Service Manual


Table of Contents

Summary of Contents for Sanyo MCO-18AIC

  • Page 1 FILE No. Service Manual Incubator MCO-18AIC SM9910023...
  • Page 2: Table Of Contents

    Contents Page Features ..........................1 Structural specification ......................2 Performance specification ..................... 3 Control specification ......................4 Dimensions........................5∼6 Electrical parts........................7 Temperature calibration ......................8 calibration ........................9 Control specification ...................... 10∼19 Wiring diagram ........................20 Circuit diagram ........................21 Components on PCB......................
  • Page 3 Effective models This service manual is effective following models. Model name Model code Voltage and Frequency MCO-18AIC 823 279 51 115V 60Hz 823 279 52 220V 50Hz 823 279 53 220V 60Hz 823 279 54 230V 50Hz 823 279 56...
  • Page 4: Features

    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 sensor installed. Infrared CO sensor is not affected by humidity. 3.
  • Page 6: Performance Specification

    Performance specification Model MCO-18AIC Temperature: 5 C 35 C Ambient temperature 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 Ambient temperature+5 C +50 C...
  • Page 7: Control Specification

    Control specification Model MCO-18AIC Heating method Direct Heat + Air jacket (DHA) Microprocessor PID Temperature control Sensor: temperature sensor (103AT-1) system Detect and control the inside temperature directly. Temperature indication Digital display (resolution: 0.1 C) measuring system Infrared CO sensor, PID control level indication Digital display (resolution: 0.1%)
  • Page 8: Dimensions

  • Page 11: Temperature Calibration

    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 ) digit of temperature display is flashing, other digits will go off. (3) Set the present correct temperature with key and key.
  • Page 12: Co 2 Calibration

    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 ) digit of temperature display is flashing, other digits will go off. (3) Press CAL key again.
  • Page 13: Control Specification

    Control specification Key and switch : 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. Press once to enter the device into setting mode. Press twice to enter the device into CO level setting mode.
  • Page 14 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 temperature check mode. Out of the range: 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.
  • Page 15 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”...
  • Page 16 : 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.
  • Page 17 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 calibration mode. Input a proper value with key and key then press ENT key to recognize and store a span calibrated value.
  • Page 18 F02: UV lamp 24hours sterilization mode set Note) UV lamp is optionally provided. <Direction Input “F02” on temperature display to show “000” on CO display. for use> Input “001” with key and key to enter the device into 24hours sterilization mode.
  • Page 19 F05: Display the voltage in CO sensor (A/D converter voltage in microcomputer on the main PCB) <Direction Input “F05” on temperature display and press ENT key to show the voltage in for use> sensor on CO display. Press ENT key to be Auto Zero forcibly performed within a minute.
  • Page 20 F09: Display the temperature in CO sensor box <Direction for Input “F09” on temperature display and press ENT key to show the use> temperature in CO sensor box. If you press ENT key or leave for 90seconds, automatically returns to PV display. In SV is +45 C, CO valve turns OFF when the temperature is out of SV 2.0 C.
  • Page 21 Followings are initial values in non-volatile memory: Internal temperature SV : 37.0 C level SV : 0.0% Balance value of humidifying heater (F06) : 12 Balance value of door heater (F07) zero adjustment data (F10) : 5000 span data (F11) : 5000 Internal temperature zero adjustment data (F15) : 008...
  • Page 22 F25: Ring Back time set (initial: 030 (30min), the range: 0~60min) <Direction for Input “F25” on temperature display and press ENT key to set current Ring use> Back delay time. Change the 2 digit to set delay time in the range of 0~60min.
  • Page 23: Wiring Diagram

    Wiring Diagram...
  • Page 24: Circuit Diagram

    Circuit Diagram...
  • Page 25: Components On Pcb

    Components on PCB...
  • Page 26: Connection On Pcb

    Connection on PCB The following shows connections of connector (CN) on main PCB. Connector Connects to Power transformer To supply the power to PCB. Between #1 #2, AC8.5V To supply the power AC36V for Auto zero air pump. #4 and #5, AC18V Power supply To supply the power to PCB.
  • Page 27: Co 2 Gas Circuit

    gas circuit Auto Zero air pump 25mm Cap. tube Filter Air pump Solenoid 25mm Cap. tube valve sensor T -connector Filter Filter Sample port (front) Gas supplied < Back view >...
  • Page 28: Prevention Of Contamination

    Prevention of contamination In servicing for CO incubator, it is important to prevent from contamination. (1)More than 90% of contamination in CO 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 incubator.
  • Page 30: Auto Zero Adjustment

    Auto Zero adjustment MCO-18AIC provides both the manual CO gas density calibration and the automatic Auto Zero adjustment. 1. CO gas density calibration When either the CO density SV or the display value is not match with the actual value, calibrate CO gas density according with “CO...
  • Page 31: Specifications Of Sensor

    Specifications of sensor Temperature/Resistance for temperature sensor 103AT-1 The measure of internal temperature (internal temperature, overheat protection) and ambient temperature Temperature Resistance Temperature Resistance Temperature Resistance ( C) (k ) ( C) (k ) ( C) (k ) 27.28 13.57 7.19 26.13 13.06...
  • Page 32: Parts Layout

    Parts layout agitating fan motor monitoring hole Auto Zero air pump Remote alarm terminal valve filter gas inlet...
  • Page 33 remote alarm terminal sensor BOX transformer for PCB noise filter sensor BOX temp. sensor thermal fuse IR sensor power comsumption resistance (R13) sensor BOX heater...
  • Page 34 gas inject port Overheat protect sensor Temp. sensor Inlet port of Sampling gas for CO sensor Return port of Sampling gas for CO sensor UV lamp connection port Water level sensor...
  • Page 35: Mco-18Uvs Installation Procedure

    MCO-18UVS Installation Procedure Kit of MCO-18UVS 1 UV label 1 UV caution label 1 UV lamp 1 UV door switch caution label 1 Name plate 1 UV lamp cover 1 ballast & glow assy 1 Patent label 6 screws (M 4) Procedure 4.
  • Page 36 6. Replace the duct. Place the humidifying tray, 8. Remove a cap shown in Fig. 7. then cover the tray with the humidifying tray By using 4 screws enclosed with this kit, cover as shown in Fig. 5 fix the ballast/glow assy as shown in Fig. 7. Humidifying tray cover Screw Fig.5...
  • Page 37 9. Connect each lead wire connector of ballast/glow assy, as shown in Fig. 8. Connect after removing the cover. Cover BLUE GREEN Fig.8 10. Attach the labels. UV door switch Name plate caution label UV label UV caution label Patent label Fig.9...
  • Page 38 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 Indication after operation operated Turn the power switch ON. The current chamber temperature is displayed.
  • Page 39: Mounting Procedure Of Mco-21Gc

    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 valve assy , and then remove the hose and capillary.
  • Page 40 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 by using the enclosed screws( 4.Remove cap and fix with 5.Connect the wiring harness of CO valve B to wiring harness from CN9 on Main board.
  • Page 41 Setting procedure of Control panel. When use MCO-21GC(the automatic CO cylinder changer system), it is necessary to set the MCO-20AIC/18AIC automatic gas switching mode according to the following procedures. Description of operation Indication after operation operated Turn the power switch ON. The current chamber temperature is displayed.
  • Page 42 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 Stop the gas supply of cylinder A and use cylinder B only for CO gas supply.
  • Page 43: How To Replace Water Level Sensor

    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...
  • Page 44: Mco-18Ps Installation Procedure

    Procedure < > When stacking 2 units of MCO-18AIC 1. Turn off the power switch and disconnect a plug of each unit. 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.
  • Page 45 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.
  • Page 46: Mco-18Sb Setting Procedure

    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 “ Fixing screws A” tentatively from where the clips were remove. 3.Set the “ Stacking base” and fix with screws tentatively fastened.
  • Page 47: Mco-21Sb Setting Procedure

    MCO-21SB Setting Procedure (Stacking base for stacking MCO-18AIC/17AIC/17AC/15AC on MCO-20AIC) 1. Stick the “ Buffer rubber” at each corner on the bottom of “ Stacking base”. Stick the “ Protective sticker” on the “ Stacking base” as shown in Fig.1.
  • Page 48: Instruction Manual

    Instruction manual This section is extracted and printed from Instruction Manual. If you find out “Refer to page ” in them, this page means not page in service manual but page in the lower corner of each page in the extract from Instruction manual. This page number is not corresponded with serial number in Service manual.
  • Page 50 1. No part of this manual may be reproduced in any form without the expressed written permission of SANYO. 2. The contents of this manual are subject to change without notice. 3. Please contact SANYO if any point in this manual is unclear or if there are any inaccuracies. SANYO Electric Biomedical Co., Ltd.
  • Page 51: Precautions For Safe Operation

    PRECAUTIONS FOR SAFE OPERATION It is imperative that the user complies with this manual as it contains important safety advice. Items and procedures are described so that you can use this unit correctly and safely. If the precautions advised are followed, this will prevent possible injury to the user and any other person.
  • Page 52 PRECAUTIONS FOR SAFE OPERATION WARNING Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to rain water. Only qualified engineers or service personnel should install the unit. The installation by unqualified personnel may cause electric shock or fire. Install the unit on a sturdy floor.
  • Page 53 PRECAUTIONS FOR SAFE OPERATION WARNING As with any equipment that uses CO gas, there is a likelihood of oxygen depletion in the vicinity of the equipment. It is important that you assess the work site to ensure there is suitable and sufficient ventilation. If restricted ventilation is suspected, then other methods of ensuring a safe environment must be considered.
  • Page 54 PRECAUTIONS FOR SAFE OPERATION CAUTION Select a level and sturdy floor for installation. This precaution will prevent the unit from tipping. Improper installation may result in water spillage or injury from the unit tipping over. Connect the unit to a power source as indicated on the rating label attached to the unit. Use of any other voltage or frequency other than that on the rating label may cause fire or electric shock.
  • Page 55 PRECAUTIONS FOR SAFE OPERATION CAUTION Be careful not to tip over the unit during movement to prevent damage or injury. Disconnect the power plug when the unit is not used for long periods. The deteriorated insulation may cause electric shock, current leakage or fire. Do not put the packing plastic bag within reach of children as suffocation may result Take care of the inside of the outer door.
  • Page 56: Cautions For Usage

    CAUTIONS FOR USAGE 1. Install on a sturdy and level floor Install the unit on a sturdy and level floor and take precaution for preventing tipping over. Inadequate installation may result in water leakage or injury from the unit falling or tipping over. 2.
  • Page 57: Labels On The Unit

    CAUTIONS FOR USAGE 10. Use clean containers The Petri dishes or bottles for culturing may cause contamination in the chamber. Clean the containers before storing them in the chamber. 11. Allow adequate space between the cultures When storing cultures in the chamber, keep the Petri dishes or bottles containing the cultures sufficiently apart from each other to allow adequate air circulation.
  • Page 58 UV lamp. For the replacement, contact Sanyo sales representative or agent. E18 will be displayed on the temperature indicator when the UV lamp is burned out. Contact Sanyo sales representative or agent for the replacement. 3. Location of UV lamp The UV lamp is located in the duct.
  • Page 59: Incubator Components

    INCUBATOR COMPONENTS 9 (inside) When MCO-18UVS is installed 15, 16 (inside) When MCO-18UVS is installed Rear right side Rear left side...
  • Page 60 INCUBATOR COMPONENTS 1. Outer door: Sticks to frame with magnetic seal. Door heater is installed in the door panel. The door opening is reversible. Contact Sanyo representative or agent to change the door hinge from left to right or vice versa.
  • Page 61: Control Panel And Keypad

    INCUBATOR COMPONENTS Control panel and keypad 1. Digital temperature indicator (TEMPERATURE C): Normally, this indicator shows the chamber temperature. In the setting mode, it shows the set value of the chamber temperature. If the self diagnostic function detects any abnormality, an error code will be displayed. 2.
  • Page 62: Remote Alarm Terminal

    INCUBATOR COMPONENTS Remote alarm terminal The remote alarm terminal is located at the rear right side. Remote alarm terminal The remote alarm terminal is a contact output. Normal : OPEN Abnormal : CLOSE Contact capacity : DC 30V, 2A Note: •...
  • Page 63: Installation

    INSTALLATION Installation site To operate this unit properly and to obtain maximum performance, install the unit in a location with the following conditions: Note: The ambient temperature must be at least 5 C lower than the set temperature. 1. A location not subjected to direct sunlight or direct air flow from an air conditioner 2.
  • Page 64: Prevent Contamination

    INSTALLATION Prevent contamination To prevent contamination of the chamber, select an appropriate location for installation as well as ensuring the complete disinfection of the chamber components. 1. Avoid hot and humid location Avoid location with high temperature and/or humidity as the presence of bacteria in the air is greater than in the normal environment.
  • Page 65: Before Commencing Operation

    BEFORE COMMENCING OPERATION Sterilizing of chamber and attachments Before first start-up of the unit, the chamber and internal attachments should be cleaned and sterilized as follows. Note: Take care not to damage the UV lamp or water level sensor at the time of removal or replacement of attachments.
  • Page 66: Connection Of Co 2 Gas Cylinder

    BEFORE COMMENCING OPERATION Connection of CO gas cylinder WARNING Check the gas type and ensure that it is fit for the purpose. Make sure that all pipes are connected correctly and are not liable to become disconnected. Ensure that the gas pressure is set at the specified value.
  • Page 67 BEFORE COMMENCING OPERATION Automatic CO cylinder changeover An automatic CO cylinder changeover system (MCO-21GC) is available as an optional accessory. This kit switches the gas supply line when one CO gas cylinder is empty. Note: The installation of MCO-21GC should be implemented by a qualified service personnel. After attachment of MCO-21GC, do the following: 1.
  • Page 68: Operating Instructions

    OPERATING INSTRUCTIONS Set of chamber temperature and CO density Table below shows the basic procedure for setting the chamber temperature and CO density. The upper limit alarm temperature setting is also shown in the table. Perform key operations in the sequence indicated in the table.
  • Page 69: Uv Lamp

    OFF means the accumulated time has exceeded about 1,000 hours and recommends the replacement of the lamp. When replacing the UV lamp, contact Sanyo sales representative or agent. • E18 is displayed on the temperature indicator when the UV lamp is burned out. In this case, replace the lamp immediately.
  • Page 70: Change Of Setting Of Uv Lamp On Period

    5 minutes or if only the outer door is opened repeatedly. • For the replacement of UV lamp, contact Sanyo sales representative or gent. Pressing CAL key for about 5 seconds leads the calibration mode.
  • Page 71: Key Lock Function

    OPERATING INSTRUCTIONS Key lock function This unit is provided with a key lock function. When the key lock is ON, change of temperature or CO density setting through the key pad is not available. Note: The key lock is set in OFF mode (L0) at the factory. Display Mode Function...
  • Page 72: Water Level Sensor

    OPERATING INSTRUCTIONS Water level sensor This unit is provided with a water level sensor for the humidifying pan. The sensor is set in active position with respect to the installation of the humidifying pan. Take care not to damage the sensor at the time of removal or installation of the humidifying pan.
  • Page 74: Setting Of Alarm Resume Time

    When MCO-21GC is installed, press BUZZER key to silence the alarm after changeover of gas supply line. • If one of E05 to E17 (except for E12, E13, and E14) is displayed, consult with a Sanyo sales representative or agent.
  • Page 75: Routine Maintenance

    ROUTINE MAINTENANCE WARNING Always disconnect the power supply to the unit prior to any repair or maintenance of the unit in order to prevent electric shock or injury. Ensure you do not inhale or consume medication or aerosols from around the unit at the time of maintenance.
  • Page 76: Removal Of Attachments

    ROUTINE MAINTENANCE Removal of attachments Note: Take care not to damage the UV lamp (when an optional UV system kit MCO-18UVS is installed) or water level sensor at the time of removal or replacement of attachments. 1. Close the valve of the gas cylinder and turn off the power. 2.
  • Page 77 ROUTINE MAINTENANCE 9. To removing the circulating fan, pull out the spring and then pull the fan. See Fig. 7. 10. Loosen and remove the screw fixing the clamp and remove the clamp. See Fig. 8 and Fig. 9. 11. By lifting the side support, take it off from the hooks. See Fig. 10. Fig.
  • Page 78: Filling The Humidifying Pan

    ROUTINE MAINTENANCE Filling the humidifying pan To fill the humidifying pan or to replace the water in the humidifying pan, do the following: 1. Lift the front side of the humidifying pan cover as shown in Fig. 1. 2. Pull out the humidifying pan toward you. See Fig. 3.
  • Page 80: Troubleshooting

    • HEPA filter is provided in the gas piping. If it takes much time to recover the gas density even though the gas pressure is normal, it may be that dust on the HEPA filter prevents the gas flow. Consult the Sanyo dealer or agent.
  • Page 81: Environmental Conditions

    ENVIRONMENTAL CONDITIONS This equipment is designed to be safe under the following conditions (based on the IEC 1010-1): 1. Indoor use; 2. Altitude up to 2000 m; 3. Ambient temperature 5 C to 35 4. Maximum relative humidity 80% for temperature up to 31 C decreasing linearly to 50% relative humidity at 40 5.
  • Page 82: Stacked Module

    STACKED MODULE This unit can be stacked by using the stacking kit. Following shows the procedure for stacking the unit. Consult with a Sanyo representative or agent prior to stacking procedure as such work involves dangers. WARNING Select a level and sturdy floor having enough strength for installation of stacked module.
  • Page 83 STACKED MODULE 6. Apply the protective sticker enclosed with the unit at each corner on the top of the lower unit to avoid scratches or damage. 7. Fix the stacking plate A at 2 locations on the top front of the lower unit by using 2 screws removed in step 3.
  • Page 84: Specifications

    SPECIFICATIONS Name Incubator Model MCO-18AIC External dimensions W620 x D710 x H900 (mm) Internal dimensions W490 x D523x H665 (mm) Interior volume 170 L Exterior Polyester finish baked on zinc galvanized steel Interior Stainless steel containing copper Outer door Acrylic finish baked on zinc galvanized steel...
  • Page 85: Performance

    PERFORMANCE Ambient temperature +5 C to 50 C (ambient temperature; 5 C to 35 Temperature control range ± 0.25 C* (ambient temperature; 25 C, setting; 37 C, 5%, no load) Temperature distribution ± 0.1 C (ambient temperature; 25 C, setting; 37 C, 5%, no load) Temperature variation control range...
  • Page 87 JK1148-250B...

Table of Contents