Etac HIFLEX NEO Operation Manual

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Page 1

T e m p e r a t u r e ( H u m i dity) C h a m b e r

Operation Manual

Temperature and Humidity Test Chamber

Main body / Maintenance

Issued on oct.29, 2012 (5th edition)

Page 2

Preface

- NOTE -

The “lot No.” is also indicated on the lower right of the front panel of the chamber.

When contacting us regarding a chamber, please remember to provide us

with the “Lot No.” as well.

Thank you very much for purchasing our HIFLEX NEO series Temperature (Humidity)

Chamber. This NEO series was developed utilizing ETAC's original

technologies and taking the current market trends into consideration. We

believe that this series will meet your various needs. In order to use all

functions of this product effectively, correctly, and safely, please first read

this operation manual carefully to fully understand the features and operation

methods.

This manual contains information on all HIFLEX NEO series products. Please collate

information based on your purchased model.

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INDEX

■ FOR SAFE USE .......................................................................................................................6

● OUR WARNING LABELS ...........................................................................................................6

● PLEASE OBSERVE THE FOLLOWING INSTRUCTIONS FOR SAFETY ................................................7

■ IMPORTANT INSTRUCTIONS .................................................................................................. 11

● INSTALLATION ENVIRONMENT ............................................................................................... 11

● PRECAUTIONS FOR HANDLING SPECIMENS ............................................................................ 14

● HANDLING INSTRUCTIONS .................................................................................................... 16

● OPERATING INSTRUCTIONS .................................................................................................. 18

● PRECAUTIONS FOR DISPOSAL ............................................................................................... 20

■ LIST OF STANDARD ACCESSORIES ........................................................................................ 20

■ NAME OF PARTS .................................................................................................................. 22

■ PREPARING FOR OPERATION ............................................................................................... 23

1. INSTALLING THE CHAMBER ..................................................................................................... 23

2. PREPARING HUMIDIFICATION WATER (FX TYPE) ...................................................................... 23

3. CONNECTING DRAIN HOSES ................................................................................................... 24

4. CONNECTING THE POWER ..................................................................................................... 25

5. STARTING AN OPERATION ...................................................................................................... 26

■ ADDITIONAL FUNCTIONS ...................................................................................................... 27

● INTERLOCK .......................................................................................................................... 27

● EXTERNAL OUTPUT TERMINAL ............................................................................................. 28

● LAN CONNECTOR ................................................................................................................ 29

● USB CONNECTOR ............................................................................................................... 29

● HUMIDIFICATION VAPOR RECOVERY SYSTEM ......................................................................... 30

■ OPERATING FUNCTIONS ............................................................................................... 31

● LOCAL/REMOTE CONTROL OPERATION .................................................................................. 31

● DISPLAYING THE STATUS OF EQUIPMENT/INSTRUMENT ........................................................... 34

● ERROR NUMBERS ................................................................................................................ 36

● ABOUT SETTING OF UPPER AND LOWER TEMPERATURE LIMITS ................................................ 39

● SETTING OVERHEAT PROTECTOR (FOR THE PROTECTION OF SPECIMENS) ............................... 39

■ HOW TO RESET ERROR/ALARM ............................................................................................ 40

● ERROR/ALARM RESETTING PROCEDURES .............................................................................. 40

● RESUMING AN OPERATION AFTER RESETTING ERROR/ALARM................................................ 40

■ DEFROSTING METHOD ......................................................................................................... 41

● ABOUT FROST FORMATION ON THE CHILLER .......................................................................... 41

● CHECKING FROST FORMATION .............................................................................................. 41

● HOW TO DEFROST ............................................................................................................... 41

● WHEN ER01 IS DISPLAYED ................................................................................................... 42

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● WHEN ER04 IS DISPLAYED ................................................................................................... 43

● WHEN ER06 IS DISPLAYED ................................................................................................... 45

● WHEN ER11, 12, OR 13 IS DISPLAYED .................................................................................. 48

● WHEN ER15 OR 16 IS DISPLAYED ......................................................................................... 49

● WHEN ER18 OR 19 IS DISPLAYED ......................................................................................... 50

● WHEN ER21, 22, OR 23 IS DISPLAYED .................................................................................. 51

● WHEN ER27 IS DISPLAYED ................................................................................................... 53

● WHEN ER31 IS DISPLAYED ................................................................................................... 54

● WHEN ER32 IS DISPLAYED ................................................................................................... 55

● WHEN ER41, 42, OR 43 IS DISPLAYED .................................................................................. 56

● WHEN ER45 IS DISPLAYED ................................................................................................... 57

● WHEN ER47 IS DISPLAYED ................................................................................................... 58

● WHEN ER49 IS DISPLAYED ................................................................................................... 60

● WHEN ER51 IS DISPLAYED ................................................................................................... 63

● WHEN ER56 IS DISPLAYED ................................................................................................... 64

● WHEN ER57 IS DISPLAYED ................................................................................................... 65

● WHEN ER60 IS DISPLAYED ................................................................................................... 65

● WHEN ER61 IS DISPLAYED ................................................................................................... 66

● WHEN ER99 IS DISPLAYED ................................................................................................... 66

● WHEN AL26 IS DISPLAYED ................................................................................................... 67

● WHEN AL45 IS DISPLAYED ................................................................................................... 68

● WHEN AL47 IS DISPLAYED ................................................................................................... 69

● WHEN AL48 IS DISPLAYED ................................................................................................... 70

● WHEN AL49 IS DISPLAYED ................................................................................................... 71

● WHEN AL50 IS DISPLAYED ................................................................................................... 73

● WHEN AL52 IS DISPLAYED ................................................................................................... 74

● WHEN AL72 IS DISPLAYED ................................................................................................... 75

● WHEN AL73 IS DISPLAYED ................................................................................................... 76

● WHEN AL75 IS DISPLAYED ................................................................................................... 78

● WHEN AL84 IS DISPLAYED ................................................................................................... 79

● WHEN AL86 IS DISPLAYED ................................................................................................... 79

● TROUBLESHOOTING PROBLEMS WITHOUT ERROR/ALARM DISPLAY .......................................... 80

◇ CHAMBER OPERATION DOES NOT START BY PRESSING THE RUN/STOP BUTTON. ................... 80

◇ TEMPERATURE DOES NOT RISE DURING THE TEST. ................................................................ 80

◇ TEMPERATURE DOES NOT RISE............................................................................................. 80

◇ TEMPERATURE AND HUMIDITY DO NOT DECREASE DURING THE TEST. ..................................... 80

◇ WINDOW LAMP DOES NOT LIGHT UP. ..................................................................................... 80

◇ CONDENSATION OR CLOUDING OCCURS ON THE SURFACE OF VIEWING WINDOW. ..................... 80

◇ USE OF THE HUMIDIFICATION WATER IS EXTREMELY LARGE. ................................................... 81

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◇ THE EARTH LEAKAGE BREAKER TRIPPED. .............................................................................. 81

■ MAINTENANCE AND INSPECTION ........................................................................................... 83

○ CHECK POINTS FOR 1ST MONTH INSPECTION .......................................................................... 83

○ CHECK POINTS FOR 3RD MONTH INSPECTION .......................................................................... 84

○ CHECK POINTS FOR 6TH MONTH INSPECTION .......................................................................... 85

○ CHECK POINTS FOR 1ST YEAR INSPECTION ............................................................................. 86

○ INSPECTION UPON RELOCATION ............................................................................................. 86

■ EXPECTED SERVICE LIFE OF MAJOR PARTS ............................................................................ 89

■ WARRANTY COVERAGE ....................................................................................................... 90

■ MATERIALS OF PARTS .......................................................................................................... 90

◆ SCHEMATIC DIAGRAM OF ENTIRE SYSTEM ............................................................................. 91

◆ SCHEMATIC DIAGRAM OF REFRIGERATION SYSTEM ( FX/ FL410N, 420N ) ........................... 92

◆ SCHEMATIC DIAGRAM OF WATER CIRCUIT ............................................................................. 93

◆ OPERABLE RANGE OF FOR REFRIGERATOR AUTO/MANUAL OPERATION .................................... 94

◆ SPECIFICATIONS FOR LOW TEMPERATURE & HUMIDITY CHAMBER FX TYPE (- 40 ℃) ............... 95

◆ TEMPERATURE / HUMIDITY CONTROL RANGE (FX TYPE) ....................................................... 103

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■ For Safe Use

Neglecting the warning may cause physical injury or damage of properties.

Neglecting the warning may cause death or severe injuries.

This is a sign which indicates the act that must be done.

This is a sign which indicates the act that should not be done..

WARNING

CAUTION

PROHIBITED

Although safety features are incorporated in our product designs, inappropriate usage by users may cause fire, electric shock, etc.,

which can result in physical injury. When using a chamber, please first read this operation manual carefully to ensure correct and

safe operations.

● Our Warning Labels

We have the following types of warning labels.

Meaning of warning signs are as follows.

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● Please observe the following instructions for safety

Category

Source of danger

CAUTION

Possible harm

Caution

Power source

Do not use a power source of other than 50/60Hz frequency.

Otherwise, an electrical shock, heat, or fire may be caused.

Frequency

Caution

Power plug

Insert the power plug completely. Occasional cleaning is required.

Otherwise, an electrical shock, heat, or fire may be caused.

Connection

Warning

Power plug socket

Use a dedicated power socket.

Otherwise, an electrical shock, heat, or fire may be caused.

Connection

Warning

Power cord

Do not extend the power cord or connect too many power plugs into one electrical outlet.

Otherwise, an electrical shock, heat, or fire may be caused.

Connection

Warning

Power cord

Do not apply unnatural force such as scratching, over-bending, or pulling.

Otherwise, an electrical shock, heat, or fire may be caused.

Unnatural force

Caution

Earth leakage breaker

If the earth leakage breaker is activated, consult your sales agent first without resetting it.

Otherwise, an electrical shock, heat, or fire may be caused.

Post handling

Warning

Combustibles and ignitable substances

Do not place inside the chamber.

This may cause explosions or fire. Explosives

Warning

Rotating parts of the fan

Do not insert fingers or sticks into the rotating parts of the fan.

This may cause injury or electrical shock.

Insertion

Warning

Door

Do not hang on the door. Do not open the door too wide and exceed the limit.

Otherwise, the door may drop or the chamber may fall resulting in injury.

Unnatural force

Warning

Door

Do not open the door when facing its opening if the inside temperature is above 40℃.

The hot air or steam may burn your skin.

Release of steam

Warning

Service panels

Do not allow an unauthorized person to open the panels.

Otherwise, injury or electrical shock may be caused.

Unauthorized person

Warning

Service panels

Before opening a service panel, make sure that the earth leakage breaker is turned off.

Otherwise, an electrical shock may be caused.

Power source

Warning

Room lamp, fuse

Before changing a window lamp or fuse, make sure that the earth leakage breaker is turned off.

This may cause an electrical shock.

Power source

Warning

Refrigerator condenser

Before cleaning the refrigerator condenser, make sure that the earth leakage breaker is turned off.

You may be injured by the fan fixed near the condenser.

Power source

Warning

Power plug

Do not pull out the power plug by holding the cord.

This may cause the breaking of wires, electrical shock or heat.

Pulling of cords

Warning

Power plug

Do not pull out the plug with wet

hands.

This may cause an electrical

shock. Water leak

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Category

Source of danger

CAUTION

Possible harm

Warning

Power plug

Do not use the power plug if the connection is loose.

This may cause an electrical shock, short circuit, or heat.

Connection

Category

Source of danger

CAUTION

Possible harm

Caution

Power plug

When not using the chamber for a long time, disconnect the plug to prevent dust.

This may cause heat or fire. Dust

Caution

Earth leakage breaker

Regularly check the operation and if it is abnormal, replace it.

This may cause an electrical shock.

Operation check

Caution

Overheat protector

Regularly check the operation and if it is abnormal, replace it.

This may cause heat or fire. Operation check

Caution

Specimen shelves

Fix them correctly and firmly.

Otherwise, shelves may come off and fall resulting in injuries or damage to specimens.

Installation

Warning

Specimen shelves

Do not place specimens exceeding the specified weight.

Otherwise, shelves may come off and fall resulting in injuries or damage to specimens.

Weight:

Warning

Glass parts

Do not rest your hand or apply force to the glass parts.

This may cause breakage of the glass or injury.

Unnatural force

Warning

Refrigerator condenser

Do not touch the thin fin while cleaning.

This may cause injury to your fingers.

Contact

Warning

Door handle

Do not hold other than the handle when closing the door.

This may cause injury if your hand is caught in between.

Handling of the

door

Warning

Internal door frame, heat exhaust, heater terminals

Do not touch these areas with your hand and avoid contact.

This may cause burns. Contact

Warning

Exterior of the chamber

Do not nail screws or rivets.

This may cause a short circuit or electrical shock.

Modification

Warning

Chamber

Do not climb or hang on the chamber.

The chamber may fall causing injury or damage.

Weight:

Warning

Airtight specimens

Do not place inside the chamber.

This may cause damage due to freezing or a high temperature explosion.

Specimen

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Category

Source of danger

CAUTION

Possible harm

Warning

Installation site

Avoid places which are prone to high

humidity or moisture.

Failure to do so may cause

electrical shock or a short circuit.

High humidity,

moisture

Warning

Installation site

Install in a space away from

equipment that may generate noise.

This may cause a malfunction or

a serious accident.

Loud noises

Caution

Installation site

Please contact us or your vendor

It may cause electrical shock,

short circuit, or fire.

Installation work

Caution

Installation site

First read the operation manual

carefully.

Failure to do so may cause an

unexpected accident.

Manual

Caution

Installation site

Make sure that D-class earth is

properly grounded.

This may cause an electrical

shock.

Grounding

Warning

Storage and

disposal of

chambers.

Do not store chambers outdoors

where they may be exposed to rain

water.

This may cause a short circuit or

electrical shock.

Rain water

Warning

Storage and

disposal of

chambers.

Do not store chambers where young

children can easily access them.

This may cause death from

suffocation, etc.

Storage space

Caution

Storage and

disposal of

chambers.

Ask us or your vendor to dismantle or

dispose of your unwanted chambers.

This may cause injury or accident.

Dismantling and

disposal

Caution

Cleaning and

inspection

Please wear gloves.

If not, injury may be caused. Wearing gloves

Category

Source of danger

CAUTION

Possible harm

Caution

Installation site

Select a floor which can properly withstand the weight of the chamber.

The chamber may fall causing injury or damage.

Floor load

Caution

Installation site

Install the chamber on a level floor.

The chamber may fall causing injury or damage.

Level floor

Warning

Installation site

Do not install the chamber outdoors where it is exposed to rain water, etc.

Failure to do so may cause electrical shock or a short circuit.

Rain water

(Installation and Disposal)

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Category

Source of danger

CAUTION

Possible harm

Warning

Disassembling and

alternation

Service engineers or vendors only.

Unauthorized personnel are strictly

prohibited.

Otherwise, an electrical shock,

heat, or fire may be caused.

Disassembling

and alteration

Category

Source of danger

CAUTION

Possible harm

Warning

When transferring

the chamber

Do not damage the power plug or the

code.

It may cause electrical shock,

short circuit, or fire.

Damages to the

code

Warning

When transferring

the chamber

First drain out water completely.

Failure to do so may cause

electrical shock or a short circuit.

Complete

drainage

Caution

When transferring

the chamber

Do not apply force on the glass parts,

etc.

If not, injury may be caused.

Pushing glass

parts

Caution

When transferring

the chamber

First remove all specimens from the

chamber.

Failure to do so may cause

damage to the specimens.

Removal of

specimens

Caution

When transferring

the chamber

Please take necessary caution so that

the chamber will not fall.

If not, injury may be caused.

Falling of the

chamber

(When Transferring)

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■ Important Instructions

● Installation Environment

Environmental test chambers are precision apparatuses. In order to maintain reliable performance for the

long term, please prepare a suitable installation environment by observing the following instructions.

32℃. (recommended)

〇 Maintain the room temperature of the installation site within the range of ＋10℃ to

This chamber comes with air-cooled refrigerator. As ambient temperature increases, the refrigeration

capacity gradually decreases and basic performance will be affected, such as not being able to reach

minimum temperature. Once ambient temperature exceeds +40℃, temperature around the temperature control

instruments in the electric board increases, causing the protective device to trip and shut down the instruments. On the

other hand, if an ambient temperature falls below +0℃, humidification water in the water circuit will freeze,

or overcooled refrigerant which circulates inside the refrigeration circuit may cause failure.

〇 When using the chamber inside a closed room, be sure to turn on the air conditioner.

Warm air is exhausted from the refrigerator which is mounted inside the chamber during the operation. If

warm air continues to exhaust in a closed-up room, the room temperature will gradually increase and the

chamber as well as other measuring instruments may be adversely affected. (Please refer to the

specifications table of respective model for the amount of heat exhaust.)

〇 Door packing or circumference of the cable port may condensate during a

low-temperature operation.

During a low temperature operation, condensation may occur around the door packing depending on the

ambient temperature at the time. Moreover, if the silicon stopper of the cable port is not tightly fitted in,

external air may enter inside the chamber, causing frost formation.

〇 Be careful not to change ambient temperature suddenly.

If a chamber is placed in an area from where external air can directly enter inside the chamber such as near

a door, temperature measurements may be temporarily affected causing control failure.

〇 Do not expose the chamber to direct sunlight.

This may cause breakdown, malfunction, or inaccurate measurement.

〇 Do not directly expose the chamber to hot or cold air from air conditioners or any other

apparatus.

This may cause breakdown, malfunction, or control failure.

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〇 Do not use the chamber in a corrosive or explosive atmosphere.

This may cause breakdown, malfunction, or deterioration. Also, this may cause accidental explosions. This device does not

have explosion-proof construction.

〇 Do not place the chamber near equipment that may cause noise.

This may cause breakdown, malfunction, or control failure.

〇 Do not install the chamber in a dusty place.

This may cause breakdown, malfunction, or control failure.

〇 Do not install the chamber in a place where vibrations can be felt.

This may cause breakdown, malfunction, or control failure.

〇 Install the chamber on a level floor.

If the chamber is not placed on the level, both humidification water level control and water drainage will be affected. Make sure

to check the levelness of the chamber using the bubble level or another instrument when installing or transferring the chamber.

〇 Do not place any objects which can obstruct air exhaust on the roof.

This may cause overheating of the refrigerator or electric apparatus, resulting in an abnormal stop of the

chamber.

〇 Do not place any objects which can obstruct air suction at the front.

This may cause overheating of the refrigerator or electric apparatus, resulting in an abnormal stop of the

chamber.

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Door opening/closing

space

# 10 type : 930 or more

# 20 type : 1030 or more

# 30 type : 1330 or more

Top view (unit: mm)

600 or more

Refrigerator

600 or more

Air suction

For exhaust

Air suction

500 or more up to the ceiling

Door opening/closing

space

# 10 type : 930 or more

# 20 type : 1030 or more

# 30 type : 1330 or more

Top view (unit: mm)

100 or more

500 or more

Earth leakage breaker, external output terminals, LAN cables

100 or more

Refrigerator

〇 Chamber installation space

For air suction/exhaust of the refrigerator and for opening/closing the door, the following space needs to

be secured.

◇ Minimum space required for normal usage

* Sufficient space must be secured on the right side because operators need to frequently access this side in order to connect external output

terminals, LAN cable, earth leakage breaker, and water circuit switching valve.

◇ Space required for repair and inspections

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- Caution -

1. Please consult us for required installation space if optional items such as cable port are added.

2. If the humidification water direct feed system (optional: directly connected to tap water or to the purifier) is used,

600mm or more is required at the back of the chamber.

* In order to perform maintenance work, minimum space of 600mm is required. If it is not possible

to move the chamber forward, please make sure to secure the said space.

● Precautions for handling specimens

〇 Do not place dangerous specimens inside the chamber.

Never place the explosive and inflammable materials shown in Table 1 inside the chamber. This may cause an explosion hazard.

In addition, never place the specimens or jigs if their ignition point is below 180℃. This may cause smoking or fire.

〇 Do not place specimens which generate corrosive gases such as SOx and NOx in the chamber.

Do not use specimens that generate corrosive gases such as sulfur dioxide because such specimens deteriorate the materials of the

chamber.

〇 When applying voltage to specimens, use the interlock terminal.

If the chamber is stopped due to some reason, temperature inside the chamber will increase due to self-heating of. specimens,

resulting in burning of the specimens. (For more details, please refer to P27 "Interlock".)

〇 This chamber should not be used for the tests which require a clean atmosphere.

This chamber does not control the degree of cleanliness like a clean room.

〇 Please prevent the formation of condensation on the specimens.

While temperature (humidity) is rising, air temperature inside the chamber and the specimen's temperature do not rise

simultaneously. After air temperature inside the chamber rises, specimen temperature will rise subsequently. Time difference

will vary depending on the materials and quantity of specimens. If specimen temperature becomes lower than the dew-point

temperature of the air temperature at the point of time while temperature is rising, the specimen will condensate. In order to

avoid condensation of specimens, take note of the following points.

Countermeasure 1 Do not suddenly increase temperature (humidity)

Set temperature (humidity) ramp-up rate using program operation mode so that temperature (humidity) will not suddenly

increase during an operation.

For example, in the case of performing a high humidity operation such as +85 ℃/85%RH, it is necessary to gradually increase temperature up

to +85 ℃ first, then increase humidity about 10 to 30 minutes later.

Countermeasure 2 Do not leave specimens inside the chamber after a temperature/humidity test is completed.

If specimens are left inside the chamber after a test is stopped, relative humidity inside the chamber may naturally increase up to 100%RH. Be

sure to restore standard conditions inside the chamber such as +23℃ once a test is completed and remove specimens.

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- Caution -

Placing too many specimens inside the chamber to the extent that airflow is blocked in the area will affect the air circulation, leading to partial overheating around the thermal heater area, and this will cause Er01 (overheat) to occur.

Countermeasures 3 Try not to open the door while a low temperature test is being performed (below dew-point temperature)

so that specimens are not exposed to open air.

[Example] When the environment is 23 ℃/65%RH, the dew-point temperature is 16 ℃. Under this circumstance, if the door is opened

when the temperature inside the chamber is below 16℃, the internal surface of the chamber and specimens will condensate.

Countermeasure 4 Do not place specimens carelessly inside the chamber when a temperature/humidity test is performed

(below dew-point temperature).

[Example] When a test is performed at 40℃/80%, the dew-point temperature inside the chamber is 35.9℃. Under this circumstance, if the

specimens which have a surface temperature of less than 35.9℃ are placed inside the chamber, these specimens will

condensate. (It is presumed that inside the chamber is kept at 40℃/80% for a while after the door is opened.)

○ Place specimens in such a manner that the air circulation in the test area is not obstructed.

Air inside the chamber is forcibly circulated in order to keep temperature (humidity) uniform. Blocking the airflow will affect

uniformity of temperature (humidity).

Page 16

● Handling Instructions

○ Do not repeatedly turn on and off the power switch of the main body.

Excessive turning on/off of the switch during an operation may cause failure of the device.

○ In order to protect specimens, be sure to set the overheat protector.

If the setting is not performed, an operation will not stop even if the temperature inside the chamber is abnormal until it exceeds 110℃ (180℃ for

150℃ specification models).

○ Set +5 ℃ or higher temperature as the upper temperature limit (main controller built-in function).

If the limit is too low, the chamber may temporarily malfunction due to control failure.

○ The USB connector is only meant for a USB memory.

Do not connect and charge other devices (such as a tablet PC or a handheld device). Depending on the specifications of the connected

device, the WEB board may fail due to current surge.

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- Caution -

Placing explosive substances, flammable substances, or other substances containing materials indicated in Schedule 1

inside the chamber may cause an explosion. We will not bear any responsibility related the risks of dangerous

specimens used.

Schedule 1 [Extracted from “Industrial Safety and Health Law, Enforcement Order Article 6, Attached Table”]

○ Explosive Substances

① Nitroglycol, nitroglycerine, nitrocellulose, and other explosive nitrate esters. ② Trinitrobenzene, trinitrotoluene, picric acid, and other explosive nitro compounds ③ Peracetic acid, methyl ethyl ketone peroxide, benzoyl peroxide, and other organic peroxides ④ Sodium azide and other metal azides.

○ Flammable Substances

① Combustibles

・ Metal "lithium", metal "potassium", metal "sodium", yellow white phosphorus, phosphorus sulfide, red

phosphorus, celluloids, calcium carbide, lime phosphide, magnesium powder, aluminum powder,

other metal powders, sodium dithionite (or hydrosulfite).

② Oxides

・ Potassium chlorate, sodium chlorate, ammonium chlorate, and other chlorates. ・ Potassium perchlorate, sodium perchlorate, ammonium perchlorate, and other perchlorates. ・ Potassium peroxide, sodium peroxide, barium peroxide, and other inorganic peroxides. ・ Niter, sodium nitrate, ammonium nitrate, and other nitrates. ・ Sodium chlorite and other chlorites. ・ Calcium hypochlorite and other hypochlorites.

③ Ignitables

・ Ethyl ether, gasoline, acetaldehyde, propylene oxide, carbon dioxide, and other substances that

ignite below 30℃.

・ N-hexane, ethylene oxide, aetone, benzene, methyl ethyl keton, and other substances that ignite between

-30℃ and 0℃.

・ Methanol, ethanol, xylene, normal pentyl acetate (or normal amyl acetate), and other substances that ignite

between 0℃ and +30℃.

・ Tung oil, diesel oil, turpentine oil, isopentyl alcohol (or isoamyl alcohol), acetic acid, and other substances that

ignite between 30℃ and 65℃.

④ Flammable gases

・ Hydrogen, acetylene, ethylene, methane, ethane, propane, butane, and other substances that turn into

gas at +15℃, 1 atm and are flammable.

[Extracted from “Industrial Safety and Health Law, Enforcement Order Article 6, Attached Table 1”]

Page 18

Adverse effect caused by deterioration of humidification water or wet bulb water

Deterioration of

humidification water

wet bulb water

Corrosion of humidification heater

Poor water

Increased humidity uncertainty

Acidification of the atmosphere inside the chamber

Scattered scale

・Shortened service life of

equipment/instruments

・Malfunctioned

equipment/instruments

・Varied test results

Corrosion of the chiller

Deterioration of wick

● Operating Instructions

○ Instantaneous voltage drop

When voltage of the main power suddenly drops due to a lightning, etc., the connected PC may be affected. In order to avoid

such a circumstance, it is advisable to use a UPS for your PC.

○ Discharge humidification water from the subtank if temperature/humidity operation is not performed for

more than two weeks.

Discharge humidification water from the subtank if temperature/humidity operation is not performed for more than two weeks. If not, bacteria

may breed inside the tank.

○ Do not operate the chamber without closing back/side service panels.

Otherwise, electrical shocks, burns, and injuries may be caused.

○ When the chamber is operated with temperature setting only, humidity is not controlled.

For the specimen that requires strict humidity control, please make sure to set the humidity as well.

O Be sure to maintain humidification water pressure between 0.07MPa and 0.5MPa. (In the case of the

humidification system direct connection circuit which does not use a water tank.)

If water supply pressure is too low, water will not be supplied smoothly. On the other hand, if the pressure is too high, leakage

may occur.

O Make sure to use clean humidification water such as ion-exchanged water with an electric conductivity of

less than 0.1 to 10μS/cm or pure water.

If normal tap water is supplied directly, the life of the humidification heater or wick gauze may become significantly shorter.

【Remark】

Quality of humidification water will greatly affect the life of various components inside the chamber as well as reliability test results.

Deterioration of water quality will cause scale to deposit inside the humidifying pan, shortening the life of the humidification heater.

At the same time, water absorbency of a wick will weaken, resulting in larger measurement deviation of humidity. (See below)

Page 19

Fire Alarm

Hot Air

○ Countermeasures to prevent overheating and overcooling while temperature is increasing and decreasing

If the shortest temperature ramp-up or ramp-down time is set during a program operation, temperature will increase or decrease

with the maximum capacity to reach the target temperature. Therefore, there is a possibility of overshooting or undershooting the target

temperature by about 1 to 2℃ when the set temperature/humidity is reached. This problem can be prevented by setting the ramp-up or

ramp-down rate slower than 0.5℃ /minute. Please note that releasing the delayed humidification function of a local control

operation will cause the temperature to increase or decrease with the maximum ramp-up or ramp-down rate in order to reach the

target temperature.

○ Do not open and close the door during a high temperature/high humidity

operation.

Opening the door during high temperature/high humidity tests may cause the following

dangers.

・ Hot air may blow out and burn your skin.

・ As the internal surface of the door is heated, you may burn your skin by touching it.

・ Installing this device just below a fire alarm mounted on the ceiling may cause the

alarm to accidentally activate.

○ Do not unnecessarily open and close the door during a low temperature operation.

Opening the door during low temperature tests may cause the following dangers.

・ Temperature may increase and exceed the set upper limit, causing Er09 to be displayed and the operation to be

stopped.

・ Specimens will condensate.

・ The frost on the surface of the chiller inside the chamber will grow.

○ Take necessary precautions to prevent condensation inside the chiller when temperature inside the

chamber is less than O +35℃ (See P.41 Defrosting method).

In order to maintain the temperature/humidity, a chiller (evaporator) is placed inside the chamber. This chiller consists of numerous

aluminum boards which are overlapped in a several millimeter pitch, and its surface temperature is very low (-45℃ to 0℃) when the temperature

inside the chamber is between -40℃ and +35℃. Because air inside the chamber repeatedly passes through these aluminum boards,

moisture inside the chamber develops into frost on the surface of the chiller and then gradually becomes bigger to form ice.

This ice will cover the cold surface of the chiller, or block air circulation, deteriorating the heat exchanging performance of the

chiller, and as a result, cooling or dehumidification performance will be affected. These frost formations of the chiller will more

commonly happen in the following cases.

・ The door is opened / closed during a low temperature operation, or a cable port is not properly sealed allowing external air

to enter.

・ Temperature/humidity operation at below 35℃ (Because humidification steam will form frost on the surface of the chiller, long hours of

continuous operation is not recommended. If such a test is necessary, please consult us.)

Page 20

Name of accessories

Quantity

Specifications

Model

Water tank

Capacity: 10 liters

〇

FX430

FX730

Shelf board bracket

SUS304

〇

Shelf board

SUS304 3 mesh netting

〇

Gauze wick

12 pieces

〇

Operation Manual

Digest version

〇

Electrical diagram

1 〇

〇

Test certificate

1 〇

〇

● Precautions for disposal

(recovery and decomposition of fluorocarbon refrigerant）

The fluorocarbon refrigerant used in the refrigeration circuit of this chamber must be recovered and decomposed according to the Fluorocarbons

Recovery and Destruction Act (a law which stipulates the collection and the decomposition of fluorocarbons used in certain products).

In order to control discharge of fluorocarbons into the atmosphere through proper recovery and destruction, it is prohibited to

discharge three types of fluorocarbons; chlorofluorocarbon (CFC), hydrochlorofluorocarbon (HCFC), and hydrofluorocarbon

(HFC) which are used for commercial-use air conditioners as refrigerants, into atmospheric air. At the same time, recovery and

destruction of these fluorocarbons at the time of disposal of a device, introduction of a device disposal procedures control system

(to document detailed procedures on disposing fluorocarbons), and clarification of responsibility for collecting old refrigerant at

the time of maintenance are required under this law. Because necessary procedures need to be carried out by professional

contractors who are certified by the refrigerant recovery office of each local government, please contact our customer support

center at the time of disposal.

■ List of Standard Accessories

Page 21

Water ｔank

Shelf board

Shelf board bracket

Operation Manual

（Digest version）

Page 22

Drainage outlet 1

Drainage outlet 2

Service panel

Exhaust vent

Adjuster

Caster

Earth leakage breaker

Power cable port

Temperature (humidity) controller (Local controller)

Water tank

Overheat protector (For protection of specimens)

Door:

Viewing window

Air inlet

External Output Terminal

Subtank

AC100V 3A Plug socket

Power switch

Cable port

■ Name of Parts

Page 23

Water tube

- Caution -

1. When removing the water tank, be sure to disconnect the connector first. Lifting up the water tank with the connector connected may cause the water hose to damage resulting in a water leak. Please handle the water tube connecter with care as any damage of the tip may obstruct the water supply.

3. There is a φ2.5 vent hole on the water tank cover. Be careful not to close this hole with tape, etc. If this vent hole is blocked and a test is performed, water will not be smoothly supplied, causing temperature and humidity control failure. Also, do not turn the water tank sideways with water inside. Humidification water will flow out of the φ2.5 vent hole.

4. Make sure to use clean humidification water such as ion-exchanged water with electric conductivity of less than 0.1 to 10μS/cm or pure water.

■ Preparing for Operation

1. Installing the chamber

① Use a level or another instrument to check if the internal floor inside the chamber is on the level, and if not, adjust the

levelness using adjusters mounted on each leg of the main body.

② Be sure to lower these adjusters until all of them touch the floor.

2. Preparing humidification water (FX type)

① Open the door in front at the bottom and pull out the water tank table. ② Remove the water tube connector located at the bottom right of the water tank. (Press the button of the water tube

connector)

③ Remove the water tank. ④ Supply pure water or ion exchanged water (0.1 to 10μS/cm ) in the water tank. (If a purifier (optional) is equipped, use tap

water.)

⑤ Reattach the water tank on the water tank table. ⑥ Attach the water tube connector back to the water tank. ⑦ Push the water tank table back to the original position. ⑧ Close the door.

Page 24

Drain hose 1

Drain hose 2

- Caution -

1. Make sure that the tip of the drainage hose is exposed to air but not soaked in water, such as in a drain pan or

drain pipe.

2. When using the drain pan, do not face the tip of the drain hose toward other equipment or persons because hot air or hot steam

may spout from the drain hose when the door is closed.

- Caution -

When using a tap water direct feed system or purifier direct feed system (optional), be sure to firmly connect both drain

hose 1 and drain hose 2 to the drain pipe, and do not use the drain pan. If the water circuit fails, humidification water

may continue to overflow.

3. Connecting drain hoses

Tightly connect two drain hoses. Functions of drain hose 1 and drain hose 2 are as follows. For drainage, prepare an around

10-liter container to receive discharge water and throw it away periodically, or connect a drain pipe (recommended).

【Drain hose 1】

① The humidification water inside the chamber will be drained automatically when the following circumstances occur.

About 1 liter of water is drained at a time.

・ The temperature inside the chamber is below +3℃ or above +97℃.

・ The chamber is left untouched for more than one hour after an operation is stopped.

・ When a temperature test is started with the local controller (main body's controller on the door).

・ When more than two steps of a programmed temperature test (by using the remote controller) are continuously

performed.

② During a temperature/humidity operation, vapor in the chamber condenses inside the drain hose and the accumulated

liquid is drained out. Generally, the higher the temperature and humidity are, drainage volume will increase.

If the humidification vapor collection system is not used, discharge volume resulted from an 85℃, 85% RH operation is

about 600ml to 800ml per day.

【Drain hose 2】

Types of water to be drained out are as follows.

・ Condensation water collected in the moisture trap at the bottom of the door and the refrigerator

drain pan

Drainage volume from a temperature/humidity operation is around 0 to 100ml per day depending on the

conditions of the operation.

・ Humidification water in the subtank

If no temperature/humidity operation is performed for more than two

weeks, humidification water in the subtank needs to be discharged

manually. Volume is about 350 ml at a time.

Page 25

Model No.

Capacity of the

earth leakage

breaker (A)

Capacity (A)

Capacity of the

earth leakage

breaker (A)

Earth leakage

breaker's terminal

screw size

Power cable diameter (mm2)

Red: R-phase

White: S-phase

Black: T-phase

Grounding wire diameter (mm2) Green: E-phase

FX410N

5.5

FX420N

5.5

FX430N

14.0

FX710N

8.0

FX720N

8.0

FX730N

14.0

FL410N

5.5

FL420N

5.5

FL430N

8.0

FL710N

8.0

FL720N

8.0

FL730N

8.0

- Caution -

1. The primary power source should fulfill the following requirements - noise level: ± 1.5kV, frequency variation range: ±1%, voltage variation range: AC200V±5%.

2. Use a commercial power source without much voltage variation as the primary power source. The power generated by the generator, etc., tends to have waveform distortion. If effective voltage is not supplied, the refrigerator may stop.

3. An operation may stop when a momentary power failure occurs. Depending on the type of load applied to the refrigerator, even a slight momentary power failure (0.05 seconds) after a thunderbolt may cause an operation to stop.

4. Use the primary breaker which can shut down the current within one second once it detects over 500% of the rated current.

5. Be sure to connect the ground wire in order to prevent an electric shock. Do not connect the ground wire to the town gas pipe or LPG pipe.

6. Do not share the ground wire with other equipment which do not come with an earth leakage breaker.

7. Make sure that the electrical potential between S-phase and the ground is less than 3V.

Grounding

Breaker cover

Service panel

Power c cable port

4. Connecting the power

The power source specification of this chamber is AC200V ± 10％, 3-phase, 50/60Hz. Remove the service panel on the right side and firmly connect the specified cable in the table below with the earth leakage breaker.

① Open the service panel indicated in the figure on the right. ② Remove the breaker cover. ③ Connect the power cable to the primary side of the earth leakage breaker ④ Reattach the breaker cover. ⑤ Connect the ground to the grounding terminal. ⑥ Reattach the service panel.

Page 26

- Caution -

When turning off the power after a dry run is completed, turn off the power switch first before turning off the earth leakage breaker.

If the earth leakage breaker is turned off before the power switch is turned off, the power failure alarm message AL84

will be displayed and an intermittent buzzer will go off from the control panel when the power is turned on. In such a

case, reset the alarm.

5. Starting an operation

① Open the door and attach a wick gauze to the sensor (not required for FL type).

② Turn on the earth leakage breaker (on the side of the main body) and the power switch at the front of the main body in order.

③ Be sure to set temperature/humidity such as +20℃/60%RH first before starting an operation. As for setting procedures,

please refer to the separate manual titled “Settings and Operating Manual”..

④ Open the door to check if wind is circulating inside the chamber.

⑤ Wait for about 10 minutes to make sure that the water level in the humidification pan has risen enough to cover the

humidification heater and that the water level is stable. If the water level is too low, the humidification heater will overheat

and the protective device may be activated. On the other hand, if the water level is too high, it will not only cause

consumption of humidification water to increase, but also affect humidity control during a high temperature/high humidity test.

As for the humidification pan water level adjustment method, "P86 Inspection upon Relocation"(not required for FL type).

⑥ Once water level in the humidification pan is found to be fine, please check with your fingers if the wick gauze is wet. If the

wick gauze is not wet, or water flows out from the wick pan, please refer to "P86 Inspection upon Relocation".

Page 27

Rated Voltage of

Use

Coil Load

Resistance Load

AC110V

10A

AC220V

DC24V

DC48V

1. 5A

External Output

■ Additional Functions

● Interlock

If specimens are electric / electronic components (transformer, capacitor, resistance, mounting board, etc.) and they need to be

energized, be sure to use interlock terminals. If any abnormalities occur within the chamber, relay contacts are activated and

electric conduction is automatically stopped in order to prevent an increase of temperature inside the chamber due to heat

generation from specimens (* please refer to the figure below for connection method).

Table 1: Load and the Rated Voltage of Use

* Minimum working voltage/current: DC5V, 3mA

Page 28

Name

Description

Contact capacity

Time signal output

terminal

（Time signal）

During a humidity test, etc., a contact signal is

output for each step.

This can be used for starting DC power

supply, etc.

Contact rating

AC250V 5A (resistance load)

AC250V 2A (induction load)

Contact point is always open.

(* For connection method, please refer to the

figure below.)

External alarm

terminal

(Trouble)

If a trouble should occur while the chamber is

in operation, a contact signal is outputted.

This can be used for centralized monitoring

from a remote site.

Test end signal

output terminal

This terminal outputs the contact signal when

the test is completed.

This can be used for centralized monitoring

from a remote site.

● External Output Terminal

Table 2: External output terminals and their contact capacity

Page 29

LAN connector

USB connector

Plug socket AC100V 3A For an

External

- Caution -

In principle, please use the provided plug socket for an external terminal (PC). When using this as a power source for

specimens, be sure to use with the interlock terminal.

- Caution -

The USB connector is only meant for a USB memory. Do not connect and charge other devices (such as a tablet PC,

or a handheld device). Current surge may damage a WEB board.

● Plug socket

A plug socket is provided for an external terminal (PC). When using this as a power source for specimens, use with the interlock

terminal.

● LAN connector

Connect a PC in order to operate the chamber with the remote controller. (For more details, please refer to a separate manual

titled “Settings and Operating Manual”..)

● USB connector

Creating a folder of a preselected name in the USB memory will allow users to save operation data and log data in the USB

memory. Use this to regularly back up the operation record. (For more details, please refer to a separate manual titled

“Settings and Operating Manual”..)

Page 30

Model

No.

Vapor recovery

Minimum humidification water

consumption volume

Electric conductivity of

collected condensed water

FXN410

YES

6mℓ/h ～

10μs/cm or less

12mℓ/h ～

FXN420

YES

7mℓ/h ～

10μs/cm or less

17mℓ/h ～

FXN430

YES

15mℓ/h ～

10μs/cm or less

30mℓ/h ～

Sub-tank

Humidification steam recovery line

Pump

To inside chamber

Drain

Switching Valve

Chamber

Condensation

● Humidification vapor recovery system

The FX type comes with the humidification vapor recovery system as a standard specification. A part of vapor is condensed,

collected, and reused by this system.

In particular, this system is effective for high temperature/humidity operations with high vapor pressure (60℃, 80% or higher). (See Table A)

Table A Examples of water consumption at 85℃, 85%RH operation

[Note 1] The consumption volumes mentioned in the above table are guidelines with the premise that the cable port and door

packing is tightly sealed and those are not guaranteed performance. If cable port, etc., are not tightly sealed, the

recovery rate will reduce substantially.

[Note 2] The higher the temperature and humidity become (for example, 85℃, 85%RH), the higher the recovery rate of the

humidification vapor recovery system becomes, while the recovery rate decreases as temperature and humidity

decrease. When temperature and humidity are below 40℃/95%, the recovery rate is almost equivalent to zero.

[Note 3] The data of Table A is just a reference for chamber operation.

Page 31

Chamber

Browser (remote control

Control panel (local operation)

Browser terminal, such as a PC

Local control operation

Pause

Remote controller

ChangSet

Check

Local controller

START

Pause

ChangSet

Check

START

■ Operating Functions

● Local/remote control operation

There are two ways to operate the chamber by using the control panel or a browser. Each method is called local control and remote control

respectively. As for local control, constant operation can be configured other than running and stopping a test.

As for remote control, a chamber can be operated using a browser of a network terminal (PC or tablet PC) which is connected with a LAN cable,

etc. In addition to program configuration including multiple steps, various functions such as user management, operation control,

data download, and mail can be used.

For more details, please refer to “Settings and Operating Manual”..

◇ When an operation is started using the local controller

During a local control operation, the local controller supersedes over the remote controller. Therefore, the remote controller

cannot be used to pause the local control operation or change settings.

Page 32

Remote control operation paused

Remote controller

Local controller

② Restart

① Pause

Restart

Note 1 【STOP】 means the following conditions.

① Settings are changed, elapsed time is reset and the operation is stopped.

② Test profiling is completed and the operation is stopped.

Note 2 【PAUSE】 means that elapsed time is maintained and the operation is temporarily stopped.

Note 3 【RUN】 means an operation, delayed humidification, automatic start stand-by, or defrost function, etc., are

being performed.

Remote control operation

Remote controller

Check

Local controller

Check

Pause

Chang Set

START

Pause

START

Chang Set

◇ When an operation is started using the remote controller

During a remote control operation, the local controller cannot be used to start a test or change settings of the program which

was configured using the remote controller.

◇ Restarting a remote control operation after being stopped by using the local controller

In order to restart a remote control operation after being stopped by using the local controller, the local controller must be used.

The operation cannot be resumed with the remote controller.

Page 33

Remote controller

Local controller

Restart

Pause ①

Restart

【Remark】

Pressing the SET key while a remote control operation is paused will cause the display to change to "Main control

operation - Pause".

Remote control operation

Local operation

◇ Restarting a remote control operation after being paused by using the remote controller

In order to restart a remote control operation after being stopped by using the remote controller, the remote controller must be

used. The operation cannot be resumed with the local controller.

Page 34

To change display

items

By pressing the Λ key, current value of

different items can be viewed one by one

starting from STEP.

Keep pressing this button until you get the item

that you wish to check.

* If this key is not pressed for 5 seconds, the default

screen will come back.

To continuously display

the screen

In order to continuously display the screen, press the

＞ key within 5 seconds after pressing the Λ key.

Steps

(St)

Indicates the present step of the program.

Example: Step 3 is displayed.

WB temperature

(Wb)

Indicates the current temperature of the wet bulb.

Example: WB temperature is 83.1℃.

REF 1 EVAPORATING

TEMP

(E1)

Indicates the current REF1 evaporating temperature.

Example: REF1 evaporating temperature is -45.0℃.

REF 1 SUCTION TEMP

(S1)

Indicates the current REF1 suction temperature.

Example: REF1 evaporating temperature is -20.9℃.

REF 1 DISCHARGE

TEMP

Indicates the current REF1 discharge temperature.

Example: REF1 evaporating temperature is 82.4℃.

● Displaying the status of equipment/instrument

Status of equipment/instrument can be checked during an operation using the local controller. For details, please refer to the

table below.

Display of each value

Page 35

(d1)

REF 2 EVAPORATING

TEMP

(E2)

Indicates the current REF2 evaporating temperature. * 1

Example: REF2 evaporating temperature is -44.9℃.

REF 2 SUCTION TEMP

(S2)

Indicates the current REF2 suction temperature. ＊1

Example: REF2 evaporating temperature is -23.6℃.

REF 2 DISCHARGE

TEMP

(d2)

Indicates the current REF2 discharge temperature. ＊1

Example: REF2 evaporating temperature is 76.5℃.

REF 3 EVAPORATING

TEMP

(E3)

Indicates the current REF3 evaporating temperature. ＊2

Example: REF2 evaporating temperature is -78.6℃.

REF 3 SUCTION TEMP

(S3)

Indicates the current REF3 suction temperature.

Example: REF3 suction temperature is -48.2℃. ＊2

REF 3 DISCHARGE

TEMP

(d3)

Indicates the current REF3 discharge temperature.

Example: REF3 discharge temperature is 68.4℃. ＊2

REF3 CONDENSATION

TEMP

(C3)

Indicates the current REF3 condensation temperature.

Example: REF3 condensation temperature is -12.2℃. ＊2

Ambient temperature

(At)

Indicates the current ambient temperature.

Example: Current ambient temperature is 23.4℃.

Inverter frequency

(Fq)

Indicates the current REF1 inverter frequency.

Example: Current frequency is 32Hz.

Thermal heater output

(ot)

Indicates the current thermal heater output value.

Example: Current output is 48%.

Humidification heater

output

(oH)

Indicates the current humidification heater output value.

Example: Current output is 26%.

Total elapsed time

Indicates the current elapsed time.

Example: Current elapsed time is 29922HR.

- Caution -

Although the ambient temperature (At) measurement sensor (T thermocouple) is placed at the bottom of the chamber where air is well circulated, depending on the operation conditions of the refrigerator, higher temperature than the actual ambient temperature (2 to 3 ℃) may be indicated.

*1 Displayed only if FX430 or FL430 is used.

*2 Displayed only if FX710N, FX720N, FX730N, FL710N, FL720N, or FL730N is used.

Page 36

Display

Description

Detector

Er01

1. Inside the chamber is overheated. The chamber

temperature exceeded the preset value of the digital overheat protector (for the protection of specimens), or

2. The chamber temperature exceeded+110℃ (180℃ for 150℃ specification models).

Liquid expansion type overheat protector 1

Digital overheat protector (for the protection of specimens)

Er04

The humidification heater was boiled dry. The surface

temperature of the humidification heater exceeded + 200℃.

Humidification water may be insufficient and the water-level control circuit may be faulty.

Liquid expansion type overheat protector 2

Er06

(Optional)

Chamber temperature is extremely low (overcooled). Chamber temperature is below the preset value of the digital overcool protector (for the protection of specimens).

Digital overcool protector (for the protection of specimens)

Er07

Evaporating temperature of refrigerator 1 is abnormal.

Refrigerant temperature does not reach set value.

Evaporating temperature sensor

Er08

Evaporating temperature of refrigerator 2 is abnormal.

Refrigerant temperature does not reach set value.

Evaporating temperature sensor

Er09

Evaporating temperature of refrigerator 3 is abnormal.

Refrigerant temperature does not reach set value.

Evaporating temperature sensor

Er11

Pressure of refrigerator 1 exceeded the specified value.

(2.9MPa or more)

High pressure switch

Er12

Pressure of refrigerator 2 exceeded the specified value.

(2.9MPa or more)

High pressure switch

Er13

Pressure of refrigerator 3 exceeded the specified value.

(2.9MPa or more)

High pressure switch

Er15

Electric current of refrigerator 2 exceeded the specified value. (6.6A or more)

Thermal relay

Er18

The fan motor 1 is overheated. (+120℃ or more)

Thermal protector

Er19

The fan motor 2 is overheated. (+120℃ or more)

Thermal protector

Er21

Discharge temperature or evaporating temperature of refrigerator 1 is outside the specified value.

Pipe temperature sensor

Er22

Discharge temperature or evaporating temperature of refrigerator 2 is outside the specified value.

Pipe temperature sensor

Er23

Discharge temperature or evaporating temperature of refrigerator 3 is outside the specified value.

Pipe temperature sensor

■ Protective Device

● Error numbers

When any abnormality occurs during an operation, the error (Er) number as shown in the list below will be displayed in the

temperature/humidity display area of the local controller while an alarm sounds, and then the operation will be stopped. Be sure

to take necessary measures to solve the problem according to the causes of the error before resuming an operation.

Page 37

Display

Description

Detector

Er27

Subtank's water level increased excessively.

Float switch

Er31

Primary power source's phase does not match.

Negative phase relay

Er32

The refrigerator protector for refrigerator 1 inverter was activated.

Protection circuit inside the inverter

Er41

Refrigerator 1 is overheated. (Discharge temperature or compressor head temperature exceeded +110℃.)

Pipe temperature sensor, or Compressor case thermostat

Er42

Refrigerator 2 is overheated. (Discharge temperature or compressor head temperature exceeded +110℃.)

Pipe temperature sensor, or Compressor case thermostat

Er42

Refrigerator 3 is overheated. (Discharge temperature or compressor head temperature exceeded +110℃.)

Pipe temperature sensor, or Compressor case thermostat

Er45

Ambient temperature is abnormal. Ambient temperature fell below 0℃ or exceeded 45℃.

Ambient temperature sensor

Er47

Temperature inside the chamber exceeded the preset upper limit value.

Temperature sensor

Er48

Humidity inside the chamber exceeded the preset upper limit value.

Temperature sensor

Er49

Temperature inside the chamber fell below the preset lower limit value. (No setting is made at the time of shipment)

Temperature sensor

Er50

Humidity inside the chamber fell below the preset lower limit value. (No setting is made at the time of shipment)

Temperature sensor

Er51

Chamber temperature exceeded the upper limit of +20℃. (+120 for +100℃ specification models, and +170℃ for +150℃ specification models)

Temperature sensor

Er56

The wet bulb sensor (WB) was disconnected.

Self-diagnostic function

Er57

The dry bulb sensor (DB) was disconnected.

Self-diagnostic function

Er60

The cold junction sensor of the equipment monitoring thermocouple's input unit was disconnected.

Self-diagnostic function

Er61

The equipment monitoring thermocouple was disconnected.

Self-diagnostic function

Er99

The temperature/humidity controller's CPU malfunctioned.

Self-diagnostic function

Page 38

Display

Description

Detector

AL26

Humidification water inside the water tank or subtank is insufficient.

Float switch inside the subtank

AL45

Chamber ambient temperature fell below 0℃ or exceeded 40℃.

Ambient temperature sensor

AL47

Temperature inside the chamber exceeded the preset upper limit value. (Test temperature is preset at +10℃ at the time of shipment)

Temperature sensor

AL48

Humidity inside the chamber exceeded the preset upper limit value. (No setting is made at the time of shipment)

Temperature sensor

AL49

Temperature inside the chamber exceeded the preset lower limit value. (No setting is made at the time of shipment)

Temperature sensor

AL50

Humidity inside the chamber exceeded the preset lower limit value. (No setting is made at the time of shipment)

Temperature sensor

AL52

ETACOM ambient temperature exceeded 58℃.

Controller built-in sensor

AL72

WICK GAUZE IS DRY

Self-diagnostic function

AL73

INSUFFICIENT HUMID WATER

Float switch

AL75

(Optional)

HUMID WATER HAS DETERIORATED

Conductivity sensor (optional)

AL84

POWER FAILURE

Self-diagnostic function

AL86

Time to clean the refrigerator dust proof filter.

Self-diagnostic function

● Alarm numbers

When any abnormality occurs during an operation, the alarm (AL) number as shown in the list below is displayed in the temperature display area

of the chamber while a buzzer sounds. Although an operation will be continued for alarms other than AL84, necessary measures

need to be taken. Please refer to P.42 "Troubleshooting" and clear the causes of the alarm.

[Note] When the upper/lower limits warning function is activated, by using an external terminal, you can select either to ① stop

the operation with error display (Er 47 to 50) or ② continue the operation with intermittent buzzer (AL 47 to 50).

Page 39

Temperature inside the chamber

Upper temperature limit

Set temperature

Lower temperature limit

● About setting of upper and lower temperature limits

In order to protect specimens, upper and lower temperature (humidity) limits are set in relation to the set temperature. Once

upper and lower temperature (humidity) limits are set, an upper and lower temperature (humidity) limit zone is created, and either

one of the following actions can be selected against operating temperature deviation from the temperature zone.

1) Error function: Entire chamber operation will be stopped and the abnormality will be notified by the buzzer and error display

(Er47 - Er50).

2) Alarm function: Operation will be continued and the abnormality will be notified by the buzzer and error display (Er47 - Er50).

Although alarm function is selected at the time of shipment, this setting can be changed to error function using the remote

controller.

※ For details, please refer to “Settings and Operating Manual”..

● Setting overheat protector (for the protection of specimens)

This is a device to protect specimens and it will forcibly stop the chamber operation when the temperature inside the chamber

gets extremely high.

① Protective functions when an abnormality occurs

If the temperature inside the chamber exceeds the set value, the chamber will be forcibly stopped and error messages

“CHAMBER TEMPERATURE ABNORMALLY HIGH, FORCIBLY STOPPED” and “Er01” will be displayed on the

remote controller's browser and control panel's LED respectively.

② How to change the activation temperature

・ In order to change the activation temperature, change the setting of the overheat protector displayed on the front panel.

・ Use the "٧”, and “٨” keys to change the activation temperature on the display. Press and hold the keys in order to

change temperature quickly. (The setting can be changed in increments of 1℃.)

Page 40

Stop the sound.

 In order to stop alarm or buzzer,

Press the ＞ key.

Reset the error.

 ① While pressing the > key,

② press the SET key.

 If the sound continuously generates, it means that

multiple errors occurred.

 As long as the causes of the alarm or error remain,

you cannot stop the sound by resetting it.

①

②

Remote controller

Local controller

Error/alarm

reset

Error/alarm

reset

Restart

Trouble!

■ How to Reset Error/Alarm

● Error/alarm resetting procedures

● Resuming an operation after resetting error/alarm

Although error/alarm can be reset by using the local or remote controller, an operation can be resumed only with the local

controller.

Page 41

Humidification pan

[Note] Once the frost on the chiller becomes bigger and thicker, condensation water (water drops) will start to accumulate on the internal surface (sheet metal) of the chamber.

■ Defrosting Method

● About frost formation on the chiller

In order to maintain the temperature/humidity, a chiller (evaporator) is placed inside the chamber. This chiller consists of numerous

aluminum boards which are overlapped in a several millimeter pitch, and its surface temperature is very low (-45℃ to 0℃) when the temperature

inside the chamber is between -40℃ and +35℃. Because air inside the chamber repeatedly passes through these aluminum boards,

moisture inside the chamber develops into frost on the surface of the chiller and then gradually becomes bigger to form ice. This

ice will cover the cold surface of the chiller, or block air circulation, deteriorating the heat exchanging performance of the chiller,

and as a result, cooling or dehumidification performance will be affected. For example, set values may not be able to be maintained or

controlled and may become unstable during a low temperature operation or temperature/humidity operation (below +35℃). The frost formation

of the chiller will more commonly happen in the following cases.

1） The door is opened / closed during a low temperature operation, or the cable port is not properly sealed

allowing external air to enter.

2） Temperature/humidity operation at below 35℃.

* Because humidification steam will form frost on the surface of the chiller, long hours of continuous operation is not

recommended. (If such a test is necessary, please consult us.)

● Checking frost formation

① Stoop an operation and turn off the power. ② The chiller is attached at the suction area (just above the

humidification pan) in the chamber. Place a mirror just above the

humidification pan and visually check frost formation.

● How to defrost

◇ Defrost by setting chamber temperature above +66℃ (use either the local or remote controller)

① Remove specimens from the chamber.

② Select AUTO for the refrigerator and set temperature at +66℃ or above and start an operation.

③ Although time varies depending on the amount of the frost and set temperature, the entire defrosting operation including water drainage will

complete in about 1 to 2 hours.

◇ Defrost by setting chamber temperature between +1℃ and +66℃ (use the remote controller)

① Remove specimens from the chamber.

② Select MANUAL and turn off all refrigerators.

③ In order to prevent upper/lower limits errors Er 47 to 50 to occur, use the remote controller to change the setting to alarm function. (If alarm

function is already selected, this process is not necessary.)

④ Select MANUAL, set temperature between +5 ℃ and +66℃m, and start an operation.

⑤ Although time varies depending on the amount of frost and set temperature, the entire defrosting operation including water drainage will

complete in about 2 to 5 hours.

Page 42

Error / alarm No., and messages

Possible causes and diagnosis * In the case of

the remote controller, clicking the number will

indicate the causes and remedies.

Functions to

be activated

Local

controller

LED display

Messages appear in the

remote controller's

browser

Causes

EXCESSIVE SPECIMENS/HEAT VALUE

Buzzer sounds

continuously.

Er01

CHAMBER TEMPERATURE ABNORMALLY HIGH

OHP SET ERROR

Heater output is stopped.

FORCIBLY STOPPED

TEMP CONTROLLER FAULTY

Ten seconds

later,

Remedies

DECREASE SPECIMEN HEAT VALUE

Fan is turned

off.

CHECK/RESET OHP SETTING

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Due to overheating inside the chamber, either one of or both protective devices below was/were activated. These errors occur if the temperature in the test area exceeds 110℃ (or 180 ℃ for 150℃ specification unit) or the temperature of the overheat protector set by the user exceeds the set value.

● EXCESSIVE SPECIMENS/HEAT VALUE If excessive heat is generated from specimens, temperature inside the chamber may

not be maintained. Please consult us regarding permissible heat load for the

chamber. In addition, if too many specimens are placed in such a manner that air

circulation is blocked, airflow velocity around the thermal heater decreases, causing localized overheating.

● TEMP CONTROLLER FAULTY Typical failure modes are as follows. a) Temperature/humidity controller's thermal heater output is continuously turned on.

Tips for troubleshooting

OHP1

Overheat protector for specimen

■ Troubleshooting

If any problem occurs relating to this product, please first read the following error/alarm information before contacting us or your

vendor. Whenever error occurs, various information such as time, temperature/humidity, and operational status (temperature

measurements of various parts of the refrigerators, ambient temperature, control output values) will be automatically stored in the

main body memory. When contacting us, please send us that information from the PC that you are using as the remote controller,

so that we can identify the cause of error and attend to the issue quickly.

● When Er01 is displayed

Page 43

b) SSR (solid state relay) for the thermal heater control is short-circuited and the thermal heater is continuously turned on. c) Deterioration of cooling capacity. d) Localized overheating caused by decrease in circulation air velocity.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation.

4) Open the door and check if wind blows out from the outlet inside the chamber. => If there

is almost no wind, this may cause localized overheating inside the chamber.

5) Press the > key to continuously display the heater output on the local controller.

(For more details about the display, please refer to “P34 Displaying the status of

equipment/instrument”.

=> If the heater output is 0%, this means that the temperature/humidity controller

is properly controlling the heater.

=> Please stop the operation if temperature inside the chamber cannot reach

-10℃ even 30 minutes later because there is a possibility that the thermal heater is continuously turned on.

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

LEVEL ADJUST FLOAT FAULTY

Buzzer sounds

continuously.

Er04

HUMIDIFICATION HEATER 1 BOILING DRY

LEVEL ADJUST ERROR

Heater output is

stopped.

FORCIBLY STOPPED

HUMID CONTROLLER FAULTY

<10 seconds later>

Remedies

CHECK/RESTORE LEVEL ADJUST FLOAT SWITCH

Fan turns off.

CHECK & READJUST HUMID WATER LEVEL

CHECK/REPAIR HUMID CNTL CIRCUIT

Humidification water is insufficient and the humidification pan is boiled dry. The surface temperature of

the humidification heater exceeded + 200 ℃ and overheat protector two has activated. Although the

humidification heater is designed not to turn on when humidification water level is low, there may be a possibility that there was electric conduction in the humidification heater when the error occurred. In such a case, the humidification circuit can breakdown once the humidification water dries out. 。

● When Er04 is displayed

Page 44

●LEVEL ADJUST FLOAT FAULTY or LEVEL ADJUST ERROR

Humidification water level is detected by the float switch inside the level controller that can be found inside the service panel on the right side. Water level cannot be correctly detected if the main body is terribly tilted

because of negligence of checking the levelness of the chamber when it was first installed, or if the level controller's adjustment position is not aligned, or if the float switch is caught in half way due to scale formation, and this will cause the pan heater to falsely start to output.

[Inspection procedure]

1) Turn off the main power.

2) Open the side panel and check the float position inside the level controller (a transparent cup made from plastic) fixed at the bottom.

3) Check the water level in the humidification pan placed at the rear of the chamber. If a) there is no water in the humidification pan inside the chamber even though the level controller

has water in it, or

b) the water level inside the humidification pan water is low and a part of the pan heater is exposed

even though the level controller has water in it.

① Check if the float inside the level controller is not caught halfway due to scale formation, etc.

If this is the case, open the lid of the cup and wipe inside the cup and float with a clean cloth.

② Check if a water feed/drain filter inside the humidification pan is clogged. If it is dirty, remove the filter by turning

it, washing it, and putting it back to the original position.

③ Check if the chamber is level, and if not, adjust the levelness using adjusters mounted on each leg

of the main body.

④ Turn on the power and start a temperature/humidity operation (20℃, 60%RH). ⑤ Usually, water should be fed in 3 to 5 minutes. Check the water level in the humidification pan inside the

chamber and make necessary adjustments. (For adjustment of water level, please refer to "■ Maintenance and Inspection" reference.) Remove the filter by turning it, washing it, and putting it back to the original position.

● HUMID CONTROLLER FAULTY

Typical failure modes are as follows. a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is continuously turned on.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber.

(If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at 20℃, 35% using the local controller, and start a temperature/humidity

operation. (Set the fastest humidity decrease rate.) Please make sure that the water level in the humidifying pan is normal at this time.

4) Press the > key to continuously display the humidification heater output on the local controller. (For

more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the humidification heater output is 0%, this means that the temperature/humidity controller is

properly controlling the humidification heater.

=> Please stop the operation if humidity inside the chamber does not reach the set value even 30 minutes later or if

humidity increases, because there is a possibility that the humidification heater is continuously turned on.

Level controller

Humidification pan

Page 45

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate

the causes and remedies.

Functions to be

activated

Local

controlle

LED

display

Messages appear in the remote

controller's browser

Causes

OCP SET ERROR

Er06

CHAMBER TEMPERATURE EXTREMELY LOW

Heater is disconnected

Operation stops

FORCIBLY STOPPED

TEMP CONTROLLER FAULTY

Fan turns off.

Remedies

CHECK/RESET OCP SETTING

Buzzer sounds

continuously.

CHANGE HEATER

CHANGE/REPAIR TEMP CONTROLLER

Note

This error occurs if the temperature in the test area falls below the set value of the excess cooling protector. (Optional)

O CP SET ERROR Check if the overcool protector's value is correctly set.

● TEMP CONTROLLER FAULTY

Typical failure modes are as follows. a) Temperature/humidity controller's humidification heater output is always "OFF" and it does not change to "ON". b) SSR (solid state relay) for temperature control is open-circuited, preventing the thermal

heater from turning on or the thermal heater circuit's fuse is blown.

c) Refrigerating capacity is excessive.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too cold, please wait until the chamber goes back to room

temperature.)

3) Set the temperature at 50℃ using the local controller, and start a temperature operation. (Set

the shortest temperature ramp-up time.)

4) Press the > key to continuously display the humidification heater output on the local

controller. (For more details about display, please refer to “P34 Displaying the status of

equipment/instrument”.

=> If the heater output is 80 to 100%, this means that the temperature/humidity controller is properly

controlling the thermal heater.

=> If inside the chamber does not reach 50℃ even 30 minutes later or if the temperature hardly goes up,

please stop the operation because there is a possibility either the thermal heater circuit is disconnected, SSR (solid state relay) is open-circuited preventing the thermal heater from turning on, or the power source for SSR is defective.

5) Once temperature reaches 50℃, the refrigerator will activate. Press the > key in the local

controller to continuously display the refrigerator's operating frequency. (For more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> Once set value is reached, operating frequency is maintained at 70 to 90HZ for a few minutes and it will decrease gradually. If frequency is maintained at 70 to 90HZ for more than 30 minutes or if

temperature inside the chamber is not maintained and gradually decreases, the refrigeration capacity may be excessive due to defective refrigeration capacity control function.

Tips for troubleshooting

● When Er06 is displayed

Page 46

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate

the causes and remedies.

Functions to be

activated

Local

controller

LED

display

Messages appear in the remote

controller's browser

Causes

REF EVAPORATING TEMP CONTROL SYSTEM FAILURE

Er07

REF 1 (2,3)

COOLING PIPE CLOGGED

Operation stops.

Er08

EVAPORATING TEMP ERROR

REFRIGERATION GAS LEAK

Fan turns off.

Er09

FORCIBLY STOPPED

Remedies

CHANGE/REPAIR REF EVAPORATING TEMP CONTROL SYSTEM

Buzzer sounds

continuously.

CHANGE/REPAIR COOLING PIPE

FIX REFRIGERANT LEAK/REFILL REFRIGERANT

Note

Refrigerator evaporating temperature is abnormal. Refrigerant temperature does not reach set value.

● REF EVAPORATING TEMP CONTROL SYSTEM FAILURE

Typical failure modes are as follows. a) The electronic expansion valve's coil is disconnected. b) Output of the temperature/humidity controller electronic expansion valve control is abnormal.

● COOLING PIPE CLOGGED OR REF GAS LEAK

Typical failure modes are as follows.

a) Refrigerant does not flow smoothly because the drier or solenoid valve, etc., are clogged with

sludge.

b) Organic acid generated from specimens corroded the chiller (heat exchanger inside the

chamber) and refrigerant gas leaks.

c) Abnormal vibration formed cracks in the refrigeration pipes and refrigerant gas leaks. d) During transportation, the joint part of cooling pipe became loose and refrigeration gas leaks.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot or cold, please wait until the chamber goes back to room

temperature.)

3) Set the temperature at -40℃ using the local controller, and start a temperature operation. (Set the shortest temperature ramp-down time.)

4) Press the > key to continuously display the operating frequency on the local controller. Once

an operation is started, operating frequency will reach 90HZ in 1 to 3 minutes. (Operating sound will also change.) (For more details about display, please refer to “P34

Displaying the status of equipment/instrument”.)

5) Press the > key to continuously display the evaporating temperature on the local controller.

(For more details about display, please refer to “P34 Displaying the status of equipment/instrument”.)

Usually, evaporating temperature decreases as temperature inside the chamber decreases, and when

temperature inside the chamber reaches -40℃, evaporating temperature is about -45 ℃. (Even if the

temperature falls below -45℃ temporarily, it is not abnormal.)

Tips for troubleshooting

● When Er07 or 08 is displayed

Page 47

=>① Evaporating temperature does not fall below -15℃ when temperature decreases.

② Evaporating temperature does not increase from -48℃ when temperature decreases. ③ Temperature inside the chamber does not reach -40℃, or temperature ramp-down rate

obviously became slower.

(For temperature ramp-down rate when inside the chamber is empty and ambient temperature

is 18 to 28℃, please refer to the specification tables in P95 to P102.

Please stop an operation, if any of above symptoms are observed, because there is a

possibility that either the refrigerant evaporating temperature control system is faulty, the cooling pipe is clogged, or refrigerant gas is leaking.

Page 48

Suction

Exhaust

Suction

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED

display

Messages appear in the

remote controller's

browser

Causes

LOW SUCTION/EXHAUST AIR FLOW

Er11

REF 1 (or 2, 3)

AMB TEMP EXCEEDED 40℃.

Operation stops

Er12

ABNORMAL PRESSURE

AIR MIXED IN COOLING PIPE

Fan turns off.

Er13

FORCIBLY STOPPED

Remedies

CHECK SUCTION/EXHAUST SYSTEM

Buzzer sounds

continuously.

CHECK/ADJUST AMB TEMP

FIX REFRIGERANT LEAK, REFILL REFRIGERANT

Note

Operating high pressure of the refrigerator exceeded the specified value. (2.9MPa or more)

● LOW SUCTION/EXHAUST AIR FLOW

Typical failure modes are as follows.

a) Anti-dust filter is clogged.

b) Air suction/exhaust inlet/outlet is blocked with some objects. c) The refrigerator exhaust fan is faulty.

⇒ Remove the anti-dust filter and clean it.

⇒ Check if air suction/exhaust inlet/outlet is blocked with some objects. ⇒ Place your hand in front of the exhaust outlet located at the top of the chamber in the rear

to determine if warm air comes out.

If the refrigerator exhaust fan is defective, the fan needs to be changed.

● AMB TEMP EXCEEDED 40℃.

If "LOW SUCTION/EXHAUST AIR FLOW" error and "AMB TEMP EXCEEDED 40℃" error occur at the same time, the possibility of operating pressure to exceed the specified value will increase. Check

ambient temperature and use air-conditioner if necessary, or ventilate the installation area.

● AIR MIXED IN COOLING PIPE

If a gas leak occurs from the refrigerator low pressure pipe due to situations such as a) to c) below, the operating pressure becomes negative, causing external air to mix in the cooling pipe.

a) Organic acid generated from specimens corroded the chiller (heat exchanger inside the chamber) and refrigerant gas leaks. b) Abnormal vibration formed cracks in the cooling pipe and refrigerant gas leaks. c) During transportation, the joint part of the cooling pipe became loose and refrigeration gas leaks.

[Inspection procedure]

1. Conduct necessary inspections to identify causes of "LOW SUCTION/EXHAUST AIR FLOW" error and reset the error. However, if the pressure is still high, an error cannot be reset until it decreases. Therefore, it is necessary to wait for about a few minutes to ten or more minutes.

2) Remove specimens from the chamber. (If inside the chamber is too hot or cold, please wait until the chamber goes back to room temperature.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation. (Set the shortest temperature ramp-down time.)

Tips for troubleshooting

● When Er11, 12, or 13 is displayed

Page 49

Reset button

4) Press the > key to continuously display the discharge temperature on the local controller.

(For more details about display, please refer to “P34 Displaying the status of

equipment /instrument”.)

⇒ If there are no problems in terms of suction and exhaust of air and yet discharge temperature

exceeds 100℃, please stop the operation because comprehensive inspection for the refrigeration circuit is necessary..

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

THERMAL SWITCH WRONG SETTING

REF2 (3) CURRENT ABNORMAL

ABNORMAL VOLTAGE

Operation stops

Er15

FORCIBLY STOPPED

REF COMP FAILURE

Fan turns off.

Er16

Remedies CHECK/RESET THERMAL SWITCH

Buzzer sounds

continuously.

CHECK/ADJUST VOLTAGE

CHECK/REPAIR REFRIGERATOR

Note

The refrigerator's electric current exceeded the specified value. (6.6A or more)

● THERMAL SWITCH WRONG SETTING

Check if the thermal sensor's value is correctly set.

● ABNORMAL VOLTAGE

Please check if voltages between R-S, S-T, and R-T phases are within the AC190V to AC210V range.

● REF COMP FAILURE

Typical failure modes are as follows.

Usually, mechanism elements inside the refrigerator wear out because of reduced compressor oil caused by the following factors.

ⅰ) Operations are performed with negative pressure over a long period of time (see Er 7 and8).

ⅱ) Liquid backflow at the start of low-temperature operation due to temporal increase of

refrigerant volume caused by remaining refrigerant inside the chiller as well as defective electronic expansion valve (increased opening), and resulting liquid compression

ⅲ) Frequent intermittent operations

[Inspection procedure]

1) Open the service panel on the back and press the thermal relay reset button. (Electrical work must be

performed by the person who has completed electrical education and training programs.)

2) Remove specimens from the chamber. (If inside the chamber is too hot or cold, please wait until the chamber goes back to room temperature.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation. (Set the shortest temperature ramp-down time.)

=> If the trouble recurs, check operational status (ambient temperature, evaporating temperature,

discharge temperature, etc.) on the WEB screen or local controller and contact our customer support center.

Tips for troubleshooting

● When Er15 or 16 is displayed

Page 50

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the

remote controller's browser

Causes

LOW EXHAUST AIRFLOW AROUND

MOTOR

Er18

CIRCULATING FAN

MOTOR FAULTY 1 (2)

MOTOR AMBIENT TEMP TOO HIGH

Operation stops

Er19

FORCIBLY

STOPPED

BEARING WORN OUT

Fan turns off.

Remedies

CHECK/FIX SUCTION/EXHAUST

SYSTEM

Buzzer sounds

continuously.

CHECK/ADJUST AMB TEMP

CHANGE MOTOR

Note

Either one or both of the circulation fan motor(s) inside the chamber exceeded 120℃ and the protective device

(thermal sensor) was activated.

● LOW EXHAUST AIRFLOW AROUND MOTOR

If suction/exhaust air flow decreases, air flow near the fan motor which is located along the air exhaust path will decrease, causing the fan motor to overheat.

Typical reasons of decrease in suction/exhaust volume are as follows. a) Anti-dust filter is clogged.

b) Air suction/exhaust inlet/outlet is blocked with some objects. c) The refrigerator exhaust fan is faulty.

⇒ Remove the anti-dust filter and clean it.

⇒ Check if air suction/exhaust inlet/outlet is blocked with some objects. ⇒ Place your hand in front of the exhaust outlet located at the top of the chamber in the rear if

warm air comes out.

If the refrigerator exhaust fan is defective, the fan needs to be changed.

● AMBIENT TEMP TOO HIGH

If "LOW SUCTION/EXHAUST AIR FLOW" error and "AMB TEMP EXCEEDED 40℃" error occur at the same time, the possibility of the fan motor overheating will increase. Check ambient temperature and use an air-conditioner if necessary, or ventilate the installation area.

● BEARING WORN OUT

Typical causes for deterioration of bearings are as follows.

a) Water seeped in from the shaft penetration part.

b) Fan is not well-balanced.

If abnormal noise is generated or the error recurs after the chamber is restarted, stop the operation

and contact our customer support center because a bearing may be defective in such a case.

Tips for troubleshooting

● When Er18 or 19 is displayed

Page 51

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

REF EVAPORATING TEMP CONTROL SYSTEM FAILURE

Er21

REF 1 (2,3)

COOLING PIPE CLOGGED OR REF GAS LEAK

Operation stops

Er22

COOLING ERROR

COMPRESSOR OVERCOOLED

Fan turns off.

Er23

FORCIBLY STOPPED

Remedies

CHANGE REF EVAPORATING TEMP CONTROL SYSTEM

Buzzer sounds

continuously.

FIX REFRIGERANT LEAK, REFILL REFRIGERANT

CHECK/REPAIR COMP SELF-COOLING SYSTEM

Note

Refrigerant one’s discharge temperature is outside the specified value.

● REF EVAPORATING TEMP CONTROL SYSTEM FAILURE

Typical failure modes are as follows. a) The electronic expansion valve's coil is disconnected. b) Output of the temperature/humidity controller electronic expansion valve control is abnormal.

● COOLING PIPE CLOGGED OR REF GAS LEAK

Typical failure modes are as follows. a) Refrigerant does not flow smoothly because the drier or solenoid valve, etc., are clogged with sludge. b) Organic acid generated from specimens corroded the chiller (heat exchanger inside the chamber) and refrigerant gas leaks. c) Abnormal vibration formed cracks in the cooling pipe and refrigerant gas leaks. d) During transportation, the joint part of cooling pipe became loose and refrigeration gas leaks.

● COMPRESSOR OVERCOOLED

Typical failure modes are as follows. a) The compressor refrigeration system (liquid injection valve) is kept open. b) Refrigerant does not evaporate and flows into the compress in the state of a liquid.

[Remedy]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot or cold, please wait until

the chamber goes back to room temperature.)

3) Set the temperature at -40℃ using the local controller, and start a temperature operation. (Set the shortest temperature ramp-down time.)

4) Press the > key to continuously display the operating frequency on the local controller. Once an operation is started, operating frequency will reach 90HZ in 1 to 3 minutes. (Operating sound will also change.) (For more details about display, please refer to “P34 Displaying the status of

equipment/instrument”.)

5) Press the > key to continuously display the evaporating temperature on the local controller. (For

more details about display, please refer to “P34 Displaying the status of equipment/instrument”.)

⇒ Usually, evaporating temperature decreases as temperature inside the chamber decreases, and when temperature inside the chamber reaches -40℃, evaporating temperature at that time is around -45℃. (Even if the temperature falls below -45℃ temporarily, it is not abnormal.) Evaporating temperature does not fall below -15℃ when temperature decreases.

② Evaporating temperature does not increase from -48℃ when temperature decreases. ③ Temperature inside the chamber does not reach -40 ℃ , or temperature ramp-down rate

obviously became slower.

Tips for troubleshooting

● When Er21, 22, or 23 is displayed

Page 52

Please stop an operation, if any of above symptoms are observed, because there is a possibility that either the refrigerant evaporating temperature control system is faulty, the cooling pipe is clogged, or refrigerant gas is leaking.

6) Press the > key to continuously display the discharge temperature on the local controller. (For

more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

⇒ Normal discharge temperature is 10℃ to 100 ℃ . Therefore, please stop the operation if discharge temperature falls below 10 ℃ because there is a possibility that the compressor's refrigeration system (liquid injection valve) is faulty or gas is leaking.

Page 53

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

SV1 MALFUNCTIONS (DOES NOT CLOSE)

Er27

SUBTANK FULL FORCIBLY STOPPED

SV4 MALFUNCTIONS (DOES NOT CLOSE)

* In the case of the humidification water direct feed system (optional)

Operation stops

Fan turns off.

Buzzer sounds

continuously.

Remedies

CHECK/ADJUST SV1

CHECK/ADJUST SV4

Note

Because SV1(or SV4) which controls the water level of the subtank did not close, the water level continued to rise, causing FS1H (a float switch for the subtank upper limit control) to activate and as a result, an operation was interrupted.

● SV4 or SV4 MALFUNCTIONS (DOES NOT CLOSE)

Typical failure modes are as follows.

a) The solenoid valve is clogged. In this case, water flow will not stop. Therefore, water level continues to rise and eventually, humidification water will be discharged from the overflow line.

b) The float switch for the solenoid valve ON-OFF control (FS1L) is continuously turned on.

c) The solenoid valve control relay is continuously turned on.

[Inspection procedure]

1) Turn off the earth leakage breaker.

2) Remove the water tank if humidification water continues to flow out from the overflow line. b) If

humidification water is supplied directly from the direct water supply line (optional), close the main valve of the line.

⇒ If overflow continues even after the power is turned off, the solenoid valve may be clogged.

Tips for troubleshooting

● When Er27 is displayed

Page 54

Er27

(Continued

from the

page)

3) Open the drain cock which is attached on the right side of the subtank and drain out humidification

water.

Open the subtank cover and check if the float is not caught in half way due to slime or foreign particles inside the tank.

⇒ If the internal surface is soiled with slime, etc., clean it off with a cloth.

4) Close the drain cock.

5) Turn on the earth leakage breaker as well as the main power, and reset the error.

6) Set and start a temperature/humidity operation.

7) Move the lower float (FS1L) up and down by hand and check the sound of the solenoid valve.

⇒ If the solenoid valve does not sound "click, click" when the float moves up and down, please stop the operation because either the float switch or solenoid valve control circuit (relay or temperature/humidity controller relay output) is faulty.

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

WRONG PHASE CONNECTION

WRONG PHASE

Operation stops

FORCIBLY STOPPED

Fan turns off.

Remedies

CHANGE R PHASE FOR T PHASE

Buzzer sounds

continuously.

CONNECT 3PHASE AC200V.

Note

Three phases do not match.

[Inspection procedure]

1) Turn off the power switch and breaker.

2) Open the front service panel on the right side, measure the interphase voltage, and check if the

power source is AC, 3-phase. (Electrical work must be performed by a person who has completed electrical education and training programs.)

・Reconnect all wires of the primary power source to the correct phases. (R phase and T phase)

4) Turn on the power switch and reset the error using the temperature/humidity controller screen.

5) Restart the chamber.

If the problem recurs, please contact our customer support center.

- Caution -

Please note that if humidification water is directly supplied by the direct water supply line, overflow will not stop until its main valve is closed. If the water is fed from the water tank (standard method), overflow will stop once water level inside the tank falls.

● When Er31 is displayed

Page 55

Inverter board (at the back of the main body)

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

REF 1 INV FAULT DETECTION FUNC

ACTIVATED

Er32

INVERTER

ABNORMAL

Operation

stops

FORCIBLY

STOPPED

Fan turns off.

Remedies

REBOOT & VERIFY OPERATION

Buzzer sounds

continuously.

CHECK REF SYSTEM

Note

This error occurs if refrigerator one’s inverter detects

abnormalities in refrigerator control.

Comprehensive inspection of the refrigerator is necessary. Please stop the operation and contact our customer support center.

● When Er32 is displayed

Page 56

Suction

Exhaust

Suction

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

LOW SUCTION/EXHAUST AIR FLOW

Er41

REF 1 (2,3) TEMP

AMB TEMP EXCEEDED 40℃.

Operation stops

Er41

OVERHEATED

AIR MIXED IN COOLING PIPE

Fan turns off.

Er43

FORCIBLY STOPPED

Remedies

CHECK SUCTION/EXHAUST SYSTEM

Buzzer sounds

continuously.

CHECK/ADJUST AMB TEMP

FIX REFRIGERANT LEAK, REFILL REFRIGERANT

Note

The refrigerator is overheated. (Discharge temperature or compressor head temperature exceeded

+110℃.)

● LOW SUCTION/EXHAUST AIR FLOW

Typical reasons of decrease in suction/exhaust volume are as follows. a) Anti-dust filter is clogged.

b) Air suction/exhaust inlet/outlet is blocked with some

objects.

c) The refrigerator exhaust fan is faulty.

⇒ Remove the anti-dust filter and clean it.

⇒ Check if air suction/exhaust inlet/outlet is blocked with some objects. ⇒ Place your hand in front of the exhaust outlet located at the top of the chamber in the rear to

determine if warm air comes out.

If the refrigerator exhaust fan is defective, the fan needs to be changed.

● AMB TEMP EXCEEDED 40℃.

If "LOW SUCTION/EXHAUST AIR FLOW" error and "AMB TEMP EXCEEDED 40℃" error occur at the

same time, the possibility of operating pressure exceeding the specified value will increase. Check ambient temperature and use an air-conditioner if necessary, or ventilate the installation area.

● AIR MIXED IN COOLING PIPE

If a gas leak occurs from the refrigerator low pressure pipe due to situations such as a) to c) below, operating pressure becomes negative, causing external air to mix in the cooling pipe.

a) Organic acid generated from specimens corroded the chiller (heat exchanger inside the chamber) and refrigerant gas leaks. b) Abnormal vibration formed cracks in the cooling pipe and refrigerant gas leaks. c) During transportation, joint part of cooling pipe became loose and refrigeration gas leaks.

[Inspection procedure]

1. Conduct necessary inspections to identify causes of "LOW SUCTION/EXHAUST AIR FLOW"

error and reset the error. However, if the pressure is still high, an error cannot be reset until it decreases. Therefore, it is necessary to wait for about a few minutes to 10 or more minutes.

2) Remove specimens from the chamber. (If inside the chamber is too hot or cold, please wait until the chamber goes back to room

temperature.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation. (Set

the shortest temperature ramp-down time.)

4) Press the > key to continuously display the discharge temperature on the local controller. (For

more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

If there are no problems in terms of suction and exhaust of air and yet discharge temperature exceeds 100℃, please stop the operation because comprehensive inspection for the refrigeration circuit is necessary

Tips for troubleshooting

● When Er41, 42, or 43 is displayed

Page 57

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

AMBIENT TEMP EXCEEDED 45℃

Er45

ABNORMAL AMBIENT TEMPERATURE

AMBIENT TEMP FELL BELOW 0℃

Operation stops

FORCIBLY STOPPED

AMB TEMP SENSOR FAULTY

Fan turns off.

Remedies

CHECK/ADJUST AMB TEMP

Buzzer sounds

continuously.

CHANGE AMB TEMP SENSOR

Note

Ambient temperature is too low or too high at below 0℃ or above 45℃.

● AMBIENT TEMP EXCEEDED 35℃ or AMBIENT TEMP FELL BELOW 0℃

Press the > key to continuously display the ambient temperature using the local controller and observe changes in ambient temperature. If necessary, turn on an air-conditioner or ventilate the air

inside the room where the chamber is placed. (For more details about display, please refer to “P34

Displaying the status of equipment/instrument”.)

● AMB TEMP SENSOR FAULTY

If abnormal ambient temperature is indicated on the local controller (such as -90℃),

Check if the ambient temperature sensor is properly connected and fasten the screw if it is loose. ② Disconnect the ambient temperature sensor and check electrical conduction between all wires with a tester. If no conduction is detected, the sensor is disconnected. If there is a spare thermocouple sensor, replace with the existing sensor and check the measurement value. If an abnormal value is still indicated even after the sensor is changed, the temperature/humidity controller may be faulty.

【Remark】 Maintain the room temperature of the installation site within the range of ＋10℃ to 32℃ (recommended). This chamber comes with an air-cooled refrigerator. As ambient temperature increases, the refrigeration capacity gradually decreases and basic performance will be affected, such as not being able to reach minimum temperature. Once ambient temperature exceeds +40℃, temperature around the temperature control instruments in the electric board increases, causing the protective device to trip and shut down the instruments. On the other hand, if an ambient temperature falls below +0℃, humidification water in the water circuit will freeze, or overcooled refrigerant which circulates inside the refrigeration circuit may cause a breakdown.

【Remark 2】 Although the ambient temperature measurement sensor (T thermocouple) is placed at the bottom of the chamber where air is well circulated, depending on the operation conditions of the refrigerator, higher temperature than the actual ambient temperature (2 to 3 ℃) may be indicated.

Tips for troubleshooting

● When Er45 is displayed

Page 58

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

Operation stops

Er47

TEMPERATURE

EXCEEDED UPPER

LIMIT

EXCESSIVE HEAT FROM SPECIMEN

<10 seconds

later>

FORCIBLY STOPPED

TEMP CONTROLLER FAULTY

Fan turns off.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

DECREASE SPECIMEN HEAT VALUE

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Temperature inside the chamber exceeded the preset upper limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower temperature limits are set, upper/lower temperature zones are created, and whenever temperature deviates from the temperature zones, the chamber completely stops and indicates the abnormality by buzzer and error display.

● TEMP CONTROL TEMPORARILY UNSTABLE

1) If the upper temperature limit is too low, the error function may be activated when temperature

control became temporarily unstable.

2) Opening the door during a low temperature operation may cause the temperature inside the

chamber to increase and exceed the upper temperature limit zone.

● EXCESSIVE HEAT FROM SPECIMEN

If excessive heat is generated from specimens, temperature inside the chamber may not be maintained. Please consult us regarding permissible heat load for the chamber.

● TEMP CONTROLLER FAULTY

Typical failure modes of the temperature controller are as follows.

a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is

continuously turned on.

c) Deterioration of cooling capacity.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation. (Set the shortest temperature ramp-down time.)

4) Press the > key to continuously display the heater output on the local controller.

(For more details about display, please refer to P34 "Displaying the status of

equipment/instrument".

=> If the heater output is 0%, this means that the temperature/humidity controller is properly controlling the heater.

⇒ If temperature inside the chamber does not reach -10℃ even 30 minutes later, please stop the operation because there is a possibility that the thermal heater is continuously turned on.

Tips for troubleshooting

Temperature inside the chamber

Upper temperature limit

Set temperature

Lower temperature limit

● When Er47 is displayed

Page 59

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

HUMID CONTL TEMPORARILY UNSTABLE

Er48

HUMIDITY EXCEEDED UPPER LIMIT

EXCESSIVE HEAT FROM SPECIMEN

Operation stops

FORCIBLY STOPPED

HUMID CONTROLLER FAULTY

Fan turns off.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

DECREASE SPECIMEN HEAT VALUE

CHECK/REPAIR HUMID CNTL CIRCUIT

Note

Humidity inside the chamber exceeded the preset upper limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower humidity limits are set, upper/lower humidity zones are created in relation to the set value, and whenever humidity deviates from the humidity zones, the chamber completely stops and notifies of the abnormality by buzzer and error display.

● HUMID CONTL TEMPORARILY UNSTABLE

1) If the upper humidity limit is too low, the chamber may be forcibly stopped when humidity control

becomes temporarily unstable.

2) Opening the door during a low humidity operation may cause temperature inside the chamber to

increase and humidity may exceed the upper humidity limit zone.

● EXCESSIVE HEAT FROM SPECIMEN

If excessive heat is generated from specimens, the temperature inside the chamber may not be maintained. Please consult us regarding permissible heat load for the chamber.

● TEMP CONTROLLER FAULTY

Typical failure modes of the humidity controller are as follows.

a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is

continuously turned on. c) Deterioration of dehumidification capacity. d) Deterioration of wick gauze.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot, please wait until the chamber cools down.)

3) Check the condition of the wick gauze (if it is dirty, hard due to scale formation, etc. => Please change the wick gauze if it is found to be too deteriorated.)

4) Set the temperature at 20℃, 35% using the local controller, and start a temperature/humidity operation. (Set the fastest humidity decrease rate.) Please make sure that the water level in the humidifying pan is normal at this time.

5) Press the > key to continuously display the humidification heater output on the local controller. (For more details about display, please refer to “P34 Displaying the status of equipment/instrument”.) => If the humidification heater output is 0%, this means that the temperature/humidity controller is properly controlling the humidification heater.

=> Please stop the operation if humidity inside the chamber does not reach the set value even 30 minutes later or humidity increases, because there is a possibility that the humidification heater is continuously turned on.

Tips for troubleshooting

Humidity inside the chamber

Upper Humidity limit

Set Humidity

Lower Humidity limit

● When Er48 is displayed

Page 60

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

Er49

TEMPERATU RE EXCEEDED LOWER LIMIT

THERMAL HEATER DISCONNECTED

Operation stops

TEMP CONTROLLER FAULTY

Fan turns off.

FORCIBLY STOPPED

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

CHANGE THERMAL HEATER

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Temperature inside the chamber fell below the preset lower limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower temperature limits are set, upper/lower temperature zones are created, and whenever temperature deviates from the temperature zones, the chamber completely stops and notifies of the abnormality by buzzer and error display.

● Fluctuation of temperature control

1) If the upper temperature limit is too low, the error function may be activated when temperature control becomes temporarily unstable.

2) Opening the door during a high temperature operation may cause temperature inside the chamber to suddenly decrease exceeding the lower temperature limit.

● TEMP CONTROLLER FAULTY

Typical failure modes of the temperature controller are as follows. a) Temperature/humidity controller's humidification heater output is always "OFF" and it does not change to "ON". b) SSR (solid state relay) for thermal heater control is open-circuited and the thermal heater does not turn on.

c) Refrigerating capacity is excessive.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too cold, please wait until the chamber goes back to room temperature.)

3) Set the temperature at 50℃ using the local controller, and start a temperature operation. (Set

the shortest temperature ramp-up time.)

4) Continuously display humidification heater output on the local controller. (For more details about

display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the heater output is 80 to 100%, this means that the temperature/humidity controller is properly controlling the thermal heater.

Tips for troubleshooting

Upper temperature limit

Set temperature

Lower temperature limit

Temperature inside the chamber

● When Er49 is displayed

Page 61

Er49

=> If inside the chamber does not reach 50℃ even 30 minutes later or if the temperature hardly goes up, please stop the operation because there is a possibility either the thermal heater circuit is disconnected, SSR (solid state relay) is open-circuited preventing the thermal heater from turning on, or the power source for SSR is defective.

5) Once the temperature reaches 50℃, the refrigerator will activate. Press the > key on the local

controller to continuously display the refrigerator's operating frequency. (For more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> Once set value is reached, operating frequency is maintained at 70 to 90HZ for a few minutes and it will decrease gradually. If frequency is maintained at 70 to 90HZ for more than 30 minutes or

if temperature inside the chamber is not maintained and gradually decreases, the refrigeration capacity may be excessive due to a defective refrigeration capacity control function.

Page 62

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

Er50

TEMPERATURE EXCEEDED LOWER LIMIT

HUMID HEATER DISCONNECTED

Operation stops

TEMP CONTROLLER FAULTY

Fan turns off.

FORCIBLY STOPPED

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

CHANGE HUMID HEATER

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Humidity inside the chamber fell below the preset lower limit value. In order to protect specimens, upper and lower humidity limits are relative values in relation to preset humidity. When upper/lower humidity limits are set, upper/lower humidity zones are created in relation to the set value, and whenever humidity deviates from the humidity zones, the chamber completely stops and notifies of the abnormality by buzzer and error display.

● TEMP CONTROL TEMPORARILY UNSTABLE

1) If the upper temperature limit is too low, the error function may be activated when temperature

control became temporarily unstable.

2) Opening the door during a high humidity operation may cause humidity inside the chamber to

suddenly decrease and exceed the lower humidity limit.

● HUMID CONTROLLER FAULTY

Typical failure modes of the temperature/humidity controller are as follows. a) The temperature/humidity controller's thermal heater output is continuously turned off. b) SSR (solid state relay) for thermal heater control is open-circuited and the thermal heater does

not turn on.

c) Excessive dehumidification capacity.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber.

(If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at 40℃, 95% using the local controller, and start a temperature/humidity

operation. (Set the fastest humidity increase rate.) Please make sure that the water level in the humidifying pan is normal at this time. Also, turn off the delayed humidification function.

4) Continuously display the humidification heater output on the local controller. (For more details

about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the humidification heater output gradually increases and increases above 50%, this means that the temperature/humidity controller is properly controlling the humidification heater.

=> If humidity inside the chamber does not reach the set value even 30 minutes later or if humidity decreases, there is a possibility that the humidification heater is continuously turned off. If the refrigerator's

operating frequency is found to be maintained at 60HZ using the local controller, dehumidification capacity might have become excessive due to refrigeration capacity control failure.

Tips for troubleshooting

Upper Humidity limit

Set Humidity

Lower Humidity limit

Humidity inside the chamber

● When Er50 is displayed

Page 63

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

EXCESSIVE HEAT FROM SPECIMEN

Operation stops

Er51

UP LIMIT TEMP

EXCEEDED BY OVER 20℃

TEMP CONTROLLER FAULTY

<10 seconds

later>

FORCIBLY

STOPPED

Fan turns off.

Remedies

DECREASE SPECIMEN HEAT VALUE

Buzzer sounds

continuously.

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Inside the chamber was overheated and the temperature exceeded the specified upper temperature limit by 20℃.

● EXCESSIVE HEAT FROM SPECIMEN

If excessive heat is generated from specimens, temperature inside the chamber may not be maintained. Please consult us regarding permissible heat load for the chamber.

● TEMP CONTROLLER FAULTY

Typical failure modes of the temperature controller are as follows.

a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is

continuously turned on.

[Inspection procedure]

1) Reset the error.

2) Remove specimens from the chamber. (If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation. (Set

the shortest temperature ramp-down time.)

4) Press the > key to continuously to display the heater output on the local controller. (For more

details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the heater output is 0%, this means that the temperature/humidity controller is properly controlling the heater.

⇒ If temperature inside the chamber does not reach -10℃ even 30 minutes later, please stop the operation because there is a possibility that the thermal heater is continuously turned on.

Tips for troubleshooting

● When Er51 is displayed

Page 64

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

WB POOR CONTACT/DISCONNECTED

Er56

WET BULB

SENSOR

BROKEN

TEMP/HUMID CONT FAILURE

Operation stops

FORCIBLY

STOPPED

Fan turns off.

Remedies

CHECK/CHANGE WB CONTACT POINT

Buzzer sounds

continuously.

CHANGE TEMP/HUMID CONT

Note

This error occurs if the wet bulb sensor is broken or the connection becomes loose.

[Inspection procedure]

1) Press the > key to continuously display the wet bulb temperature on the local controller. (For more

details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the wet bulb (WB) temperature is abnormal such as above 320℃ or below -99.9℃,

please take the following measures. Check if the wet bulb sensor is properly connected and fasten the screw if it is loose. ② Disconnect the wet bulb sensor and check electrical conduction between all wires with a tester. If no conduction is detected, the sensor is disconnected. If there is a spare wet bulb sensor, replace with the existing sensor and check the measurement value. If still an abnormal value is indicated even after the sensor is changed, the temperature/humidity controller may be faulty. Please stop the operation.

● When Er56 is displayed

Page 65

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

DB POOR CONTACT/DISCONNECTED

Er57

DRY BULB SENSOR BROKEN

TEMP/HUMID CONT FAILURE

FORCIBLY STOPPED

Fan turns off.

Remedies

CHECK/CHANGE DB CONTACT POINT

Buzzer sounds

continuously.

CHANGE TEMP/HUMID CONT

Note

This error occurs if the dry bulb sensor (Pt100) is broken or the connection becomes loose.

[Inspection procedure]

1) Press the > key to continuously display the dry bulb temperature on the local controller. (For more

details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If abnormal dry bulb (DB) temperature is abnormal such as above s 320℃ or below -99.9℃, please take the following measures.

Check if the temperature sensor is properly connected and fasten the screw if it is loose. ② Disconnect the temperature sensor and check electrical conduction between all wires with a tester. If no conduction is detected, the sensor is disconnected. If there is a spare temperature sensor, replace with the existing sensor and check the measurement value. If an abnormal value is still indicated even after the sensor is changed, please

stop the operation because the temperature/humidity controller may be faulty.

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the remote

controller's browser

Causes

COLD JUNCTION SENSOR BROKEN

Er60

COLD JUNCTION SENSOR BROKEN

FORCIBLY STOPPED

Fan turns off.

Remedies

CHANGE TEMP/HUMID CONT

Buzzer sounds

continuously.

Note

The temperature/humidity controller's thermocouple cold junction is faulty. The thermocouple's temperature compensation circuit is faulty. [Inspection procedure] Use the local controller to display temperature of each area (evaporating temperature, discharge

temperature or suction temperature) and ambient temperature. (For more details about display,

please refer to “P34 Displaying the status of equipment/instrument”.) If the cold junction is faulty, the above-mentioned temperatures should all be abnormal (all are above 300℃).

● When Er57 is displayed

● When Er60 is displayed

Page 66

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the

remote controller's browser

Causes

SYSTEM MONIT SENSOR (T THERMO C) DISCONNECTED

Er61

SYSTEM MONITORING SENSOR BROKEN

TEMP/HUMID CONT FAILURE

FORCIBLY STOPPED

Fan turns off.

Remedies

CHECK/CHANGE SYSTEM MONIT SENSOR

Buzzer sounds

continuously.

TEMP/HUMID CONT FAILURE

Note

This error occurs if the sensor which measures the temperature of various points in the refrigeration circuit (evaporating temperature, discharge temperature, or suction temperature) or the sensor (T thermocouple) which measures ambient temperature is disconnected or poorly connected.

[Inspection procedure]

1) Use the local controller to display evaporating temperature, discharge temperature, suction

temperature, or ambient temperature. (For more details about display, please refer to “P34

Displaying the status of equipment/instrument”.

2) Identify which temperature is abnormal (above 250℃), and take the following measures.

① Check if the temperature sensor which indicated an abnormal value is properly connected and

fasten the screw if it is loose. ② Disconnect the temperature sensor which indicates an abnormal temperature and check electrical conduction between all wires with a tester. If no conduction is detected, the sensor is disconnected. Please stop the operation.

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the remote

controller's browser

Causes

CPU ERROR

Er99

CPU ERROR

Internal memory error.

Operation

stops

Fan turns off.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

Note

CPU input/output error.

CPU malfunctioned due to the noise which exceeded an acceptable level or surge, or internal memory

may be faulty.

● When Er61 is displayed

● When Er99 is displayed

Page 67

Messages to be displayed when alarm is

generated

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED

display

Messages appear in the remote

controller's browser

Causes

WATER TANK LOW

AL26

Please supply

humidification water.

SV1 DOES NOT OPEN

Alarm is displayed.

Remedies

REFILL WATER TANK

Buzzer sounds

intermittently.

Note

A temperature/humidity operation is performed and humidification water inside the water tank or

subtank (inside the machine room) became insufficient. Even if an alarm occurs, temperature control will be continued. Then, when the subtank dries out, the humidification control function stops and humidity inside the chamber will gradually decrease. If the lower humidity limit has been already set,

Er50 triggers a complete stop of the chamber or an alarm (AL50) will be displayed.

● WATER TANK LOW

Please refill water tank. An alarm message will disappear automatically in a few minutes.

When this alarm occurs, the remaining water inside the subtank is about 500ml. Please supply

humidification water within the time as described below.

① If a temperature/humidity operation is performed and the humidification pan inside the chamber

still has some water:

=> Supply humidification water within 6 hours from the alarm.

Note 1) The above-mentioned time is calculated based on the assumption that the water

consumption during a temperature/humidity operation is about 80ml/h. For this calculation, some allowance is factored in for the situation whereby packing around the cable port is a little insufficient even though the humidification vapor collection system is used. However, please note that this is only a guide because the consumption volume of humidification water is largely affected by the sealing tightness of the chamber.

Note 2) If airtightness of the chamber is maintained well, the consumption volume of humidification water when

a temperature/humidity operation becomes stable is about

8 to 20 ml.

② If a temperature/humidity is operated and the temperature setting is included in the program:

=> Add humidification water, before the first step of a temperature operation starts.

If the following temperature settings are included in the temperature/humidity operating program, humidification water inside the chamber will automatically be drained out (about 1000ml). Therefore, it is necessary to add humidification water before the next step starts. i. Temperature inside the chamber is below +3℃ or above +97℃. ii. More than two steps of programmed temperature test are continuously performed (by using the remote controller).

● SV1 DOES NOT OPEN If the alarm display does not disappear even 10 minutes after the humidification water is added in the water tank, please stop the operation because the water solenoid valve is faulty or water pipes are clogged.

Tips for troubleshooting

● When AL26 is displayed

Page 68

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

AMBIENT TEMP EXCEEDED 40℃

AL45

AMB TEMP OUTSIDE THE RANGE

AMBIENT TEMP FELL BELOW 5℃ AMB TEMP SENSOR FAULTY

Alarm is

displayed.

Remedies

CHECK/ADJUST AMB TEMP

Buzzer sounds

intermittently.

CHANGE AMB TEMP SENSOR

Note

Chamber ambient temperature fell below 5℃ or exceeded 40℃.

[Inspection procedure]

● AMBIENT TEMP EXCEEDED 40℃ or AMBIENT TEMP FELL BELOW 5℃

Press the > key to continuously display the ambient temperature using the local controller and observe changes in ambient temperature. If necessary, turn on an air-conditioner or ventilate the

air inside the room where the chamber is placed. (For more details about display, please refer to “P34

Displaying the status of equipment/instrument”.

● AMB TEMP SENSOR FAULTY

If abnormal ambient temperature is indicated on the local controller (such as -90℃),

Check if the ambient temperature sensor is properly connected and fasten the screw if it is loose. ② Disconnect the ambient temperature sensor and check electrical conduction between all wires with a tester. If no conduction is detected, the sensor is disconnected. If there is a spare thermocouple sensor, replace with the existing sensor and check the measurement value. If still an abnormal value is indicated even after the sensor is changed, please stop the operation because the temperature controller may be faulty.

【Remark 1】 Maintain the room temperature of the installation site within the range of ＋10℃ to +32℃

(recommended). This chamber comes with an air-cooled refrigerator. As ambient temperature increases, the refrigeration capacity gradually decreases and basic performance will be affected, such as not being able to reach minimum temperature. Once ambient temperature exceeds +40℃, temperature

around the temperature control instruments in the electric board increases, causing the protective device to trip and shut down the instruments. On the other hand, if ambient temperature falls below +0℃,

humidification water in the water circuit will freeze, or overcooled refrigerant which circulates inside the refrigeration circuit may cause breakdown.

【Remark 2】 Although the ambient temperature measurement sensor (T thermocouple) is placed at the

bottom of the chamber where air is well circulated, depending on the operation conditions of the refrigerator, higher temperature than the actual ambient temperature (2 to 3 ℃) may be indicated.

Tips for troubleshooting

● When AL45 is displayed

Page 69

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

AL47

TEMPERATURE

EXCEEDED UPPER LIMIT

EXCESSIVE HEAT FROM SPECIMEN

TEMP CONTROLLER FAULTY

Alarm is

displayed.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

DECREASE SPECIMEN HEAT VALUE

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Temperature inside the chamber exceeded the preset upper limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower temperature limits are set, upper/lower temperature zones are created, and whenever temperature deviates from the temperature zones, the abnormality is notified by the buzzer and alarm display.

● TEMP CONTROL TEMPORARILY UNSTABLE

1) If the upper temperature limit is too low, the error function may be activated when temperature control became temporarily unstable.

2) Opening the door during a low temperature operation may cause temperature inside the chamber to increase and exceed the upper temperature limit zone.

● EXCESSIVE HEAT FROM SPECIMEN

If excessive heat is generated from specimens, temperature inside the chamber may not be maintained. Please consult us regarding permissible heat load for the chamber.

● TEMP CONTROLLER FAULTY Typical failure modes of the temperature controller are as follows.

a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is

continuously turned on.

c) Deterioration of cooling capacity.

[Inspection procedure]

1) Reset the alarm.

2) Remove specimens from the chamber. (If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at -10℃ using the local controller, and start a temperature operation.

(Set the shortest temperature ramp-down time.)

4) Press the > key to continuously display the heater output on the local controller. (For more

details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the heater output is 0%, this means that the temperature/humidity controller is properly controlling the heater.

⇒ If the temperature inside the chamber does not reach -10℃ even 30 minutes later, please stop the operation because there is a possibility that the thermal heater is continuously turned on or refrigeration capacity has weakened.

Tips for troubleshooting

Temperature inside the chamber

Upper Temperature limit

Set Temperature

Lower Temperature limit

● When AL47 is displayed

Page 70

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

HUMID CONTL TEMPORARILY UNSTABLE

AL48

HUMIDITY EXCEEDED UPPER LIMIT

EXCESSIVE HEAT FROM SPECIMEN

HUMID CONTROLLER FAULTY

Alarm is

displayed.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

DECREASE SPECIMEN HEAT VALUE

CHECK/REPAIR HUMID CNTL CIRCUIT

Note

Humidity inside the chamber exceeded the preset upper limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower humidity limits are set, upper/lower humidity zones are created, and whenever humidity deviates from the humidity zones, the abnormality is notified by the buzzer and alarm display.

● HUMID CONTL TEMPORARILY UNSTABLE

1) If the upper humidity limit is too low, the alarm function may be activated when humidity control

becomes temporarily unstable.

2) Opening the door during a low humidity operation may cause temperature inside the chamber

to increase and humidity may exceed the upper humidity limit zone.

● EXCESSIVE HEAT FROM SPECIMEN

If excessive heat is generated from specimens, temperature inside the chamber may not be maintained. Please consult us regarding permissible heat load for the chamber.

● TEMP CONTROLLER FAULTY

Typical failure modes of the humidity controller are as follows.

a) Temperature/humidity controller's thermal heater output is continuously turned on. b) SSR (solid state relay) for thermal heater control is short-circuited and the thermal heater is

continuously turned on.

c) Deterioration of dehumidification capacity.

[Inspection procedure]

1) Reset the alarm.

2) Remove specimens from the chamber.

(If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at 20℃, 35% using the local controller, and start a temperature/humidity

operation. (Set the fastest humidity decrease rate.) Please make sure that the water level in the humidifying pan is normal at this time.

4) Continuously display the humidification heater output on the local controller. (For more details

about display, please refer to “P34 Displaying the status of equipment/instrument”. => If the humidification heater output is 0%, this means that the temperature/humidity controller is properly controlling the humidification heater.

Tips for troubleshooting

Humidity inside the chamber

Upper humidity limit

Set humidity

Lower humidity limit

● When AL48 is displayed

Page 71

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the remote

controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

AL49

TEMPERATURE EXCEEDED LOWER LIMIT

THERMAL HEATER DISCONNECTED TEMP CONTROLLER FAULTY

Alarm is

displayed.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

CHANGE THERMAL HEATER

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Temperature inside the chamber fell below the preset lower limit value. In order to protect specimens, upper and lower temperature limits are relative values in relation to preset temperature. When upper/lower temperature limits are set, upper/lower temperature zones are created, and whenever temperature deviates from the temperature zones, the abnormality is notified by the buzzer and alarm display.

● TEMP CONTROL TEMPORARILY UNSTABLE

1) If the upper temperature limit is too low, the error function may be activated when temperature

control became temporarily unstable.

2) Opening the door during a high temperature operation may cause temperature inside the

chamber to suddenly decrease and exceed the lower temperature limit.

● TEMP CONTROLLER FAULTY

c) Refrigerating capacity is excessive.

[Inspection procedure]

1) Reset the alarm.

2) Remove specimens from the chamber. (If inside the chamber is too cold, please wait until the chamber goes back to room

temperature.)

3) Set the temperature at 50℃ using the local controller, and start a temperature operation. (Set

the shortest temperature ramp-up time.)

4) Continuously display humidification heater output on the local controller. (For more details

about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> If the heater output is 80 to 100%, this means that the temperature/humidity controller is properly controlling the thermal heater.

Tips for troubleshooting

Upper temperature limit

Set temperature

Lower temperature limit

Temperature inside the chamber

● When AL49 is displayed

Page 72

AL49

5) Once the temperature reaches 50℃, the refrigerator will activate. Press the > key in the local

controller to continuously display the refrigerator's operating frequency. (For more details about display, please refer to “P34 Displaying the status of equipment/instrument”.

=> Once the set value is reached, the operating frequency is maintained at 70 to 90HZ for a few minutes and it will decrease gradually. If frequency is maintained at 70 to 90HZ for more than 30 minutes or if the

temperature inside the chamber is not maintained and gradually decreases, the refrigeration capacity may be excessive due to defective refrigeration capacity control function.

Page 73

Error / alarm No., and messages

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the remote

controller's browser

Causes

TEMP CONTROL TEMPORARILY UNSTABLE

AL50

TEMPERATURE EXCEEDED LOWER LIMIT

HUMID HEATER DISCONNECTED TEMP CONTROLLER FAULTY

Alarm is

displayed.

Remedies

RESTART AFTER RESET

Buzzer sounds

continuously.

CHANGE HUMID HEATER

CHECK/REPAIR TEMP CNTL CIRCUIT

Note

Humidity inside the chamber fell below the preset lower limit value. In order to protect specimens, upper and lower humidity limits are relative values in relation to preset humidity. When upper/lower humidity limits are set, upper/lower humidity zones are created, and whenever humidity deviates from the humidity zones, the abnormality is notified by the buzzer and alarm display.

● TEMP CONTROL TEMPORARILY UNSTABLE

1) If upper temperature limit is too low, the error function may be activated when temperature

control became temporarily unstable.

2) Opening the door during a high humidity operation may cause humidity inside the chamber to

suddenly decrease and exceed the lower humidity limit.

● HUMID CONTROLLER FAULTY

Typical failure modes of the temperature/humidity controller are as follows. a) Temperature/humidity controller's thermal heater output is continuously turned off. b) SSR (solid state relay) for thermal heater control is open-circuited and the humidification

heater does not turn on.

c) Excessive dehumidification capacity.

[Inspection procedure]

1) Reset the alarm.

2) Remove specimens from the chamber.

(If inside the chamber is too hot, please wait until the chamber cools down.)

3) Set the temperature at 40℃, 95% using the local controller, and start a temperature/humidity

operation. (Set the fastest humidity increase rate.) Please make sure that the water level in the humidifying pan is normal at this time. Also, turn off the delayed humidification function.

4) Press the > key to continuously display the humidification heater output on the local controller.

(For more details about display, please refer to “P34 Displaying the status of

equipment/instrument”.

=> If the humidification heater output gradually increases and increases above 50%, this means that the temperature/humidity controller is properly controlling the humidification heater. => If humidity inside the chamber does not reach the set value even 30 minutes later or if humidity decreases, there is a possibility that the humidification heater is continuously turned off. If the refrigerator's

operating frequency is found to be maintained at 60HZ using the local controller, dehumidification capacity might have become excessive due to refrigeration capacity control failure.

Upper Humidity limit

Set Humidity

Lower Humidity limit

Humidity inside the chamber

Tips for troubleshooting

● When AL50 is displayed

Page 74

Messages to be displayed when alarm is

generated

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

TEMP IN ELECT BOARD EXCEEDED 58℃

AL52

ETACOM AMBIENT

TEMP HAS RISEN

Alarm is

displayed.

Remedies

CHECK/ADJUST AMB TEMP

Buzzer sounds

intermittently.

Note

This alarm occurs if ambient temperature around the ETACOM (temperature/humidity controller) exceeds

58 ℃.

[Inspection procedure] Press the > key to continuously display the ambient temperature using the local controller and observe changes in ambient temperature. If necessary, turn on an air-conditioner or ventilate the

air inside the room where the chamber is placed. (For more details about display, please refer to “P34

Displaying the status of equipment/instrument”.

【Remark 1】 Maintain the room temperature of the installation site within the range of ＋10℃ to +32℃

around the temperature control instruments in the electric board increases, causing the protective device to trip and shut down the instruments. On the other hand, if an ambient temperature falls below +0℃,

humidification water in the water circuit will freeze, or overcooled refrigerant which circulates inside the refrigeration circuit may cause a breakdown.

【Remark 2】 Although the ambient temperature measurement sensor (T thermocouple) is placed at the

bottom of the chamber where air is well circulated,ndepending on the operation conditions of the refrigerator, higher temperature than the actual ambient temperature (2 to 3 ℃) may be indicated.

● When AL52 is displayed

Page 75

Messages to be displayed when alarm is

generated

Possible causes and diagnosis * In the case of the remote

controller, clicking the number will indicate the causes and

remedies.

Functions to be

activated

Local controller

LED display

Messages appear in the remote

controller's browser

Causes

NO WATER IN WICK PAN

AL72

WICK GAUZE DRY

WICK GAUZE POOR ABSORPTION

WICK GAUZE MISSING

Alarm is

displayed.

Remedies

READJUST LEVEL CONTROLLER

Buzzer sounds

intermittently.

EXCHANGING WICK GAUZE

ATTACH WICK GAUZE

Note

This alarm is displayed when wet bulb (WB) temperature cannot be controlled during a temperature/humidity operation. (For example, measured humidity is 99% even though the humidification heater output

is 0%.)

This alarm occurs if the wick gauze is dirty or missing, or water is not supplied to the wick pan.

[Inspection procedure] ① Check if there is water in the plastic pipe (wick pan) in which wick gauze is soaked during a temperature/humidity operation. If there is not water in the wick pan; Check the position of the float inside the water level controller (transparent plastic cup). If the

float is caught halfway, turn off the earth leakage breaker, open the panel on the right side, open the water level controller’s cover, then place the float back to the original position.

If the float is dirty, wipe off the dirt with a clean cloth. If the chamber was moved to a new location, check the levelness, etc. ⑤ If the float is not caught in halfway, this problem is caused by water level control failure. Loosen the float switch screws fixed on the water level controller's cover, turn the float switch counterclockwise, then push it upwards by one rotation.

Tips for troubleshooting

● When AL72 is displayed

Page 76

Messages to be displayed when alarm is generated

Possible causes and diagnosis * In the case of the remote controller, clicking the number will indicate the causes and remedies.

Functions to be activated

Local controller LED display

Messages appear in the remote controller's browser

Causes

FLOAT SWITCH (FS1L OR FS2) BROKEN

AL73

INSUFFICIENT HUMID WATER

SV2 MALFUNCTIONS

Water supply stops.

WATER PUMP MALFUNCTIONS

Alarm is displayed.

Remedies

CHECK/CHANGE FLOAT SWITCH

Buzzer sounds intermittently.

CHECK/CHANGE SV2

CHECK/CHANGE WATER PUMP

Note

Although the humidification water level in the humidification pan inside the chamber is low during a temperature/humidity operation, the water level does not recover for more than 10 minutes. While an alarm

goes off, water supply is stopped although the operation is continued.

● FLOAT SWITCH (FS1L OR FS2) BROKEN

Typical failure modes are as follows.

a) The float switch FS1L inside the subtank is caught halfway at the OFF position due to scale, and there is

no water in the subtank.

(=> Because the float switch is at the OFF position, the pump moves as if there is water inside the

subtank.

However, the water level of the humidification pan level controller does not go up and thus, AL73 is

displayed.)

b) The float switch FS2 inside the humidification pan level controller is caught halfway at the ON position

due to scale. (=> Therefore, a rise in water level is not detected even though water is supplied,

and as a result, AL73 is displayed. Oversupplied humidification water will be drained out from the overflow line.

● WATER PUMP MALFUNCTIONS

Typical failure modes are as follows. a) The pump is clogged. b) The pump diode is faulty. c) The valve ball inside the discharge valve is stuck.

● SV2 MALFUNCTIONS

Typical failure modes are as follows. a) The solenoid valve is clogged. b) The solenoid valve's coil is disconnected and the valve does not open.

[Inspection procedure]

1) Turn off the main power.

2) Check the water level in the humidification pan placed at the rear of the chamber.

3) Open the top and bottom service panels on the right side of the chamber.

4) Open the subtank cover, check the water level, and perform diagnosis according to the following procedure by referring to "Table A - AL73 diagnostic table".

Check if any float switch is caught halfway due to scale or slime. Even if the float switch is back to normal position by chance, clean inside the subtank and level controller with a clean cloth in order to prevent reoccurrence.

- Caution -

This alarm needs to be reset first in order to release. However, if the alarm is reset without fixing

the problem, AL73 will light up again in 10 minutes.

Tips for troubleshooting

Water level

Movement of the float Water level

● When AL73 is displayed

Page 77

AL73 (Continued from the previous page)

Turn on the earth leakage breaker as well as the main power, and reset the error. ③ Use the local controller to set at 20℃, 00%, start a temperature operation, and drain out humidification water inside the humidification pan. After humidification is completely drained out, set and start a

temperature/humidity operation.

Once water supply is started, move the float (FS1L) inside the subtank up and down by hand and check the sound of the water supply solenoid valve (SV1). (Please note that moving the float FS1H located in the

upper part inside the subtank will trigger Er27 "SUBTANK FULL" causing the chamber to stop.)

Move the float (FS2) inside the level controller up and down by hand and check the sound of the water pump.

(Please make sure that humidification water will not overflow from the level controller.)

⇒ If the solenoid valve does not sound "click, click" when the float moves up and down, or if water pump's vibration sound (bububu) cannot be heard, please stop the operation because either the float switch, solenoid valve control circuit (relay or temperature/humidity controller relay output), or water pump is faulty.

=> If a humidity operation is not performed for a long time, inside the discharge valve of the water pump becomes dry, and in some cases the valve ball may be stuck. If the valve ball inside the discharge valve is stuck, humidification water cannot be pumped up and there is hardly any sound even when electricity is supplied. In such a case, pressing down the lower tube many times by hand and forcibly pushing water upward during an operation of the water pump may fix this problem.

Humidification

pan

water level

Subtank

water level

Probable causes

CASE1

Sufficient

a. Either contact point of the float switch FS2 may be faulty or the float may be caught halfway at the ON position due to scale, etc.

CASE2

Sufficient

Insufficient

b. Either contact point of the float switch FS1L may be faulty or the float may be caught halfway at the Off position due to scale, etc.

a. Either contact point of the float switch FS2 may be faulty or the float may be caught halfway at the ON position due to scale, etc.

CASE3

Insufficient

Sufficient

c. The water pump malfunctions. d. The solenoid valve (SV2) malfunctions. Either one of the above may be causing the problem.

CASE4

Insufficient

b. Either contact point of the float switch FS1L may be faulty or the float may be caught halfway at the Off position due to scale, etc. c. The water pump malfunctions. d. The solenoid valve (SV2) malfunctions. Either one of the above may be causing the problem.

- Caution -

When resuming a temperature/humidity operation after a long break (for more than one month), be sure to check the water feed/discharge function by repeating the water feed/discharge test about twice.

Table A - AL73 diagnostic table

Page 78

Messages to be displayed when an alarm

is generated

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

HUMID WATER DETERIORATED

AL75

HUMID WATER HAS

DETERIORATED

HUMID WATER MONITOR MALFUNCTIONED (OPTIONAL)

Alarm is displayed.

Remedies

IMPROVE HUMID WATER QUALITY

Buzzer sounds

intermittently.

MEASURE WATER CONDUCTIVITY

Note

Conductivity of humidification water is over 10μS/ cm.

● HUMID WATER DETERIORATED

⇒ Make sure to use clean humidification water such as ion-exchanged water with electric conductivity of less

than 0.1 to 10μS/cm or pure water. ⇒ Please change existing water purifier with a new one, if applicable.

If normal tap water is supplied directly, the life of the humidification heater or wick gauze may become significantly shorter. Quality of humidification water will greatly affect the life of various components inside the chamber as well as reliability test results. Deterioration of water quality will cause scale to deposit inside the humidifying pan, shortening the life of the humidification heater. At the same time, water absorbency of a wick will weaken, resulting in larger measurement deviation of humidity. (See below)

● HUMIDIFYING WATER MONITOR FAILURE

When possible, measure the conductivity inside the water tank or subtank. If conductivity is less than

20μS/cm, the humidification water monitor might have malfunctioned or become defective.

Tips for troubleshooting

Adverse effect caused by deterioration of

Deterioration of

humidification water

or wet bulb water

Corrosion of

humidification heater

Poor water

Increased humidity uncertainty

Acidification of the atmosphere

Scattered scale

・Shortened service life of equipment/instruments ・Malfunctioned equipment/instruments

Corrosion of the chiller

Deterioration of wick gauze

● When AL75 is displayed

Page 79

Messages to be displayed when alarm is

generated

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

POWER FAILURE

AL84

POWER FAILURE

DISCONNECT BREAKER BEFORE POWER SW

Alarm is

displayed.

Remedies

RESET ERROR AND RESUME OPERATION

Buzzer sounds

intermittently.

Note

This alarm is indicated when power recovered after power failure, or when the breaker is

disconnected before power SW is disconnected when the power supply to the chamber is cut off.

Reset the alarm and then press the START switch to resume an operation.

[Remark 1]

In order to avoid any potential risks which may be caused by a "sudden start", the chamber operation will be temporarily suspended after power recovery from power failure. (Automatic restart prevention function after power failure)

[Remark 2]

When selecting the optional post-power failure immediate restart function, please understand various possible hazards of the "automatic recovery function"

(risk source) as well as "sudden start" (risky event), and use this function carefully.

Messages to be displayed when alarm is

generated

Possible causes and diagnosis * In the case of the

remote controller, clicking the number will indicate the

causes and remedies.

Functions to be

activated

Local

controller

LED display

Messages appear in the remote

controller's browser

Causes

DUE FOR CLEANING

AL86

CLEAN FILTER

Alarm is

displayed.

Remedies

CLEAN ANTI-DUST FILTER

Buzzer sounds

intermittently.

Note

This error is periodically generated every six months. Open the front panel, take out the filter and vacuum dust with a vacuum cleaner, wash with water, then dry completely before reattaching the filter.

Filter

● When AL84 is displayed

● When AL86 is displayed

Page 80

● Troubleshooting problems without error/alarm display

◇ Chamber operation does not start by pressing the RUN/STOP button.

⇒ Is the chamber operated by using the remote controller? If the chamber is paused by the remote controller by

which settings are performed, the operation cannot be resumed by using the local controller. In order to resume the

operation, please use the remote controller.

◇ Temperature does not rise during the test.

=> The thermal heater may be disconnected or the temperature/humidity controller may be faulty. For details,

please refer to "Remedies" section of "When Er06 is displayed".

◇ Temperature does not rise.

=> The thermal heater may be disconnected or the temperature/humidity controller may be faulty. For details,

please refer to "Remedies" section of "When Er50 is displayed".

◇ Temperature and humidity do not decrease during the test.

=> Possible causes are; refrigeration system is faulty, heat load of specimens increased, ambient temperature

increased, or the chiller inside the chamber is frosted.

For details, please refer to "Remedies" section of "When Er7, 8, or 9 is displayed" or "When ER11, 12, or 13 is

displayed". If frosted, please perform a defrost operation (See P.41 ■ Defrosting Method).

◇ Window lamp does not light up.

⇒ The window lamp may be blown. Please change the window lamp or grow lamp. For details on how to change the

lamp, please refer to "■ Expendable Parts".

◇ Condensation or clouding occurs on the surface of viewing window.

⇒ The heater circuit of the observation window may be disconnected. In order to prevent condensation, a film

heater is attached on the surface (inner side) of the window glass and the cord heater is attached around the

window glass. If these heaters are disconnected or the overcurrent protection fuse blows out, condensation will

occur. Touch the surface of the window glass by hand. The surface should be warm if the heater circuits are

functioning normally.

If the fuse (2A) is blown, it needs to be replaced. Please contact our customer support center.

Page 81

◇ Use of the humidification water is extremely large.

⇒ There are a few possible causes such as water level adjustment is defective, malfunctioning, or cable port is not

properly sealed. Please check and adjust water level of the humidification pan and wick pan. For more details,

please refer to "■ Maintenance and Inspection".

◇ The earth leakage breaker tripped.

⇒ This is caused by poor insulation of the humidification heater, refrigerator, etc. Detailed inspection of the device

needs to be conducted. Please stop operation and contact our customer support center.

Page 82

■ Restarting Operation after Power Failure

When the power is restored after power failure occurred, the chamber will display "AL84" and operation will not resume automatically. Press the

start button on the local controller or remote controller in order to resume an operation from the step where the operation is

previously stopped. Reset the alarm in order to turn off the alarm code display.

【Remark 1】 In order to avoid any potential risks which may be caused by a "sudden start", the chamber operation will be temporarily

suspended after power recovery from power failure. (automatic restart prevention function after power failure)

【Remark 2】 Before selecting the automatic restart function after power failure (optional), please carefully examine possible hazards which may

be caused by "abrupt resume of operation" (risk factor).

Page 83

Check Points

Description

Earth leakage

breaker

(Main power switch)

Press the test button in order to check the operation

of the earth leakage breaker.

Wet bulb gauze wick

Replace with a new gauze wick.

Drainage and

cleaning of the

subtank

Open the service panel.

② Open the cock near the subtank by turning it 90 degrees (it is open when it is aligned with the pipe)..

Water flows out.

Once water is completely drained out, turn the cock back to the original position.

CAUTION

If a humidity test is started with the cock opened, water will not be supplied. When not using

the chamber for more than one month, make sure to drain out water from the subtank. Keep

inside the subtank always clean as any foreign particles in the tank may clog the solenoid

valve or water pump, causing breakdown of the chamber.

Test button

Service panel

Subtank

Cock

Subtank wick pan

Gauze wick

■ Maintenance and Inspection

○ Check points for 1st month inspection

Page 84

Cleaning of

refrigerator

condenser filter

Open the front panel, take out the filter and vacuum dust with a vacuum cleaner, wash with

water, then dry completely before reattaching the filter.

* Operating without the filter attracts dust into the condenser fins and it may cause

deterioration in performance.

Make sure that the filter is attached whenever operating the chamber.

Cleaning of

humidification pan

Operating humidity tests for a long period will cause white solid material to gather around the

humidification pan and humidification heater.

Continuing the operation in such a state will cause a

malfunction of the humidification heater. Moreover, excess

formation of white solid material

on the humidification heater may affect purity of

the humidification water. Clean it off with a soft cloth

and check the purity of the water.

Check Points

Description

Cleaning of wick pan

(FX type)

Drain out water and wipe the wick pan with a soft cloth. Do not clean it too hard as it may cause

damage of the pan.

Velcro straps

Humidification pan

○ Check points for 3rd month inspection

* At the same time, go through inspection items listed for the 1st month when conducting the 3rd month inspection.

Page 85

Check Points

Description

Performance of

overheat protector

Maintain the temperature inside the chamber at ＋90℃.

Open the service panel at the back of the chamber.

There are dials for the “overheat protector” and

“boil-dry cut-off device”. These instructions slightly

differ depending on the model.

By turning the overheat protector dial counterclockwise, lower the set

temperature gradually. If an error is triggered between ＋80℃

and 100℃, it is normal.

Factory default value: + 110 ℃ (+180 ℃ for 150 ℃ specification

model)

When opening the service panel during the operation for

inspections, take necessary caution against electrical shocks,

burns, and injuries.

Performance of

boil-dry cut-off device

① Maintain the temperature inside the chamber at ＋90℃.

② Open the service panel at the back of the chamber.

③ There are dials for the “overheat protector” and “boil-dry cut-off

device”. These instructions slightly differ depending on the

model.

④ Lower the set temperature of the boil-dry cut-off

device gradually. If an error is triggered between

＋80℃ and 100℃, it is normal. After the test,

return the temperature to the original value and reset the

alarm.

Factory default value: +200℃

* When opening the service panel during the operation for

inspections, take necessary caution against electrical

shocks, burns, and injuries.

Overheat protector

Boil-dry cut-off device

Overheat protector

Boil-dry cut-off device

○ Check points for 6th month inspection

* At the same time, go through inspection items listed for the 1st and 3rd month.

Page 86

Check Points

Description

"Temperature/humidity

calibration”

Calibrate indicated temperature and humidity values.

① Check all protective devices.

② Check operation of each instrument (measure operation current, check for abnormal

sound, etc.).

③ Measure insulation resistance.

④ Calibrate temperature.

⑤ Including cleaning of the machine room and inside the chamber, it is recommended to

contact our customer support center to engage a professional engineer in order to

conduct comprehensive inspection as mentioned above.

Check Points

Description

Checking and

adjusting water level

in the humidification

pan

Adjust the water level so that its surface is maintained 5mm below the bottom of the test area.

The water level inside the humidification pan can be adjusted by loosening the ① screw and

moving it up and down.

* Make sure that the water level is stabilized before checking or adjusting its level. (15 minutes

after a temperature/humidity test is started)

* When opening the service panel during the operation for adjustment, take necessary

caution against electrical shocks, burns, and injuries.

Checking and

adjusting water level

in the wick pan

If water overflows from the wick pan inside the chamber, the position of the float switch inside

the level controller is too high. Remove the cover and loosen the nut of the level controller in

order to lower the position.

On the contrary, if the wick is dry, the position

of the level controller is too low. Remove the

cover and loosen the nut of the level

controller in order to raise the position.

* Make sure that the water level is stabilized

before checking or adjusting its level.

(15 minutes after a temperature/humidity test is started)

* When opening the service panel during the operation for adjustment, take necessary

caution against electrical shocks, burns, and injuries.

Humidification pan

○ Check points for 1st year inspection

○ Inspection upon Relocation

* At the same time, go through inspection items listed for the 1st and 3rd month.

Page 87

Name of parts

Time for replacement

Replacement method

Wet bulb gauze

wick

(FX type)

・ Within one month or

when it is dirty or

stiffened.

・ After a temperature

operation is performed at

100℃ or higher.

* If a temperature operation is performed at +100℃ or higher, the wick gauze will

harden and its water absorption performance will be affected.

Room lamp

When the fluorescent

bulb is blown

① Turn off the earth leakage breaker.

② Remove the four rubber bushes and fixing screws that secure the viewing

window frame.

③ Pull out the window frame upwards to your side.

④ Change the fluorescent lamp. (Hold the fluorescent lamp with your

right hand, ① push it to the left, ② rotate it counterclockwise,

and ③ remove it by pulling it to the right.)

* Fluorescent lamp model number : FPL9EX-N

* Please be aware that the window frame, screws, and observation

window glass can be very hot immediately after an operation.

* While exchanging the fluorescent bulb, please be careful not to touch

metal fittings.

Room lamp

When the grow lamp

is blown

① Turn off the earth leakage breaker.

② Open the front service panel on the right side.

③ Exchange the glow lamp on the electrical board.

* Grow lamp model number: FG-7E

* The position slightly differs depending on the model.

* The models that come with two viewing windows have two grow lamps.

Grow lamp

Wick pan

Gauze wick

■ Expendable Parts

Page 88

Name of parts

Time for replacement

Replacement method

LED lamp

(To check water

level inside the

water tank.)

If the LED lamp blows

off

① Turn off the earth leakage breaker.

② Open the front service panel at the bottom.

③ Remove the water tank.

④ Remove the LED lamp at the upper right from the socket, and replace with

a new LED lamp.

Door packing

When steam is found

escaping from the

door due to cracks or

wear and tear of the

packing.

Exchange with a new door packing.

* Please contact us when replacement is needed as it requires special

skills.

Silicon sheet

(Optional)

If the hardened or

cracked silicon sheet

is posing a problem

for handling

specimens.

If an optional inner door with glove ports is attached, a milk-white silicon

sheet can be fixed.

Remove the 3mm screws to exchange the silicon sheet.

Page 89

Name of items

Estimated service life

Remark

Temperature &

humidity controller

About 24,000 hours

Electrical components

About 24,000 hours

Refrigeration unit

About 20,000 hours

The service life varies greatly depending on the test

temperature, etc.

Circulation fan unit

About 20,000 hours

Temperature sensor

About 40,000 hours

Water level adjustment

float switch

About 18,000 hours

(FX series only)

Humidification heater

About 18,000 hours

(FX series only) The service life varies greatly depending on

the water quality.

Thermal heater

About 18,000 hours

Plunger pump

About 20,000 hours

This needs to be regularly changed once in three

years. (FX series only)

Purifier (optional)

About 8 months if

continuously operated

at 85℃, 85%RH.

If the electrical conductance of the primary water is 200μ

s/cm, the purifier can treat 950 liters of water.

■ Expected service life of major parts

Note) The above service life was estimated based on the assumption that the chamber is used under certain

temperature conditions. Therefore, it can be significantly different depending on the operating environment or test

temperature. The above estimated service life is not included under the guarantee period.

Page 90

No.

Name of parts

Material

Name of material

Temperature/humidity controller

(door)

ABS / PC

Acrylonitril-butadiene-styrene

Level controller (main body)

Polypropylene

Level controller (cap)

Polypropylene

Water tank

Polyethylene

Insulation material between inner

box and outer box

PUR foam

Poluurethane (Isocyanurate)

Insulating material for cooling pipe

(black)

NBR foam

Acrylonitril-butadiene-rubber

Doorplate

ABS / PC

Acrylonitril-butadiene-styrene

■ Warranty Coverage

This product went through stringent internal inspections before shipment. However, should this product break down due to

manufacturing defects, please contact us or the shop you purchased it from.

We will fix any defects which occurred within the warranty period at no cost.

However, please note that in the following cases, the above-mentioned warranty terms are not applicable.

◇ If the product broke down due to performing any acts other than those stated in this operation manual;

◇ If the product broke down due to performing prohibited acts as stated in this operation manual;

◇ If the product breaks down due to careless handling;

◇ If the product breaks down due to an unauthorized alteration; or

◇ If the product broke down because of the specimens placed inside or the gas generated from the specimens.

◇ If the cause of failure cannot be clearly identified as being directly caused by manufacturing defects.

* Any parts of this operation manual may be amended / changed without notice.

■ Materials of Parts

Page 91

◆ Schematic Diagram of entire system

Page 92

Evaporating coil

Expansion valve

Solenoid valve Dryer

Refrigerant : HFC404A 1700g

Pressure switch : 2.9Mpa

DC Inverter

Refrigerator

◆ Schematic Diagram of refrigeration system ( FX/ FL410N, 420N )

Page 93

◆ Schematic Diagram of water circuit

Page 94

Temperature Control

Temperature/ Humidity Control

Refrigerator Set mode

Model No

Refrigerator Set mode

Model No

Set temperature(

℃

)

Set temperature(

℃

)

◆ Operable range of for refrigerator auto/manual operation

Note) When manually operating temperature/humidity test, make sure to use REF1 regardless of the model.

Page 95

Model No

FX410N

FX420N

FX430N

Performance ( Note 1, Note 2, Note 3)

Temperature range

-40℃ to +100℃ 【-40℃ to +150℃】

Humidity range

20 to 98%rh (refer to P103 ◆ Temperature / humidity control range Controllable temperature / humidity range)

Temperature ramp-up rate

From -40℃ to +100℃ 【from -40℃ to +150℃】

Within 45【60】minutes

Within 50【75】minutes

Within 45【65】minutes

Temperature ramp-down rate

From ＋20℃ to -40℃

Within 40 minutes

Within 45 minutes

Within 40 minutes

Temperature rate of change (increase)

From -26℃ to +86℃ 【-21℃ to +131℃】

3.5℃/minute【3.5℃/minute】

3.0℃/minute【2.5℃/minute】

4.0℃/minute【3.5℃/minute】

Temperature rate of change (decrease)

From +86℃ to -26℃ 【+131℃ to -21℃】

3.5℃/minute【3.5℃/minute】

3.0℃/minute【3.5℃/minute】

3.5℃/minute【4.0℃/minute】

Temperature / humidity fluctuation

±0.3℃ /±2.5%rh 【±0.5 ℃ (100.1℃ to 150℃)】

Temperature/humidity gradient

Temperature test: 3.0℃【5.0℃ (100.1℃ to 150℃)】, temperature/humidity test: 1.5℃ / 5.0%rh

Temperature/humidity deviation

Temperature test: 2.5℃【3.0℃ (100.1℃ to 150℃)】, temperature/humidity test: 1.5℃ / 5.0%rh

Operable ambient temperature range

+5℃ to +40℃

Main body

Internal dimensions (W×H×D mm)

600x750x600

700x950x700

1000x1000x800

Capacity (liter)

270

465

800

External dimensions (W × H × D mm)

880x1683x1190

980x1883x1290

1280x1933x1390

Weight (kg)

315

378

543

Exterior material

Bonderized steel plate (baking finish)

Interior material

Stainless steel plate (SUS304)

Main units

Circulation fan

Sirocco fan

Refrigerator:

DC i n v e r t e r -controlled a i r -cooled r o t a r y c o m p r e s s o r

DC inverter-controlled air-cooled rotary compressor and constant-rate air-cooled rotary compressor

Refrigerant:

R404A

Thermal heater

Nichrome strip heater

Humidification heater

Sheathed heater (SUS316L)

Chiller

Plate fin coil

Condenser

JIS C 1604 three-wire resistance temperature sensor Pt100

Temperature

/humidity controller

Control system:

PID control

Display type

LED display

Display resolution

0.1℃ / 1%rh

Setting method

Key-in method using the main body controller / key-in method using the commercial terminal with web browser

Memory capacity

4 G B

Interface E t h e r n e t

10BASE-T/100BASE-TX, compatible with AUTO-MDIX, RJ45 connector x1 channel

U S B

USB2.0 TYPE A connector x 2 channels

Faci lities needing preparation by users

Power supply

AC200V 3φ 50/60 Hz, voltage variation range: ±10%, D-class earth

Humidificatio n w a t e r

Ion exchanged water or pure water (0.1 to 10μS/cm)

M ax im um l o a d c u r r e n t ( A )

25A

41A

O p e r a t i n g c u r r e n t ( A )

20A

Amount o f e x h a u s t heat ( k W )

0.5 to 4.8

0.5 to 7.1

P r o t e c t i v e D e v i c e

Main power source earth leakage breaker, fan motor overload relay, boil-dry cut-off device, overheat protector, refrigerator pressure switch, refrigerator overload relay, refrigerator overheat protector, primary power source reverse phase detector, thermal heater overload protection fuse, humidification heater overload protection fuse, control circuit overload protection fuse, sensor disconnection detection function, upper/lower temperature limit warning function, inverter abnormality detection function, power failure notification alarm, filter cleaning alarm, wick gauze dry alarm, water tank low water level alarm

A d d i t i o n a l f u n c t i o n s

turn-off function, refrigerator manual operation function, error log automatic saving function, synchronized operational status recording function, delayed humidification function, post-test operation function

◆ Specifications for low temperature & humidity chamber FX type (- 40 ℃)

Descriptions inside 【】 are for 150 ℃ specification (optional)

Page 96

Standard equipment

M a i n b od y

RJ45 connector for Ethernet, round cable port (φ 54, two ports on right and left sides), viewing window (type 10 and 20 - usable dimension: W210xH303 mm, type 30 - usable dimension: W420xH303 mm), window lamp, water tank LED light, caster/adjuster, refrigerator condenser anti-dust filter, humidification vapor collection system,

AC100V plug socket(3A), etc.

Ac c essor i es

Operation manuals (1 set), silicon plugs for φ54 cable port (2), shelf board (1), shelf brackets (2), portable tank (type 10 and 20: 10 liter x 1, type 30: 10 liter x 2), wick gauzes (12), test certificate

【Note 1】 Performances are guaranteed when ambient temperature is +23℃, rated voltage is used, and no specimens are placed inside the

chamber. Indication method conforms with "JTM K 09: Temperature/humidity chamber performance testing method and performance indication system."

【Note 2】 If temperature at the installation site falls below +5℃ or exceed +40℃, alarm may go off or an operation may be stopped indicating an

error in order to prevent humidification water from freezing or to protect devices from an excessively hot environment.

【Note 3】 If temperature at the installation site exceeds 35℃, minimum temperature may not be maintained. 【Note 4】 Operating current (A) is the maximum current value that can be reached during a normal temperature and humidity test. 【Note 5】 Maximum load current (A) is the maximum current that flows when all apparatuses are concurrently turned on, and this is used to

determine the specifications of primary side equipment.

* Please note that the specifications are subject to change for improvement or upgrading without any prior notice.

Page 97

Model No

FX710N

FX720N

FX730N

Pe rfor man c e ( No t e 1, Note 2, No te 3 )

Temperature range:

-70℃ to +100℃ 【-70℃ to +150℃】

Humidity range

20 to 98%rh (refer to P103 ◆ Temperature / humidity control range Controllable temperature / humidity range)

Temperature ramp-up rate:

From -70℃ to +100℃ 【from -70℃ to +150℃】

Within 55【75】minutes

Within 70【90】minutes

Within 50【75】minutes

Temperature ramp-down rate

From ＋20℃ to -70℃

Within 90 minutes

Within 100 minutes

Temperature rate of change (increase)

From -53℃ to +83℃ 【-48℃ to +128℃】

3.0℃/minute【3.0℃/minute】

2.5℃/minute【2.5℃/minute】

3.5℃/minute【3.0℃/minute】

Temperature rate of change (decrease)

From +83℃ to -53℃ 【+128℃ to -48℃】

2.0℃/minute【2.0℃/minute】

1.5℃/minute【1.5℃/minute】

Temperature / humidity fluctuation range

±0.3℃ /±2.5%rh 【±0.5 ℃ (100.1℃ to 150℃)】

Temperature/humidity gradient

Temperature test: 3.0℃【5.0℃ (100.1℃ to 150℃)】, temperature/humidity test: 1.5℃ / 5.0%rh

temperature/humidity deviation

Temperature test: 2.5℃【3.0℃ (100.1℃ to 150℃)】, temperature/humidity test: 1.5℃ / 5.0%rh

Operable ambient temperature range

+5℃ to +40℃

M a i n b o d y

Internal dimensions (W×H×D mm)

600x750x600

700x950x700

1000x1000x800

Capacity (liter)

270

465

800

External dimensions (W × H × D mm)

880x1683x1190

980x1883x1290

1280x1933x1390

Weight (kg)

405

468

633

Exterior material

Bonderized steel plate (baking finish)

Interior material

Stainless steel plate (SUS304)

M a i n u n i t s

Circulation fan

Sirocco fan

Refrigerator:

DC inverter-controlled air-cooled rotary compressor and constant-rate rotary compressor (two-stage refrigeration system)

Refrigerant:

R404A + R23

Thermal heater

Nichrome strip heater

Humidification heater

Sheathed heater (SUS316L)

Chiller

Plate fin coil

Condenser

JIS C 1604 three-wire resistance temperature sensor Pt100

T e m p e r a t u r e

/humidity controller

Control system:

PID control

Display type

LED display

Display resolution

0.1℃ / 1%rh

Setting method

Key-in method using the main body controller / key-in method using the commercial terminal with web

browser

Memory capacity

4GB

Interface Ethernet

10BASE-T/100BASE-TX, compatible with AUTO-MDIX, RJ45 connector x1 channel

USB

USB2.0 TYPE A connector x 2 channels

Facilities needing preparation by users

Power supply

AC200V 3φ 50/60 Hz, voltage variation range: ±10%, D-class earth

Humidificati on water

Ion exchanged water or pure water (0.1 to 10μS/cm)

Maximum load current (A)

33A

35A

43A

Operating current (A)

20A

Amount of exhaust heat (kW)

0.5 to 5.0

Protective Device

Additional functions

Memory backup function, pause function, monitoring function, self-diagnosis function, automatic restart prevention function after power failure, momentary power failure backup function, external warning output terminal, test completion output function, time signal output function, wait function, power interlocking function to protect specimens, auto-start / timer function, room light automatic turn-off function, refrigerator manual operation function, error log automatic saving function, synchronized operational status recording function, delayed humidification function, post-test operation function

Standard equipment

Main body

AC100V plug socket(3A), etc.

◆ Specifications for low temperature & humidity chamber FX type ( - 70 ℃)

Descriptions inside 【】 are for 150 ℃ specification (optional)

Page 98

Accessories

【Note 1】 Performances are guaranteed when ambient temperature is +23℃, rated voltage is used, and no specimens are placed inside the

chamber. Indication method conforms with "JTM K 09: Temperature/humidity chamber performance testing method and performance indication system."

【Note 2】 If temperature at the installation site falls below +5℃ or exceed +40℃, an alarm may go off or an operation may be stopped indicating

an error in order to prevent humidification water from freezing or to protect devices from an excessively hot environment.

determine the specifications of primary side equipment.

* Please note that the specifications are subject to change for improvement or upgrading without any prior notice.

Page 99

Model No

FL410N

FL420N

FL430N

Performance ( Note 1, Note 2, Note 3)

Temperature range:

-40℃ to +100℃ 【-40℃ to +150℃】

Temperature ramp-up rate:

From -40℃ to +100℃ 【from -40℃ to +150℃】

Within 45【60】minutes

Within 50【75】minutes

Within 45【65】minutes

Temperature ramp-down rate

From ＋20℃ to -40℃

Within 40 minutes

Within 50 minutes

Temperature rate of change (increase)

From -26℃ to +86℃ 【-21℃ to +131℃】

3.5℃/minute【3.5℃/minute】

3.0℃/minute【2.5℃/minute】

4.0℃/minute【3.5℃/minute】

Temperature rate of change (decrease)

From +86℃ to -26℃ 【+131℃ to -21℃】

3.5℃/minute【3.5℃/minute】

3.0℃/minute【3.5℃/minute】

3.5℃/minute【4.0℃/minute】

Temperature fluctuation range

±0.3 ℃ 【±0.5℃ (100.1 ℃ to 150 ℃)】

Temperature gradient

3.0℃【5.0℃ (100.1℃ to 150℃)】

temperature deviation

2.5℃【3.0℃ (100.1℃ to 150℃)】

Operable ambient temperature range

+5℃ to +40℃

Main body

Internal dimensions (W×H×D mm)

600x750x600

700x950x700

1000x1000x800

Capacity (liter)

270

465

800

External dimensions (W × H × D mm)

880x1683x1190

980x1883x1290

1280x1933x1390

Weight (kg)

305

368

533

Exterior material

Bonderized steel plate (baking finish)

Interior material

Stainless steel plate (SUS304)

Main units

Circulation fan

Sirocco fan

Refrigerator:

DC inverter-controlled air-cooled rotary compressor

DC inverter-controlled air-cooled

rotary compressor and

constant-rate air-cooled rotary

compressor

Refrigerant:

R404A

Thermal heater

Nichrome strip heater

Chiller

Plate fin coil

Condenser

JIS C 1604 three-wire resistance temperature sensor Pt100

Temperature

controller

Control system:

PID control

Display type

LED display

Display resolution

0.1 ℃

Setting method

Key-in method using the main body controller / key-in method using the commercial terminal with web browser

Memory capacity

4GB

Interface Ethernet

10BASE-T/100BASE-TX, compatible with AUTO-MDIX, RJ45 connector x1 channel

USB

USB2.0 TYPE A connector x 2 channels

Facil iti es n eeding preparation by users

Power

supply

AC200V 3φ 50/60 Hz, voltage variation range: ±10%, D-class earth

Humidificati

on water

Ion exchanged water or pure water (0.1 to 10μS/cm)

Maximum load current (A)

20A

33A

Operating current (A)

13A

24A

Amount of exhaust heat (kW)

0.5 to 4.8

0.5 to 7.1

Protective Device

Main power source earth leakage breaker, fan motor overload relay, overheat protector, refrigerator pressure switch, refrigerator overload relay, refrigerator overheat protector, primary power source reverse phase detector, thermal heater overload protection fuse, control circuit overload protection fuse, sensor disconnection detection function, upper/lower temperature limit warning function, inverter abnormality detection function, power failure notification alarm, filter cleaning alarm

Additional functions

Standard equipment

Main b o d y

AC100V plug socket(3A), etc.

Accessories

◆ Specifications for low temperature chamber FL type ( - 40 ℃)

Descriptions inside 【】 are for 150 ℃ specification (optional)

Page 100

【Note 1】 Performances are guaranteed when ambient temperature is +23℃, rated voltage is used, and no specimens are placed inside the

chamber. Indication method conforms with "JTM K 07: Temperature chamber performance testing method and performance indication

【Note 2】 If temperature at the installation site falls below +5℃ or exceed +40℃, an alarm may go off or an operation may be stopped indicating

* Please note that the specifications are subject to change for improvement or upgrading without any prior notice.

system."

an error in order to prevent humidification water from freezing or to protect device from excessively hot environment.

determine the specifications of primary side equipment.

100

Etac HIFLEX NEO Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual