
Humidity
Set time
Two operation modes, which are normal and program
mode, are available. In program mode, there are five
patterns of program from No.1 to 11.
For more detail about the setting procedure, please
refer to the key operation manual.
After setting a temperature and starting the operation,
the unit controls the temperature at the set point.
2. Program 2 (Auto stop program)
You can set a temperature, humidity and stop
time. After the setting time elapses, operation
stops.
* Time setting range : 1 minute～99 days 23
hours 59 minutes.

- 13 -
3. Program 3～9 (User’s
program)
(1) Target temperature precedent control
When you set the time [00:00] , the operation
is continued until the temperature
reaches to the target point ±0.3℃being
independent of the time.
Seg 0 1 2 3 4 5 6 7 8 9
Time
Temperature
Humidity
Set the time
[00:00]
Target temperature
(Set value)
Seg 0 1 2
Seg 0 1 2 3 4 5 6 7 8 9
You can set a temperature, humidity, time
and repetition times to operate the program.
One user’s program is composed of 10
segments (Seg. 0～9) and you can set a
temperature, a humidity and a time to each
segment.The repetition time can be set
previously to each user’s program No. 3～9.
* Time setting range : 1 minute～99 days
23 hours 59 minutes.
The operation starts under
(1) Target temperature precedent control,
(2) Target humidity precedent control, or
(3) Time precedent control
depending on the time setting.
Time
Temperature
Humidity
Temperature
Humidity
One pattern consists of 10 segments.
Temperature
Humidity
(2) Target humidity precedent control
When you set the time [00:00] and change the
target humidity without changing the target
temperature, the operation is continued until
the temperature reaches to the target point
±0.3℃being independent of the time.
The time is set. Time
Gradient control
Temperature
Humidity
(3) Time precedent control
When you set a time within the setting range
1 minute～99 days 23 hours 59 minutes, the
gradient control is executed. The gradient rate
is resulted from that the difference between the
previous set value and the current set value is
divided by the set time.
* The segment 0
Temperature
Humidity
Temperature
Humidity
This program consists of 10 segments.
4. Program 10 (Auto start and user’s program)
You can set an user’s program (including 10
segments, repetition times) and the time of
onset. start delay time. When the time of
onset elapses, the setting user’s program is
started.After the program is repeated as you
set, it stops automatically.
* Time setting range : 1 minute～99 days
23 hours 59 minutes.

- 14 -
5. Program 11 (Combination program)
Graphic indication
70
0
35
0 2 4 6 8 S
35.0℃ Pro 3
Maintenance mode
MAINTENANCE MODE
1.Temp.Cal 0.0 ℃
2.Humi.Cal 0.0 ％RH
4.Wet-Bulb wick 12345 h
5.C.Filter 12540 h
6.Total Run Time 14567 h
You can combine some user’s programs (No. 3～
9) and set the repetition times.
Normal control can be combined at the end of the
combination program.
* 6 programs (including normal) can be
combined as a maximum.
* The setting of the repetition times for each
user’s program (No . 3～9) becomes void, and
you can set the repetition times for whole of
combined programs.
70
0
35
0 2 4 6 8 S
35.0℃ Pro 3
Temperature graphic screen
The settings and control status of user’s
program can be check visually by a graphic
indication. Temperature and humidity is
switched over.
This function is available for use’s programs
(No . 3～9), and the screen is switched by
[Screen] key.
Maintenance mode screen
Temperature and humidity indication calibration
can be set. Also, this mode measures and
displays the time for humidification tray, wet-
bulb wick,and condenser filter, which are
required maintenance work, and measures and
displays total operation time of unit.
If you reset the time to zero after completing the
maintenance work (cleaning or replacing the
part) , it is useful to estimate the next
maintenance timing.
Press [Mainte.] key to change to the
maintenance mode.
* Calibration of temperature indication (Temp.Cal) : ±10℃
Calibration of humidity indication (Humi.Cal) : ±10%RH
You can calibrate the indicated value within the above range.

- 15 -
Alarm message is indicated with flashing at
part of LDC panel .
When several alarms occur simultaneously, 4
alarms can be indicated with in order of
precedence.
3-5 Safety and alarm function
Safety function
Alarm function
Temp 19.5
Total Time 003/09:28
19.5℃
Alarm indication in Normal mode
Humi 80.0 80.0％RH Temp 23.5
Total Time 003/09:28
23.5℃
Humi 70.0 70.0％RH
Pro 3
Seg 4
Repeat 2 001/10:18
SET MEAS
SET MEAS
This unit has safety and alarm functions
as below. When you face the trouble, please refer to
[Troubleshooting] on P.35 and follow the
instructions.
Safety device Function Cause
Over heat protector
for temperature
inside the chamber
Turns off to shut down the power. Electric leakage or excess current occurs.
When the temperature inside the
chamber exceeds the setting
temperature for over heat protector,
the alarm message[TH] is
displayed with flashing and all
control operations are stopped.
Mains switch - The setting temperature for over heat protector is
too low.
-Due to some trouble of temperature controller,
SSR or chamber fan, the temperature inside the
chamber exceeds the alarm temperature
Boil-dry protector
for humidification
tray
When the top and bottom
humidification tray are empty, the
alarm message [TH1] (for top) and
[TH2] (for bottom) are indicated with
flashing and all control operations are
stopped.
- The humidification tray is not supplied water.
- Low water level of the tray.
-Due to some trouble of temperature controller or
SSR, temperature inside the chamber exceeds
the alarm temperature
Overload relay
holding circuit for
refrigeration unit
When the refrigeration unit works
under overload (overheat) or start-up,
the alarm message [OLR] is
indicated with flashing and all control
operations are stopped.
-The refrigeration unit works or starts up under
overload (overheat) .
-Due to overheat operation exceeding the cooling
capacity, temperature inside the chamber rises
abnormally.
- The environmental temperature exceeds 35℃.
- Low voltage
High pressure
switch for
refrigeration unit
When the refrigeration unit works
under high pressure and the
pressure value exceeds its upper
limit, the alarm message [HP] is
indicated with flushing and all control
operations are stopped.
- The refrigeration unit works under
overload (overheat).
-Due to overheat operation exceeding the cooling
capacity, the temperature inside the chamber rises
abnormally
- The environmental temperature exceeds 35℃.
- The fan motor for condenser breaks down.
Alarm indication in Program mode
Some alarm functions continue to control or
stop the control operation depending on its
significance of the cause.
The unit is incorporated the watch-dog system
which detects crash of CPU and resets the
circuit by self-diagnosis.

- 16 -
Alarm name
Overheat
protection alarm
for chamber
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [TH] flashes.
The overheat protector for chamber works.
Overheat protection
alarm for top
humidification tray
Alarm message Cause
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [TH1] flashes.
The overheat protector for top humidification
tray works.
Overheat protection
alarm for bottom
humidification tray
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [TH2] flashes.
The overheat protector for bottom
humidification tray works.
Overload alarm for
refrigeration unit
High pressure
alarm for
refrigeration unit
SSR alarm for
temperature
controlling heater
SSR alarm for
humidity controlling
heater
(Top/Bottom)
Disconnection
alarm for
temperature
controlling heater
Disconnection
alarm for humidity
controlling heater
(Top/Bottom)
Sensor fault alarm
for dry-bulb
temperature sensor
Sensor fault alarm
for wet-bulb
temperature sensor
Door alarm
Low level alarm for
water supply tank
Level sensor fault
alarm for water
supply tank
Water supply alarm
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [OLR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [HP] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [SSR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [HSSR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [HTR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [HHTR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [SNS1] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [SNS2] flashes.
The overload relay for refrigeration unit
works.
The high pressure switch for refrigeration
unit works.
The SSR (noncontact relay) breaks down
which turns on and off the temperature
controlling heater.
The SSR (noncontact relay) breaks down
which turns on and off the humidity
controlling heater.
The temperature controlling heater is
disconnected.
The humidity controlling heater
(Top/Bottom) is disconnected.
The dry-bulb sensor is disconnected or
short-circuits.
The wet-bulb sensor is disconnected or
short-circuits.
The door is opened while controlling.
- Buzzer sounds for 1 second.
- Chamber fan, temperature and
humidification heater are stopped.
- The alarm message [DOOR] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [TANK] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [TKSN] flashes.
- Buzzer sounds for 15 seconds.
- All operations are stopped.
- The alarm message [FLW] flashes.
The inner tank level is left being empty for
10 minutes.
The level sensor of inner tank breaks down.
Even if water is supplied by a pump, water
cannot be pooled in the humidification tray
(top/bottom) and wick holder.