SANYO MCO-18 AIC CO2 incubator Service Manual

Service Manual

CO

2

Incubator

MCO-18AIC

FILE No.

SM9910023

Contents

Page

Features ................................................................................................................................ 1

Structural specification .......................................................................................................... 2

Performance specification ..................................................................................................... 3

Control specification .............................................................................................................. 4

Dimensions........................................................................................................................ 5

∼6

Electrical parts....................................................................................................................... 7

Temperature calibration ........................................................................................................ 8

CO

2

calibration ...................................................................................................................... 9

Control specification ...................................................................................................... 10

∼19

Wiring diagram .................................................................................................................... 20

Circuit diagram .................................................................................................................... 21

Components on PCB........................................................................................................... 22

Connection on PCB............................................................................................................. 23

CO

2

gas circuit .................................................................................................................... 24

Prevention of contamination................................................................................................ 25

Auto zero adjustment .................................................................................................... 26

∼27

Specifications of sensor ...................................................................................................... 28

Parts layout ................................................................................................................... 29

∼31

MCO-18UVS installation procedure .............................................................................. 32

∼35

Mounting procedure of MCO-21GC .............................................................................. 36

∼39

How to replace water level sensor ...................................................................................... 40

MCO-18PS installation procedure................................................................................. 41

∼42

MCO-18SB Setting procedure............................................................................................. 43

MCO-21SB Setting procedure............................................................................................. 44

Instruction manual ............................................................................................................... 45

Effective models

This service manual is effective following models.

Model name Model code

MCO-18AIC 823 279 51

823 279 52

823 279 53

823 279 54

823 279 56

Voltage and Frequency

115V

220V

220V

230V

230V

60Hz

50Hz

60Hz

50Hz

50Hz

Features

1. PID control with micro-computer.

This unit has PID control (Proportional Integrate Differential) accurate controls internal temperature, as well as air sensor system monitoring internal temperature.

2. Infrared CO

2

sensor installed.

Infrared CO

2

sensor is not affected by humidity.

3. UV sterilization system (

Option)

Water and the circulating chamber air in the humidifying pan are sterilized by UV lamp.

Optional setting of light mode is available.

4. Rounded Ball corners.

Inside chamber wall made by stainless steel and its corner made rounded type.

This made cleaning easier and de-contamination.

5. Reduce contamination.

Inside chamber material is made by anti-bacteria SUS.

Appearance and durability are almost same with ordinary SUS.

Anti-bacteria SUS has effect same as copper alloyed. (except for humidity pan)

6. Expandability (Module concept)

The control circuit is adopted commonly with MCO-20AIC.

7. Options

(1) Castor with adjustor (roller base: MCO-18RB)

(2) CO

2

gas tank switcher (assembled in unit: MCO-21GC)

(3) Extra stainless steel shelves (1 shelf + 1 shelf support basis :MCO-46ST)

(4) Stacking plate for double-piled (MCO-18PS)

(5) UV sterilization system (MCO-18UVS)

Note ; Model name

M CO – 18 A I C

C: Copper alloy anti-bacteria stainless steel

I: Infrared CO

2

sensor

A: Air jacket

18: Chamber capacity (170L)

CO: CO

2

Incubator

M: Medical equipment

1

Performance specification

Model MCO-18AIC

Temperature: 5

°C∼35°C

Ambient temperature and Humidity: Less than 80%RH humidity range

(In ambient temperature is lower than 15

°C, original performance cannot be always obtained)

Temperature control range in the unit

Ambient temperature+5

°C∼+50°C

(Settable range:0

°C∼50°C)

Temperature distribution in the unit

±0.25°C Ú

Temperature variation in the unit

±0.1°C Ú

Temperature recovery period

25 minutes or less

(until the internal temperature is recovered to 36.5

°C after door opened for 30 seconds)

CO

2 level range

0

∼20%

CO

2

level distribution range

±0.15%

CO

2

level recovery period

Internal humidity

10 minutes or less

(until the CO

2

level is recovered to 4.5% after door opened for 30 seconds.)

95

±5%RH

Internal humidity recovery

30 minutes or less period

(until the internal humidity is recovered to 90%RH after door opened for 30 seconds.)

Supplied CO

2 gas pressure 0.03MpaG (0.3kg/cm

2

G) when the gas supplied

Power supply Single phase, local voltage

Total power consumption

Total current

310W

110-120VAC: Maximum 2.8A

220-240VAC: Maximum 1.4A

Maximum 1120kJ/h Quantity of radiation

Test condition

:

Set point: 37

°C

CO

2 set point: 5.0%

No load

Ambient temperature: 20

°C

Ambient humidity: Approx.45%

Ú Based on the measuring method on validation service manual.

3

Control specification

Model MCO-18AIC

Heating method Direct Heat + Air jacket (DHA)

Temperature control system

Microprocessor PID

Sensor: temperature sensor (103AT-1)

Detect and control the inside temperature directly.

Temperature indication

Digital display (resolution: 0.1

°C)

CO

2 measuring system Infrared CO

2

sensor, PID control

CO

2 level indication

Humidifying system

Digital display (resolution: 0.1%)

Natural vaporization by water in humidify pan.

Humidify pan: W293 x D407 x H41mm

Inside air circulation

Alarm system

Door switch

Breeze circulation

High/low temperature alarm, high/low CO

2

level alarm

Both display for temperature and CO

2

are flashing, and buzzer sounds intermittently after 15 min.

Independent alarm for overheat

Door lamp

When outer door is opened:

Inside fan OFF, CO

2

valve OFF, (UV lamp * OFF) and heater OFF

(only when door is kept opening for 1 min. or more)

Remote alarm

When an alarm is triggered:

Remote alarm ON (Alarm and buzzer are interlocked.)

Contact output: rating of contact 30VDC, 2A

Self diagnosis function

UV lamp control *

Error code and internal temperature are displayed alternately.

Buzzer and remote alarm contact ON

Automatic ON-OFF control (changeable with Function mode)

1. Interlocked with the door:

UV lamp ON for 5 min. after every door closed.

2. OFF mode (UV lamp does not turn on)

* UV lamp is optionally provided.

4

Dimensions

5

6

Temperature calibration

Note) When key lock mode is ON, calibration mode is disabled.

(1) Press CAL key for approx. 5 seconds.

(2) The top (the 3 rd

) digit of temperature display is flashing, other digits will go off.

(3) Set the present correct temperature with key and key. Press

ENT key.

(4) The display will automatically revert to the present temperature.

[Example] If the internal temperature display shows 37.0

°C (the set value) and the actual measured value is 36.8, j

CAL key for approx. 5 seconds. l

Set the displayed value at 36.8

°C of the actual measured value with key and key, then press ENT key. m

(Note) sIn temperature calibration, it is important to accurately measure the internal temperature.

Particularly, for the thermometer used, its grade of accuracy should be than 0.5 class. The measure should be carried out at the center of the chamber. sThe temperature calibration range is between the set value ±1.0°C. If the value over this range is input, an error tone will be emitted, the input data will be ignored, and the display will revert to the present temperature. Therefore, if you need to calibrate more than 1.0

°C, you should repeat above procedure several times.

8

CO

2

Calibration

Note) When key lock mode is ON, calibration mode is disabled.

(1) Press CAL key for approx. 5 seconds.

(2) The top (the 3 rd

) digit of temperature display is flashing, other digits will go off.

(3) Press CAL key again.

(4) The top (the 3 rd

) digit of CO

2

density display is flashing, other digit will go off.

(5)

Set the present correct CO

2

density with key and key. Press

ENT key.

(6) The display will automatically revert to the present temperature.

[Example] If the internal CO

2

density display shows 5.0%(the set value), the actual measured value is 4.5, j

Press CAL key for approx. 5 seconds. m

The top digit of CO

2

density display is flashing, other digits will go off. n

Set the displayed value at 4.5% of the actual measured value with key and key, then press ENT key. o

The display will automatically revert to the present temperature.

(Note) s In CO

2

calibration, if CO

2

density display is less than 2.0%, an error tone will be emitted and the input data will be ignored, and the display will revert to the present temperature. s CO

2

calibration should be done after CO

2

density measuring was done at least three times after checked that there is no error of measurement. s This unit has auto zero adjustment function. It is necessary to check that the room installed the unit is not filled with CO

2

gas.

If the unit is installed in smaller room, be sure to change the room air timely.

(Please request to your customers.) s CO

2

calibration should be done in consideration of the difference for CO

2

density meter.

9

Control specification

1. Key and switch

BZ : When an alarm LED is flashing and the buzzer sounds,

Buzzer and remote alarm output Force to turn off

When an alarm lamp flashing and the buzzer does not sound, buzzer remains OFF.

SET : Press once to enter the device into setting mode.

Press twice to enter the device into CO

2

level setting mode.

Press third times to enter the device into over-heat protection temperature check mode. Press four times to return the device to internal temperature (PV) display.

: In the setting mode, the device can be shifted the 2 nd

digit the 1 st

1 st

decimal place.

digit the

:

In PV display, keep the key pressing 5 seconds or more to enter the key lock mode.

In the setting mode, the blinking digit counts up.

CAL :

Note)

In PV display, keep the key pressing approximately 5 seconds to enter the device into the calibration mode, press again to enter the device into the CO

2

calibration mode. When the CO

2

setting value (SV) is 0%, the device goes into PV display instead of the CO

2

calibration mode.

In the temperature calibration mode, input FXX with key and then press ENT key to enter the device into the function mode to obtain information of each mode.

During CO

2

Auto Zero adjustment (the decimal point of indicator is flashing), the CO

2

calibration will not be performed with beeping the buzzer for a second continuously even if ENT key is pressed.

ENT : During setting mode, CAL mode and Function mode, press the key to store the value. The function is not valid for the unchangeable values.

A / B : The key is available only in optionally Auto-changer mode in F08.

In Auto-changer mode, press the key to switch the cylinder in use to another one.

Lighting A or B indicates as the cylinder in current use. (If the Auto-changer mode is not installed, the cylinder switcher lamp does not activate)

When the cylinder in use is emptied, automatically switches to another one. At the time the lamp of cylinder emptied will blink, and the lamp of another one will illuminate.

(Ex: When the CO

2

cylinder in current used is emptied, the lamp cylinder A switches to blink, and then the lamp cylinder B will illuminate)

2. Temperature

Setting range :

Display range :

0

°C~+50°C

0

°C~+99.9°C

Setting method : Press the SET key. Change to the desired value with key and key,

Out of the range: then press the ENT key. The value will be stored and then the device shifts to CO

2

setting mode.

When a value is set out of the range and ENT key is pressed, buzzer sounds 1 second (continuously) and the previous value is still remained.

Control : PID control

Alarm : When the PV is SV

±1°C or higher, the display digit blinks.

After 15 minutes later, buzzer sounds and remote output turns ON.

10

3. CO

2

control

Setting range : 0%~20%

Display range : 0%~99.9%

Setting method : Press SET key twice.

Change to the desired value with key and key, then press ENT key to store the value. Then the device shifts to the Overheat protection

Out of the range: temperature check mode.

When a value is set out of the range and ENT key is pressed, buzzer sounds 1 second (continuously) and the previous value is still remained.

Control : PID Control

Control OFF : When a value is set in 0.0%, CO

2

Control OFF. display will be disappeared to be the

Alarm : When the internal CO

2

level deviates SV

±1% or higher, CO

2

display blinks. After the 15mininutes later, buzzer sounds and remote alarm terminal turns ON.

4. Overheat protection temperature check mode

Setting range : 35

°C~51°C

Setting method : Press SET key for three times to display the overheat protection temperature on PV display and “HI” on CO

2

display.

Press SET key again to return to PV display.

5. Alarm, safety mode and self diagnosis

In sensors malfunctions and CO

2

control malfunctions, an error code and PV is displayed alternately.

Note) The remote alarm is controlled in every a minute exceptionally in Auto Zero.

That’s why the remote alarm control is delayed 4minutes (max) after an error is displayed.

E01:

2

cylinder is empty

E05: Temp. sensor is open circuit

E06: Temp. sensor is short circuit

E07:

2

box temp. sensor is open circuit

E08:

2

box temp. sensor is short circuit

E09: Ambient temperature sensor is open circuit

E10: Ambient temperature sensor is short circuit

E11:

2

sensor output voltage is abnormal

E12: Main heater is abnormal

E13: Bottom heater is abnormal

E14: Door heater is abnormal

E15:

2

sensor box heater is abnormal

E16: SSR for each heater is open circuit

E17: Sample pump and/or Auto zero pump malfunction

E18: UV lamp malfunction (a lamp blown out, a glow lamp unfitted, etc)

The description of error codes are follow:

E01 : CO

2

cylinder is empty

When the CO

2

level is not 0.2% or more in a minute even though the valve is opened, “E01” and “Internal temperature “ are displayed alternately, and buzzer sounds intermittently.

The definite action that CO

2

cylinder is empty, repeats twice, therefore it takes approximately 2minutes to display an error after the cylinder would be emptied.

11

E05,E06 : Temp. sensor malfunction (open / short circuit)

When the micro-computer detects an internal temperature as 0

°C or lower, it is judged as “open circuit” displaying alternately “E05” with PV and sounding intermittent buzzer.

When the micro-computer detects an internal temperature as +60

°C or higher, it is judged as “short circuit” displaying alternately “E05” with PV and sounding intermittent buzzer.

Note)

In E05 and E06, displayed PV is different from product’s actual temperature)

CO

2

box temp. sensor malfunction (open / short circuit)

See E05, E06 in details.

(Note: In E07 and E08, CO

2

valve is closed)

E09, E10: Ambient temperature sensor malfunction (open / short circuit)

See E05, E06 in details.

E11 : CO

2

sensor output voltage is abnormal

When sensor box temperature is stable and high or low temperature alarm is not occurred, it is judged as CO

2

sensor malfunction if CO

2

output voltage is lower than 1000mV or higher than 4800mV. “E11” and “internal temperature” are displayed alternately, and buzzer sounds intermittently.

At the time, CO

2

valve is closed.

E12 : Main heater is abnormal

When high temperature alarm is activated, when the main heater is open circuit, and when the main heater SSR is short circuit, “E12” and an internal temperature are displayed alternately and buzzer sounds intermittently. An error is not displayed just after failed because the self-diagnosis for SSR and heater failure is done only in every 40min or in the power supplied.

(Above description is also applied for E13 - E16)

E13 : Bottom heater is abnormal

When the bottom heater is open circuit, or SSR is short circuit, “E13” and an internal temperature are displayed alternately, and buzzer sounds intermittently.

E14 : Door heater is abnormal

When the door heater is open circuit, or SSR is short circuit, “E14” and an internal temperature are displayed alternately, and buzzer sounds intermittently.

E15 : CO

2

sensor box heater is abnormal

When the CO

2

sensor box heater is open circuit, or SSR is short circuit, “E15” and internal temperature are displayed alternately, and buzzer sounds intermittently.

E16 : SSR is open circuit

When any SSR of main heater, bottom heater, door heater and CO

2

sensor box heater is open circuit, “E16” and an internal temperature are displayed alternately, and buzzer sounds intermittently.

E17 : Sample pump and Auto zero pump malfunction

In SV is 3.5% or higher and the current level is 3.5% or higher, if the difference of voltage between “during Auto Zero “ and “before Auto Zero” is 150mV or lower, it judges as “Sample pump and Auto zero pump malfunction”. “E17” and an internal temperature are displayed alternately and buzzer sounds intermittently.

At the same time CO

2

valve is closed.

The judgement would be done in every Auto Zero adjusts, however, the judgement in the 1 st

interval in Auto Zero would be ignored.

12

E18 : UV lamp malfunction (UV lamp is optionally provided)

When the time to turn the UV lamp on (F01) is set, the microcomputer checks the output voltage in UV detect circuit, that is detected 30seconds after the door was opened

→ shut. If the detected voltage is 0.2V or lower, it is judged as UV lamp malfunction. “E18” and “internal temperature “ are displayed alternately, at the time the buzzer sounds intermittently. Press BZ key to cancel the error.

High temperature alarm:

When the internal temperature is out of SV, OVERHEAT lamp illuminates displaying “PV” with “E12” (main heater malfunction) or “E16” (SSR for each heater is open circuit) alternately. The buzzer sounds intermittently. It is impossible to stop the buzzer sounding by BUZZER key.

At the time heaters (main heater, bottom heater and door heater) will be OFF. temperature

When the internal temperature is

±1.0°C out of SV, all digits in temperature display blink and intermittent buzzer sounds with 15minutes delay.

Automatic level alarm

When the internal CO

2 level is 1.0% out of SV, all digits in CO

2

display blink and intermittent buzzer sounds with 15 minutes delay.

CO

2

Auto Zero adjustment calibration:

See details in “Auto Zero adjustment”, Page 26.

6. Key lock function

Lock mode : In PV display, keep pressing key (shift key) over 5 seconds to enter key lock mode, display will change to “L0”.

Press key to set 1 ……… Key lock ON

Press key to set 0 ……… Key lock OFF

Note)

Display : When the door is opened, DOOR lamp illuminates.

When the door is closed, DOOR lamp goes off.

Safety operation :

When the door is opened, fan motor turns off, CO

2

valve shuts off,

(UV lamp turns off if it is optionally fitted).

If the door left opened for 60seconds, the heater turns off.

8. Auto

Function : In setting mode, Key Lock mode and Function mode, if any key is not operated for 90 seconds or more, the display automatically returns to PV without storing the value to be changed.

9. Calibration

Temperature calibration :

In PV display, press CAL key for approx. 5seconds to enter the device into temperature calibration mode.

Input a proper value with key and key then press ENT key to store the value. Finally the device returns to PV display.

Press SET to memorize the set, then automatically returns to PV display.

In Key Lock ON, the device can enter into SET mode to check SV, however, the value cannot be changed. The device also cannot enter into Function mode.

13

CO

2

calibration : In PV display, press CAL key for approx. 5seconds to enter the device into temperature calibration mode, then press CAL key again to enter the device into CO

2

calibration mode.

Input a proper value with key and key then press ENT key to recognize and store a span calibrated value. Finally the device returns to PV display. (a span adjustment)

If CO

2

level is lower than 0.9% or higher than 20% on the display, or if a value to calibrate is higher than 2.0%, the buzzer beeps to cancel the data input then automatically returns to PV display.

During Auto Zero adjustment (the decimal point of the 2 nd

digit is blinking on CO

2

display), CO

2

calibration cannot be performed.

10. Function

F01: Time length of UV lamp illuminating is changed. (initial: 000)

(UV lamp is optionally provided)

F02: UV lamp 24hours sterilization mode set

(UV lamp is optionally provided)

F03: Service code input (code: 384)

F04: UV lamp life span check (UV lamp is optionally provided)

F05: Display the voltage in CO

2

sensor

F06: Change the output ratio of bottom heater (initial:12)

F07: Change the output ratio of door heater (initial: 4)

F08: Auto changer, DEMO mode, Auto Zero mode set (initial : 000)

F09: Display a temperature in CO

2

sensor box

F10: Display a coefficient of adjustment value for CO

F11: Display a coefficient of adjustment value for CO

2

2

zero point

span point

F12: Display the temperature in ambient temperature sensor

F13: Initialize non volatile memory

F14: LEDs and drivers performance check

F15: Display a value to adjust zero point in temperature (initial: 008)

F21: Communication device address (ID) set (initial: 000)

F22: Communication parameter set (initial: 000)

F24: Interlock the remote alarm with buzzer (initial: 000)

F25: Ring Back time set (initial: 030)

F30: Display ROM version

Direction for use: In PV display, press CAL key for 5seconds or more to enter the device into temperature calibration mode. Input a desired function code with key and key then press ENT key.

F01: Time length of UV lamp illuminating is set. (initial: 0min, range:0~30min)

Note) UV lamp is optionally provided. for use> on the CO

2

display. Input the desired value with key and key then press

ENT key to store the value. Finally returns to PV.

If a value out of the range is input then ENT key is pressed, the buzzer beeps for a second continuously to keep the previous set.

<Action> After the door is opened and shut, UV lamp illuminates in appointed time then automatically goes off. There is approx. 3~5seconds delay to active the mode, due the device would check water level in the humidify pan just after the door shut. With UV lamp illuminating, the lamp goes off if the door is opened.

14

F02: UV lamp 24hours sterilization mode set for use>

Note) UV lamp is optionally provided.

Input “F02” on temperature display to show “000” on CO

2

display.

Input “001” with key and key to enter the device into 24hours sterilization mode.

At the time press ENT key displaying with “001” to simply return to PV display.

<Action> When 24hours sterilization mode is set in F02, UV lamp starts illuminating and automatically goes off after 24hours has passed. In the middle of 24hours sterilization, if the door is opened, UV lamp goes off and 24 hours sterilization mode would be cancelled.

Note) UV indicator lamp should illuminate when UV lamp illuminates, so the indicator lamp illuminates if UV lamp is unfit.

If 24hours sterilization mode is reset in the middle in F02, the mode would start operation from the beginning.

F03: Note that those who knows service code (384) should use F04 or the following functions (except for F21, 22, 24, 25 and 30). for use> Input “F03” on temperature display then press ENT key to show “000” on CO

2 display. (“384” is appeared if service code has been already input)

Input service code “384” with key and key, and press ENT key to return to

PV display. Now F04 and the following functions are available.

If F03 or a following function code instead of the above code is input in F03, for example if “F05” is input then ENT key is pressed, the continuous buzzer beeps for a second to return to PV display. In this case input the above code to enter the device into “F04” or a following function.

Note) The above code is stored unless “000” is input in F03 or the mains is OFF.

F04: Display life span of UV lamp

Note) UV lamp is optionally provided. for use> time (a period to turn UV lamp on) by unit of %.

<Description> The microcomputer calculates UV lamp whole life span as 1000hours.

A period to turn UV lamp on is displayed in the unit of %.

For example, the period less than 5minutes is considered as 5minutes, the period of 6~30minutes is simply counted as they are.

In 24hours mode, simply 24hours is added just after “001” is input and ENT key is pressed in F02, ignored with the cancel for 24hours mode caused by the door is opened in the middle.

The added value is stored in the non-volatile memory in every 24hours.

Display the added value in F04 then display “000” on CO

2

display with key and key and press ENT key to clear the value.

The display range is 0~260%. A value over than 260% is not added.

If the added period is over than 1000hours, UV indicator on the control panel flashes to inform “UV lamp run down”. The “run down” is provided by the microcomputer’s calculation, it does not mean “the actual time to be UV lamp run down”.

UV lamp life span

1000hours or less

1000hours or more

UV indicator on the control panel

UV lamp ON UV lamp OFF

Illuminates

Illuminates

Goes off

Flashes

15

F05: Display the voltage in CO

2

sensor (A/D converter voltage in microcomputer on the main PCB) for use> CO

2

sensor on CO

2

display. Press ENT key to be Auto Zero forcibly performed within a minute. Since the 90seconds Auto Return is invalid in this mode, press

ENT key to come to the end.

F06: Adjust humidity level by changing the electricity output ratio in the bottom heater.

(initial: 12, the range: 0~19) for use> CO

2

display.

Sum the value up to make humidify higher. Lessen the value to make humidify lower.

Press ENT key to store the value and automatically returns to PV display.

F07: Prevent dew condensation by changing the electricity output ratio in the door heater. (initial: 4, the range: 0~9) for use> CO

2

display. If there is dew condensation on the door, sum the value on CO

2 display up and press ENT key to store the value and automatically returns to PV.

F08: Auto Zero and Auto Changer ON/OFF set, Demonstration mode set

(initial: 000)

In

2

cylinders are available when CO

2

is requested to supply. A lamp of cylinder in current used (either lamp-A or lamp-B) is illuminated to switch manually one to another with A/B key.

If the cylinder in current used is empty, automatically switches to another cylinder and the lamp of empty cylinder flashes.

In

2

are displayed, it seems to be under control. At the time the heater is not conducted and CO

2

valve is not opened. (Demonstration mode is used in exhibitions.)

Auto Zero, zero adjustment for CO

2

sensor is automatically performed based in ambient air. Auto Zero is performed per every 10minutes in 1 hour when the main power is supplied, after that it is performed per every 4hours.

<Direction rd

digit on CO

2

display) use> Input “F08” on temperature display and press ENT key to show a current SV in the 3 rd

digit on CO

2

display. The value “0” is the normal mode (Auto

Changer is inoperative), the value “1” is Auto Changer is operative.

Demonstration mode setting (in the 2 nd

digit on CO

2

display)

Input “F08” on temperature display and press ENT key to show a current SV in the 2 nd

digit on CO

2

display. The value “0” is the normal mode (Auto Zero is operative), the value “1” is Demonstration mode is operative.

Change the 2 nd

digit to a desired digit and press ENT key to return to PV display.

Auto Zero setting (in the 1 st

digit on CO

2

display)

Input “F08” on temperature display and press ENT key to show a current SV in the 1 st

digit on CO

2

display. The value “0” is the normal mode (Auto Zero is operative), the value “1” is Auto Zero is inoperative.

Change the 1 st

digit to a desired digit and press ENT key to return to PV display.

16

F09: Display the temperature in CO

2

sensor box use> temperature in CO

2

sensor box. If you press ENT key or leave for 90seconds, automatically returns to PV display.

In SV is +45

°C, CO

2

valve turns OFF when the temperature is out of

SV

±2.0°C.

Once the temperature retrieves in SV

±2.0°C, Auto Zero is forcibly executed since the apparatus falls into the condition that the main power is supplied.

When CO

2

is not injected, the temperature in sensor box may be out of

±2.0°C, or it may be within 60minutes after the main power is supplied, or

Auto Zero may be being executed.

F10: Display a coefficient of adjustment value for CO

2

zero point (initial: 500) use> of adjustment value for CO

2

zero point on CO

2

display. If you press ENT key or leave the device for 90seconds, automatically returns to PV display.

<Description> The condition is that CO

2

sensor voltage should be adjusted in 4.0V when internal CO

2

level is 0%. Perform Auto Zero and ensure the sensor output voltage should be approx. 4.0V when ambient air is got properly by the pump.

At that time the value should be approx. “500”.

If CO

2

in the ambient air is several %, the value would be lower than “500” since CO

2

sensor output voltage is lower than 4.0V.

(CO

2

Note)

sensor output voltage during Auto Zero pump performs / 4.0V) x 5000

Only bigger three digits are displayed. e.g “5000”

→ displayed as “500”

F11: Display a coefficient of adjustment value for CO

2

span point (initial: 500) use> adjustment value for CO

2

zero point on CO

2

display. If you press ENT key or leave the device for 90seconds, automatically returns to PV display.

<Description> The value is adjusted when CO

2

is calibrated. For example, calibrate CO

2

with

SV 4.5% when the CO

2

level is displayed as 5.0%, however the actual level is

4.5%. At that time the value in F11 should be lower than “500”, ex “460”. If the value is abnormal, ex “999”, the actual internal level can be 1.0%, however the CO

2

is displayed as 5.0%.

F12: Display a temperature in ambient temperature sensor use> temperature of ambient temperature sensor on CO

2

display. If you press ENT key or leave the device for 90seconds, automatically returns to PV display.

Note) This temperature is not synchronized with actual ambient temperature since it is affected by waste heat in electrical parts. (indicated approx. 4

°C higher than the actual temperature)

F13: Initialize the non-volatile memory (initial: 000)

This function should be used only when data in the non-volatile memory cannot be restored owing to unexpected events (ex: noise).

Do not use in normal condition. use> CO

2

display, then change the 1 st

digit to “1” and press ENT key to initialize all the data in non-volatile memory.

17

Followings are initial values in non-volatile memory:

Internal temperature SV

: 37.0

°C

CO

2

level SV : 0.0%

Balance value of humidifying heater (F06) : 12

Balance value of door heater (F07)

CO

2

zero adjustment data (F10)

CO

2

span data (F11)

: 5000

: 5000

Internal temperature zero adjustment data (F15) : 008

Key Lock data

Auto Changer data (the 3

Demo Mode data (the 2 nd rd

digit in F08)

digit in F08)

Auto Zero (the 1 st

digit in F08)

: 4

: Key Lock OFF

: Auto Changer OFF

: Demo Mode OFF

: Auto Zero ON

Input “F13” on temperature display and press ENT key to display “000” on

CO

2

display, then change the 1 st

digit to “2” and press ENT key to initialize

CO

2

zero adjustment data and CO

2

span data in non-volatile memory.

Note) Service code should not be initialized.

F14: Check the performance for LED, drivers use> and the all digits flashing at every 0.5seconds intervals. Press ENT key to stop performance.

If there is no key operation for approx. 90seconds, automatically comes to end

F15:

°C) use> adjustment value on CO

2

display for temperature zero point. If you press ENT key or leave the device for 90seconds, automatically returns to PV display.

(Ex.) In “37.0” is displayed on the control panel and actual temperature is “37.8”, if you perform temperature calibration (actual temperature “37.8” is input),

“+0.8” would be housed in F15. In Function Mode, input F15 and press ENT key to display the value on CO

2

display.

F21: Set serial communication ID (initial: 000) use>

Input “F21” on temperature display and press ENT key to show “000” on CO

2 display. Then input the value that identifies the product (serial communication

ID Number) and press ENT key to set serial communication ID. The range is

000~255. (000: communication OFF)

F22: Set serial communication mode (initial: 000) use>

Input “F22” on temperature display and press ENT key to show “000” on CO

2 display. Then change the 3 rd

digit to set the communication mode.

Control mode (the 3 rd

digit) 0: Local (initial)

1: Remote

Baud rate (the 2 nd

digit) 0: 2400bps

1: 4800bps

2: 9600bps

F24: Interlock the remote alarm with buzzer (initial: 000) use> CO

2

display. Then change the 1 st

digit to “000” to set the interlock mode.

000: Buzzer/Remote alarm not interlocked

001: Buzzer/Remote alarm interlocked

18

F25: Ring Back time set (initial: 030 (30min), the range: 0~60min) use>

Input “F25” on temperature display and press ENT key to set current Ring

Back delay time. Change the 2 nd

digit to set delay time in the range of

0~60min.

Note) Ring Back time set, F25 = “000” means BZ would not comeback (in former spec)

F30: Display the ROM version use> version on CO

2

display.

11. Bottom heater control

In order to shorten the recovery time of humidity, conduct electricity to humidity heater as follows.

• In the ordinary, the maximum electricity conduct to bottom heater should be in the ratio of

80%.

• When the internal temperature is SV-0.4~-0.6deg, conduct 80% electricity to humidify

heater for 10minutes (max). SV in F06 is applied except for above temperature.

• 80% electricity conduct should not be performed in the following cases:

1) The period until an internal temperature reaches to SV-0.2deg after the power is supplied

2) The period until an internal temperature reaches to SV-0.2deg after the door is left opened continuously for 60seconds or more.

12. Door heater control

Ordinarily, conduct electricity to door heater in the same ratio with main heater. SV in F07 is applied.

13. Remote alarm: remote alarm contact

In normal condition ……... Open

In alarming condition …… Close

Note) The recovery time after BZ key is pressed and linkage between remote alarm and buzzer are depending on F24, F25 setting.

14. Storing in non-volatile memory

2 times comparison method: When the main power is supplied, a data storing in non-volatile memory is called for 2 times to compare. If the data 1 st

called coincides with the data of 2 nd called, the data would be stored in RAM. Otherwise, the comparison would be repeated until the one coincides with another.

15. Temperature offset value

The difference between temperature sensed in temperature control sensor and temperature in internal 1/2H should be offset:

Offset value: +0.8

°C

16. Example for displays

Current temperature +36.2

°C CO

2

level +5.0%

Set temperature +37.0

°C Auto Zero adjusting

Function F03 Auto Zero adjustment value 5021

(Service code input) CO

2

gas error E01

Bottom heater ratio 004

Lock Mode L 0

19

Wiring Diagram

20

Circuit Diagram

21

Components on PCB

22

Connection on PCB

The following shows connections of connector (CN) on main PCB.

CN1

CN2

Power transformer

Between #1

−#2, AC8.5V

#3 GND

#4 and #5, AC18V

Power supply

Between #1

−#2(GND), DC5V

CN3 CO

2

sensor

CN4

CN6

#1

−#2

#3

−#4

#5

−#6

Door switch

Overheat protect sensor

Temperature sensor

CO

2

box temp. sensor

Use

To supply the power to PCB.

To supply the power AC36V for Auto zero air pump.

To supply the power to PCB.

Input from CO

2

sensor.

To measure the temperature of each parts.

To detect the door opening.

CN8

CN9

CN10

Switch, display PCB (CN101)

#1

−#2 CO

2 valve

#3

−#4 CO

2 auto changer valve (option)

Remote alarm output

#1

−#2 Open during normal operation

CN11 Communication board (option)

CN12

#1

−#2 Auto zero air pump

#3

−#4 Air pump

hinge sub heater

CN13 Buzzer

CN14 UV lamp relay (option)

To control CO

2 valve ON and OFF.

Output of remote alarm contact

CN15 Water sensor To check water level in humidify pan.

CN101 Display PCB (CN8)

The following shows connections of connector (CN) on power PCB.

Use

CN302

C303

#1: Heater for heat control (5pcs)

#3: Bottom heater (4pcs)

#5: Front panel heater, Door heater (2pcs)

#1: CO

2

A, B heater

#3: Agitating fan motor

To control heater

To control the sensor BOX temperature.

To control the pump for circulation.

23

CO

2

gas circuit

Auto Zero air pump

25mm

Cap. tube

Filter

Air pump

CO

2 sensor

T -connector

Filter

25mm

Cap. tube

Solenoid valve

Filter

Gas supplied

Sample port

(front)

< Back view >

24

Prevention of contamination

In servicing for CO

2

incubator, it is important to prevent from contamination.

(1)More than 90% of contamination in CO

2

incubator is caused by mold. Mold is a kind of true fungi, it has high increasing power under high temperature and high humidity.

Accordingly, it is easy for mold to increase inside CO

2

incubator. Those increased mold eat up culture (mainly animal cell), eventually precious test sample will be killed. Cell that is independent from ecosystem is also independent from immune system, it has no immunocompetence at all.

(2)Precautions for mold increasing

There are many cases that mold is increasing by eating fat on the fingers as a source of nutrient in CO

2

incubator.

Therefore, c

Be sure to wash and sterilize your hands prior to servicing. Use 70% ethanol. d

In installing, sterilize the inside wall and shelves after removing shelves, duct, humidifying pan and so on with 70% ethanol.

(3)In the case that mold is already increasing.

Sterilize the interior (walls) and shelves with 70% ethanol after removed all items from the chamber as same as (2)d

above.

And you should sterilize again after 24 hours once sterilized, when the root of spore is geminated, because it is too difficult to remove spore of mold. Repeat sterilization is effective.

NOTICE

In general, stainless steel is known that it is not easy (hard) to rust.

However depends on the conditions, rust might generate.

When you remove rust, we recommend the following agents.

Besides, the surface may become foggy.

Recommended agent:

1

. Cream cleanser

ª Gif ¼ (Nippon Leva)

2

. Picasso #SUS300-W (Chemical YAMAMOTO)

<

Picasso has greater capability of clean for rust than Gif.

>

25

CO

2

gas density calibration and Auto Zero adjustment

MCO-18AIC provides both the manual CO

2

gas density calibration and the automatic Auto

Zero adjustment.

1. CO

2

gas density calibration

When either the CO

2

density SV or the display value is not match with the actual value, calibrate CO

2

gas density according with “CO

2

calibration” (Page 9) to input the actual value again.

2. Auto Zero adjustment

Refer to “Auto Zero adjustment”

3. The relation the CO

2

gas density calibration with the Auto Zero adjustment

The description is as follow.

(Ex: CO

2

density = 5%

)

5

Ideal line for the set value and the actual value.

(Note) In fact, it could not make a straight line due to the characteristics of the sensor.

Point calibrated by CO

2

gas density calibration

0

0

5

Set density(%CO

2

)

Point calibrated by auto zero adjustment

27

Specifications of sensor

„

Temperature/Resistance for temperature sensor 103AT-1

The measure of internal temperature (internal temperature, overheat protection) and ambient temperature

Temperature

(

°C)

Resistance

(k

Ω)

Temperature

(

°C)

Resistance

(k

Ω)

Temperature

(

°C)

Resistance

(k

Ω)

0 27.28 17 13.57 34 7.19

1 26.13 18 13.06 35 6.94

2

3

4

5

6

7

8

25.03

23.99

22.99

22.05

21.15

20.29

19.48

19

20

21

22

23

24

25

12.56

12.09

11.63

11.20

10.78

10.38

10.00

36

37

38

39

40

41

42

6.70

6.47

6.25

6.03

5.83

5.63

5.44

9

10

11

12

13

14

18.70

17.96

17.24

16.55

15.90

15.28

26

27

28

29

30

31

9.63

9.28

8.94

8.62

8.31

8.02

43

44

45

46

47

48

5.26

5.08

4.91

4.75

4.59

4.44

15

16

CO

2

density

(%)

14.68

14.12

R13 output voltage(V)

32

33

CO

2

density

(%)

7.73

7.46

„

Specification for CO

2

density/output voltage in IR sensor

(Output voltage = amplify value in main PCB)

R13 output voltage(V)

49

50

4.30

4.16

Followings are reference voltage.

In actual use, it is no problem if the calibration could be done in reliable

CO

2

density.

CO

2

density

(%)

R13 output voltage(V)

0.0 4.00 8.0 2.87 16.0 2.47

1.0 3.74 9.0 2.80 17.0 2.43

2.0 3.54 10.0 2.75 18.0 2.40

3.0 3.37 11.0 2.69 19.0 2.37

4.0 3.23 12.0 2.64 20.0 2.33

5.0 3.12 13.0 2.59

6.0 3.02 14.0 2.55

7.0 2.94 15.0 2.51

28

Parts layout

Remote alarm terminal agitating fan motor monitoring hole

Auto Zero air pump

29

CO

2

valve filter

CO

2

gas inlet

remote alarm terminal sensor BOX transformer for PCB noise filter sensor BOX temp. sensor thermal fuse sensor BOX heater

CO

2

IR sensor power comsumption resistance (R13)

30

CO

2 gas inject port

Overheat protect sensor

Temp. sensor

Inlet port of Sampling gas for CO

2

sensor

Return port of Sampling gas for CO

2

sensor

UV lamp connection port

Water level sensor

31

MCO-18UVS Installation Procedure

Kit of MCO-18UVS

g 1 UV label h

1 UV caution label c

1 UV lamp i

1 UV door switch caution label q

1 Name plate d

1 UV lamp cover f

1 ballast & glow assy

Procedure

e

6 screws

(M 4)

1. Unplug the unit and make sure that power is not supplied to the unit.

2. Remove the duct from inside the unit, then take off 2 caps and 2 screws shown in Fig. 1.

r

1 Patent label

4. Take out two insulations for the UV lamp lead wire hole shown in Fig. 3.

The insulation can be taken out easily by pushing it from inside of the chamber. Keep the insulation for the future use again.

Screw

Cap

Fig.1

3. Take off the rear cover shown in Fig. 2.

Insulation

Fig.3

5. Set the UV lamp to the hole and make sure to be fitted properly.

Fix the UV lamp cover with 2 screws enclosed in this kit.

Rear cover

Fig.2

32 e

Screw c

UV lamp d

UV lamp cover

Fig.4

6. Replace the duct. Place the humidifying tray, then cover the tray with the humidifying tray cover as shown in Fig. 5

8. Remove a cap shown in Fig. 7.

By using 4 screws enclosed with this kit, fix the ballast/glow assy as shown in Fig. 7.

Humidifying tray cover

Fig.5

7. Replace the insulation into the UV lamp lead wire hole with the wire passed through the cut on the insulation. See Fig.6

e

Screw f ballast & glow assy

Fig.7

Cap

UV lamp lead wire

Insulation

Fig.6

33

9. Connect each lead wire connector of ballast/glow assy, as shown in Fig. 8.

10. Attach the labels.

Fig.8

Connect after removing the cover.

BLUE

Cover

GREEN i UV door switch caution label j Name plate g UV label

Fig.9 h

UV caution label k

Patent label

34

11. Set the UV lamp ON period through control panel

When using UV lamp option, it is needed to set the UV lamp ON period. Refer to the following procedure.

Description of operation Key operated

Indication after operation

1 Turn the power switch ON.

2 Press CAL key for 5 seconds.

-

CAL

The current chamber temperature is displayed.

The left digit in the temperature indicator is flashed.

3 By pressing key and

key, set the figure to F01.

4 Press ENT key.

ENT

In CO

2 density indicator,

"000" is displayed and the right digit is flashed.

F 0 1

F 0 1 0 0 0

5 By pressing key and

key, set the figure to 005 (5 minutes of ON period).

6 Press ENT key.

ENT

F 0 1

The setting of UV lamp ON time is memorized and the current chamber temperature is displayed.

0 0 5

<<NOTE>>

• The UV lamp ON time is settable between 0 to 30 minutes. However, it is recommended to set 5 minutes in general.

• The UV lamp ON time is settable between 0 to 30 minutes (000 to 030). The UV lamp is not turned ON if the setting is 000.

• The UV lamp is turned off when the outer door is opened while the lamp is on. The lamp is turned on for pre-set duration after the outer door is closed.

• The condensation in the chamber can be caused and/or the chamber temperature distribution can be affected due to the heat from UV lamp when the setting of UV lamp ON time is longer than 5 minutes or the only the outer door is opened/closed repeatedly. In such case, the life of UV lamp is shortened.

• In the procedure 2 above, pressing CAL key for 5 seconds causes the calibration mode. In this mode, it is possible to calibrate the temperature and CO

2

density, and miss operation of the key may affect the basic performance of the unit. Take care of the key operation. Even if the key is operated wrongly, the unit returns to the current value display mode automatically when no key is operated for 90 seconds. In this case, the setting not entered by pressing ENT key is not effective.

12. Check that the UV lamp is turned on.

Check the UV lamp is turned on by the following procedure:

Procedure

1 Open the outer door and push the door switch with the inner door is closed.

2 Check that the UV indicator on the control panel is on after a few seconds.

3 Check the visible blue light from the front side of the humidifying pan cover.

(Check the light with the inner door closed. Never look at the UV light directly.)

7FB6P104035003

35

Mounting Procedure of MCO-21GC

(

Automatic CO

Parts list

2

cylinder changer for MCO-20AIC/18AIC) c

CO

2

valve assy e connecting port for

CO

2

gas pipe f nut i

tube band (S) j

screw g spring washer k tube d

y-pipe assy h tube band (L) l tube L100

(Used for

MCO-18AIC ONLY)

Before mounting

This kit is applicable to both MCO-20AIC and MCO-18AIC.

Following procedure is necessary only when mounting to MCO-18AIC.

1. Remove the tube band on the CO

2

valve assy c

, and then remove the hose and capillary.

2. Attach the tube L100 l

and fix the tube by the tube band removed in procedure 1.

Make sure the tube band is fixed firmly to prevent gas leakage. c CO

2

valve assy tube band l tube L100

Remove the tube and capillary

Fig.1

36

Fix the edge by the tube band

Mounting procedure

1.Disconnect the power cable and make sure that the unit is not supplied with the power.

2.Remove the rear cover by unscrewing the 6 fixing screws.

3.Fix c

by using the enclosed screws( j

).

4.Remove cap and fix e

with f

and g

.

5.Connect the wiring harness of CO

2

valve B to wiring harness from CN9 on Main board.

6.Disconnect upper tube of CO

2

valve A.

Connect CO

2

valve A and CO

2

valve B and tube X by using d as shown in Fig.4.

7.Connect bottom tube of c

to e

.

8.Connect e

with CO

2

gas supply line B by using k

.

9 .Fix tubes securely using h

and i

as shown in Fig.4.

10.Replace the rear cover. Rear cover

NOTE: Every tubes should be connected surely to prevent CO

2

leakage.

Fig.2

Tube X

CO

2 valve B

CO

2

valve A white

Main board

CN9

CO

2 gas supply line A cap yellow

CO

2 gas supply line B

Fig.3

Fig.4

37

Setting procedure of Control panel.

When use MCO-21GC(the automatic CO

2

cylinder changer system),

it is necessary to set the

MCO-20AIC/18AIC automatic gas switching mode according to the following procedures.

Indication after operation

1 Turn the power switch ON. operated

-

2 Press CAL key for 5 seconds.

3 By pressing key and key, set the figure to F03.

4 Press ENT key.

5 By pressing key and key, set the figure to 384

CAL

ENT

The current chamber temperature is displayed.

The left digit in the temperature indicator is flashed.

F 0 3

In CO

2

density indicator,

"000" is displayed and the

F 0 3 0 0 0 right digit is flashed.

F 0 3 3 8 4

6 Press ENT key.

ENT

7 Press CAL key for 5 seconds.

8 By pressing key and key, set the figure to F08

9 Press ENT key.

10 By pressing key and key, set only the left digit figure to 1.

NOTE:Don't change center digit figure and right digit figure.

11 Press ENT key.

CAL

ENT

ENT

The current chamber temperature is displayed.

The left digit in the temperature indicator is flashed.

F 0 8

In CO

2

density indicator,

"0**" is displayed and the

F 0 8 0 * * right digit is flashed.

F 0 8 1 * *

"

*

" means "0" or "1".

Setting of MCO-21GC is finished.

The current chamber temperature is displayed.

CO

2

gas supply line indicator A is lighted.

38

Procedure for automatic gas switching operation check.

When the installation of MCO-21GC is completed, check the automatic gas switching operation according to the following to the following procedures.

procedure

1 Stop the gas supply of cylinder A and use cylinder B only for CO

2

gas supply.

2 Turn on the power switch of MCO-20AIC/18AIC and set 37decC and 0%.

Turn on CO

2

gas supply line indicator with CO

2

gas supply line switching key.

3 Wait for 1 hour approx , until the machine can control the CO

2

density.

(It takes about 1 hour from turning on the power switch until CO

2

control is enabled.)

4 Set

2

density 5% and check the CO

2

inject lamp turns on.

NOTE: In case of low ambient temperature, it may take more than 1 hour until the machine can control CO

2

density and the CO

2

inject lamp turns on.

5 Check the E01(CO

2

gas cylinder empty alarm) and buzzer turn on about

2-7minutes later from the CO

2

inject lamp's turning on.

6 Check the CO

2

gas density indicator reaches to the set value 5% and keep it stably.

NOTE: CO

2

density control is interrupted when automatic calibration of CO

2

sensor is activated and the decimal point of CO

2

density indicator blinks.

7 All the procedure are completed.

Shut down the CO

2

supply of cylinder A and cylinder B.

Turn off "E01" display with the buzzer key and select cylinder A with CO

2

gas supply line switching key.

Turn off the main power switch.

Refer to the MCO-20AIC/18AIC instruction manual for usage of MCO-21GC

39

7FB6P104036000

HOW TO REPLACE WATER LEVEL SENSOR.

1.Unplug the unit and check that power is not supplied to the unit, then take the rear cover off.

2.Unfasten the connectors for lead wire and take out the insulation for the lead wire hole.

Water level sensor lead wire connector

Insulation for the lead wire hole

3.Take out the duct from inside.

4.Unfasten the 2 screws to remove unit of water level sensor and installation grommets for water level sensor.

5.replace water level sensor.

Note Be sure to set the water level sensor to the right direction.

6.Place back the water level sensor, Water sensor installation grommet as before.

7.Place back the insulation material to the hole for the lead wire.

Note Be careful for the length of lead wire for water level sensor inside the unit Length is connect 2 nd

binder is located where it touches the water level sensor grommet.

(refer to Fig.3)

3.Put the rear cover in place screw

Fig.1

Water level sensor

Installation grommet

Water level sensor

Fig.2

Water level

Sensor grommet

Fig.3 binder

40

MCO-18PS Installation Procedure

Kit of MCO-18PS

c

2 Stacking plate B d

2 Stacking plate A e

4 Protective sticker

Procedure

<

When stacking 2 units of MCO-18AIC

>

1. Turn off the power switch and disconnect a plug of each unit. f

4 Screws

2. Check that the lower unit is level.

3. Apply the protective sticker enclosed in this kit at each corner on the top of the lower unit to avoid scratches or damage.

4. Fix the stacking plate A at 2 locations on the top front of the lower unit by using 2 screws enclosed in this kit.

5. Remove the front panel on the upper unit by unscrewing the 4 fixing screws and then disconnect the wires and gas tube.

6. Stack the unit so that both units can be aligned straight. Also check the upper unit is level. If it is not level, keep the unit even by adjusting the leveling legs.

7. Secure the upper unit with the stacking plate A and 2 screws enclosed in this kit.

8. Remove 2 hooks on the rear side of the lower unit by unscrewing each 2 fixing screws.

9. Remove 1 screw on the bottom right and left on the rear side of the upper unit.

10. Fix the stacking plate B at the right and left on the rear of the lower and upper unit with 3 screws removed in step 8 and 9.

11. Replace the front panel on the upper unit after connecting the wires and gas tube.

12. Fix the stacked unit to the wall with 2 hooks on the rear of the upper unit and rope or chain.

Front panel

Stacking plate B

Hook

Stacking plate A

Protective sticker

Fig.1

41

<

When stacking of combination as shown in Fig.2.

>

MCO-17AIC

MCO-17AC

MCO-15AC

MCO-18AIC

MCO-18AIC

MCO-17AIC

MCO-17AC

MCO-15AC

Fig.2

1. Turn off the power switch and disconnect a plug of each unit.

MCO-17AIC

MCO-17AC

MCO-15AC

MCO-17AIC

MCO-17AC

MCO-15AC

2. Check that the lower unit is level.

3. Apply the protective sticker enclosed in this kit at each corner on the top of the lower unit to avoid scratches or damage.

4. Stack the unit so that both units can be aligned straight. Also check the upper unit is level. If it is not level, keep the unit even by adjusting the leveling legs.

5. Remove 2 hooks on the rear side of the lower unit by unscrewing each 2 fixing screws.

6. Remove 1 screw on the bottom right and left on the rear side of the upper unit.(only MCO-18AIC)

7. Fix the stacking plate B at the right and left on the rear of the lower and upper unit with 3 screws removed in step 5 and enclosed in this kit.

8. Fix the stacked unit to the wall with 2 hooks on the rear of the upper unit and rope or chain.

Protective sticker

Fig.3

Ú

Stacking plate A is not used.

Stacking plate B

Hook

WARNING

Select a level and sturdy floor having enough strength for installation of stacked module.

Never stack 3 or more units.

Take care not to drop or tip over the unit when stacking as this can cause injury or damage of the unit.

7FB6P104038000

42

MCO-18SB Setting Procedure

(Stacking base for stacking MCO-18AIC/17AIC/17AC/15AC on MCO-175/175M)

1.Remove four clips on the top of lower unit.

2.Fasten four “ i

Fixing screws A” tentatively from where the clips were remove.

3.Set the “ c

Stacking base” and fix with screws tentatively fastened.

4.Stick the “ h

Protective sticker” on the “ c

Stacking base” as shown in Fig.1.

5.In case of stack MCO-18AIC

Put the upper unit on it. Fix the upper unit with “ d

Front fixing plate”, “ g

Rear fixing plate ”.

( e

Rear fixing plate R and f

Rear fixing plate L are not used.)

In case of stack MCO-17AIC/17AC/15AC

Put the upper unit on it. Fix the upper unit with “ d

Front fixing plate”, “ e

Rear fixing plate R”, and

“ f

Rear fixing plate L”. ( g

Rear fixing plate is not used.)

6.Check the both units are level. i j

NO.

c

Stacking base d

Front fixing plate

Parts name e Rear fixing plate R (for 17AIC/17AC/15AC) f

Rear fixing plate L (for 17AIC/17AC/15AC) g

Rear fixing plate (for 18AIC) h Protective sticker i Fixing screw A j

Fixing screw B

1

2

2

4

Q’ty

1

2

1

8 h c

( f) g i

( e) j i j d

Fig.1

43

Fig.2

7FB 6 P104 041 00 0

MCO-21SB Setting Procedure

(Stacking base for stacking MCO-18AIC/17AIC/17AC/15AC on MCO-20AIC)

1. Stick the “ j

Buffer rubber” at each corner on the bottom of “ c

Stacking base”.

Stick the “ i

Protective sticker” on the “ c

Stacking base” as shown in Fig.1. d

Base mounting plate” onto the top of MCO-20AIC by using “ l

Fixing screw B”.

3. Remove 2 hooks on the rear side of MCO-20AIC.

4. Fix the “ c

Stacking base” onto the top of MCO-20AIC by using “ k

Fixing screw A” and 2 screws removed in step 3.

5. In case of stack MCO-18AIC

Put the upper unit on it. Fix the upper unit with “ e

Front fixing plate”, “ h

Rear fixing plate ”.

( f

Rear fixing plate R and g

Rear fixing plate L are not used.)

In case of stack MCO-17AIC/17AC/15AC

Put the upper unit on it. Fix the upper unit with “ e

Front fixing plate”, “ f

Rear fixing plate R”, and

“ g

Rear fixing plate L”. ( h

Rear fixing plate is not used.)

6. Check the both units are level. j c k l i

No.

c

Stacking base

Parts name Q’ty

1 d Base mounting plate 1 e Front fixing plate 2 f

Rear fixing plate R (for 17AIC/17AC/15AC) 1 g Rear fixing plate L (for 17AIC/17AC/15AC) 1 h Rear fixing plate (for 18AIC) i

Protective sticker

2

2

4 j Buffer rubber k Fixing screw A l

Fixing screw B

2

10

Fig.1 j

( g) k h c

( f) d l l hook l e

Fig.2

44

Fig.3

7FB 6 P104 040 00 0