SERVICE MANUAL 0 - Panasonic Biomedical
Contents
1. E PE s asal sn di EH Li eTsTeTaTe Tae eSI T Te 4T TTA T zm DEDEDED 1H 1 Danna s 9 s f Basg a us 9 T aunime ana e 797 6590 uj 1 Ny elec 9090 ILS TH x28 SA eto HS a d s mco AS 1 apu po TLS ie Tu 192 mp T lt Uj ses z Ons ola ag aa oa ug ete ala ra D big bj 4 Voltage AC100V AC18V AC8 5V 24V1t1V 11Vt1V 75Vt0 3V 4 52V 0 1V 5V 0 1V 5Vt0 1V 144V 0 1V 14 22V tO 3V 5mV O 96 5mV CO 96 1mV C gl II Special function mode n luli M Output data indicator Function mode Temp indicator Functions C C C To set ouput ratios of door heater and gasket heater indicator 0 i 0 indi To calibrate temperature analog output CO indicator To caliarate CO analog output 4 CO indicator To calibrate O analog output CO 0 indicator To indicate output voltage of CO sensor or one of 0 sensor F06 To initialize non volatile memories Do not use All indication To check all LED and driver operation flashing CO indicator To indicate CO sensor box temperature NOTE F06 should not be used The indic2. amp U wn NELIUES WW owe Ue fee vM pe wA de re Sha S BR AQ 8 Special function mode gt gt se tte t t o o 5 5 8 n n 9 Auto zero function GINE NL MM Xll ls 1020 Lx 12 Instructions on replacing CO sensor and main P C B in Multigas Incubator MCO 175M gt 14 How to measure the output voltages of CO sensor and O sensor s s ss se 16 e Fault finding chart Bc esl eso ou Sar Rest RAD EP RE oue Ee ss 17 i Hi Features This unit has infrared CO sensor which can control CO density at high accuracy and could not be affected by humidity It is possible to show high reliability and high accuracy because this Sensor does not have any driving parts Contents of Specification changed e introduction of new type CO sensor P C B has been changed because new type CO sensor is not compatible with former type one in the aspect of circuit New type CO sensor is distinguished from former one as follows O poo Stamped SANYO on the case Silk printed 7FB 4 B101 005 00 on P C B board Stamped 17AI on the case Silk printed 7FB 4 B101 034 00 on P C B board lt Note gt Code mnber with
3. 0 density During this period the auto zero air pump will be turned off 2 Cycle of auto zero adjustment Power on 10 min passed 20 min passed 30 min passed 40 min passed 50 min passed 10 min 10 min 10 min 10 min 10 min 4 hours 3 Indication of auto zera adjustment During the auto zero adjustment indicators of CO density O density are locked as those densities were displayed on those indicators immediate before the auto zero adjustment the decimal point of those indicators are flashing It is possible to change the set values of CO density and O density during auto zero adjustment CO indicator Flashing lt Note gt When the set value of CO density is OX and that of O density is 18 1 21 9 those indicators does not displayed so the decimal point also couldn t be seen Auto zero adjusting method Auto zero adjustment is performd by adding a quater of difference between each measurements so as not to change the density rapidly For example 0 0 1 0 CO2 density The added value is 0 25 4 hours Auto zero adjustment OFF setting Auto zero adjustment is set OFF by special function mode F08 In case that auto zero adjustment does not be set you should observe Explanation on gas density calibration and autozero adjustment MCO 175M has two adjustment one is manual gas density calibration another is autozero adjustment 1 Gas density calibration If there is a diffe
4. mark is parts code of the bare board This number is not parts code of P C B assembly The products since Ser No 607 has been changed Refer to page 16 as to the required parts to repair M Ti Electric parts Standard and Specification CO sensor IR infrared light gas sensor Applied voltage Circuit DC 15V Light source DC5V Operation range 10 75 Using range O 607 sensor Applied voltage DC5V t0 2V O 7A Measuring range 2 18 22 70 Temperature sensor Thermistor sensor 103AT 1 To control the internal 25 10KQ temperature Overheat protection Thermistor sensor 103AT 1 To prevent the internal sensor 25 10KQ temperature abnormal rising CO sensor box sonsor Thermistor sensor 103AT 1 To control the temperature 257 10K0 inside of the CO sensor box Thermal fuse in CO Melting point 70 C To prevent the temperature sensor box inside of the CO sensor box abnormal rising Water level sensor SUS 304 To measure the water level in water jacket Pump AP 1500 RE To feed the sampling gas to sensors EL2 011YM To circulate the chamber air ATR K23 AC8 5V AC18V For control P C B Rate AC100V 103W 982 To heat the main chamber Door heater Rate ACIO0V 132W 760 To heat the main chamber additionally and to prevent the glass door condensing Gasket heater Rate 100 59W 1699 To prevent the gasket condensig
5. CO heater A Rate AC 61V Series To heat CO sensor box 195W 1902 CO heater B Rate AC 39V Series 125W 1212 Buzzer PKB 8 440 For alarm 12 13mA Solenoid valve PCS 241A M5 For 0 N gas DC24V 2W Noise filter ZCB2203 11 TDK To prevent miss feeding by AC240V 3A line noise Switching power RS 8 5 To supply O sensor CO supply DC5V 3A 15W sensor light source and control P C B with the Door switch V 013 1A3 OMURON AC125V 0 1A Function To measure the density of CO2 Zirconia solid shell FCX MW To measure the density of 02 power To check the door is closed or opened Principle of measuring Zirconia solid state electrolytic type Measuring range 0 95 Using range 2 1896 0 22 7096 O Power supply DC5V 0 2V Ambient temperature 45 C PID controlled Specification of sensor SS Principle of measuring Infrared optical sensor type Applied voltage Circuit DC 15V Light source DC5V Ambient temperature 45 C PID controlled rm EU Il i ill HIE ii f Alarm Safety Functions and Self diagnostic functions n This unit has alarm and saftey functions
6. NIVN LNdNI b vONS I O2 A Jo n Way Wav lv TINO 310N33 tia 8 202 YA 4 VA dWNd Aly 8 OND 18 s OINO dW d aly UNS oes di A AS B ABT ABI 6ND 2v 2v GND Ov END pe 2 1 ZINO ya 5 d6 AlddNS 4YIMOd AG E NE EERE 9 S N9 N9 Q Q ERE S AG 3201 A393 aood HLdv3 v 8 831V3H MN31V3H 3N31V3H 831V3H 431v3H AOLOW NIVN 4000 L133Sv9 209 702 9N 17009 LIGHT GREEN LIGHT BLUE SHIELD 8N2 9N2 3135 Wid H O Av 138 Av 138 31V3H NIVMW 331V3H 4000 831V3H 209 Avert Ate YELLOW WHITE 22d AN i woe OM 33M0d VdWNSLY OO VIOLET ORANGE S1nd 3 0403 83M0d Circuit diagram lt a S ITL OR i Bae BELI lt B8 oan 3 oo 51 m ESR os 1 l TEP 52505 Tee EI A 29 1 1 hr M UNE I oo fe i 1 l rm ee ee ee ee eee ee ee ee ee ee ee eee E dad s MN Ld mo qS BENE neo Ir E Q 5 ss I AE MAI po oR eo MAX o DPPOPPDDDPPPHVIOYVDDS
7. B gt Replace both new type CO sensor and new type main P C B 3 In ease of the unit which has already new type CO sensor and new type main P C B the unit from S No 607xxxxx onward or the unit has replaced them once at the service There is no problem either CO sensor or main P C B is replaced In this case it is not necessary to return a part not used In all above cases both CO zero adjustment and span adjustment should be performed after parts replaced as usual Besides the specificatoin of the product does not change due to changing of the specificatin of these parts Zero adjustment method 1 After replaced both CO sensor and main P C B run the unit for warming Up Check the internal temperature of the sensor box by function mode F09 The acceptable range is 45 1 C 2 In case that internal CO density is 0 Set the function mode F05 and press the ENT key Q Output of the CO sensor unit V will be indicated on CO display Turn on main P C B by using small screw driver to set 4 0 V of output voltage at 0 After adjusted press the ENT key to return to the normal display node 3 In case that internal CO density is not OZ D Set the function mode F05 and press the ENT key Q Press the ENT key again to return the present inside temperature display mode Within 60 second auto zero operation will start Auto zero air pump operates for about two 2 mins Again set the funcion mod
8. SERVICE MANUAL Multi gas Incubator MCO 175M N O CO Control Specification changed version Specification change June 1 996 SUMMARY Chopper type infrared sensor This service manual is specification changed which was used in Multi gas incubator MCO 175M version based on Service manual MCO 175M was changed chopperless type infrared sensor SM 720053 has been issued Temperature Room temperature 5 to 50C CO density 0 to 20 O2 density 2 to 18 22 to 70 With this change the control P C B has control circuit for chopperless type infrared sensor is adopted Performance specification does not change due to this change SM 720078 Contents tt PAGE Summary 5 t 5 5 5 5 5 5 5 5 t t Cover page Features fee eS o dO b pa ote las lw Ma l rA XO Le alk T 1 e Contents of specification changed gt sse 1 e Electric parts Gea uL SY UA QUA Se c V Sw how Vie eye SU je US 2 Specification of O sensor t o 3 Specification of CO sensor s t t t ee t n s 3 Alarm safety functions and self diagnostic functions c c 4 e Electrical diagram s sooo t o t 2 2 2 2 7 e Circuit diagram
9. and self diagnostic functions as fallows Table of Alarm and Safety function Upper limit temperature alarm If the temperature inside the unit exceeds the upper limit alarm tempcrature sct value Automatic set tempera ture alarm Automatic sct CO density alarm Auto return Key lock switch Automatic calibration function Empty CO gas cylinder Temperature sensor abnormality CO sensor abnormality Temperature sensor of the CO sensor is abnormal Main heater abnormality Bottom heater abnormality CO sensor heater abnormality Heater SSR open circuit Operation of sampling Bas pump or auto zero pump is faluty The remote alarm is interlocked with the buzzer not be stopped with the BUZZER key If the internal tempera ture deviates from the temperature by 1 or more If the internal CO density deviates from the set value by 1 or more If a key operation is not performcd for about 90scc in cach sctting modc When the kcy lock switch is turned ON Normally the zero point of the sensor are calibrated every 4 hours or so every 10min for the first hour after the power is switched ON using the atmosphcre as the gas to be calibrated If the CO density does not increase when the CO valve is open If the temperature scnsor is open circuit or short circuit If the output voltage of the CO sensor is abnormal If the temperature scnsor of CO sensor is o
10. ation of O sensor output voltage in F05 displays a valid value after more than four minutes have elapsed since the O density was set It is possible to check and change all functions or all sections by using these Special function modes Operation method 1 Press the CAL key for about 5 seconds 2 The top digit of the temperature indicator will flash and the other indicators will go out 3 Set the top digit to F with the 4 key 4 Set the remaining digits to the desired function numer with the amp and gt gt keys 5 Confirm that there are no errors then press the ENT key Auto zero function WI This unit uses the infrared CO sensor and it has to be adjusted sometimes Auto zero function operates every 4 hours but in the first one hour after the unit started this function operates every 10 minites total 6 times Refer to the following timing chart 1 Mechanism of auto zero adjustment O Operate the auto zero pump for 2 minutes to feed ambient air to CO sensor During this period the sampling air pump will be turned off Because CO density is almost 0 0 03 0 07 and O density is almost 20 in ambient air adjust automatically that the measured CO is 0 and the measured O density is 20 O Then operate the sampling air pump for 2 minutes to compare the ambient CO density and Os density with the internal CO density
11. d through the following steps E03 and E04 are self kept until pressed the buzzer key Timing of check E01 E04 Check every minutes When same conditions continues three times error code could be decided Accordingly it takes 3 minutes to decide the error code and 1 minutes to release automatically E05 E08 Check every 0 5 seconds But it needs several seconds to decide the error code due to the delay of filter E09 E12 Check every 4 minutes When same conditions continues two times E13 Auto error code could be decided Accordingly it takes 8 minutes to decide the error code and 4 minutes to release automatically Check only when the auto calibration is carried out Accordingly it could not be decided and auto released until auto calibration is carried out calibration functions CO autozero adjustment O autospan adjustment Auto calibration operates for 4 minutes every 10 minutes in first 1 hour after the temperature of sensor box temperature control sensor reached within 45410 since powered the unit on But after this first 1 hour it Operates every 4 hours Auto calibration takes two minutes to feed ambient air and more two minutes to reset the sensor Total time is 4 minutes lVNINW331 1ND233 OWSLI 02 82d d I d8I DINO 9INO2 4OSN3S 193108d 4340 7o s 1
12. der operation is in the following condition 1 The temperature of sensor box is stable 2 02 sensor is not during warming up O indication when O sensor is warming up is as follows GND CN6 a 2 a z lt x R47 VRI Fault finding chart Poor temperature control e Condensation on inner door Defective temperature sensor EO5 indication Main heater trouble E09 indication Inside fan does not rotate Under overheat protection operation Poor sealing of inner door gasket Poor sealing of outer door gasket Check point e Temperature sensor goes open circuil or short circuit Measure the resistance of main heater e Defective power board e Fan motor e Falling out of fan e Door switch operation Set value of overheat protection Overheat protection sensor f gasket has no trouble adjust using Function mode 01 In this case if getting larger the input number condensation on inner door could be reduced but condensation inside the chamber may be increased Therefore you must do adjustment care fully while watching the situation Poor CO density control o Internal gas density is low Internal gas density is high Density fluctuates widely Empty gas cylinder E01 indication Defective air pump for gas circulation Defective autozero pump Gas circulation blocking Air going into gas ci
13. dicator E12 will be displayed alternately with the tem perature on the tempera ture indicator EI3 will bc displayed atternatcly with the temperature on the temperature indicator An intermittent tone will be emitted after a delay of 15 min An intermittent tone will be emitted after a delay of 15 min Intermittent Intermittent Intermittent Intermittent Intermittent intermittent Intermittent Intermittent Intermittent The setting mode will be cancelled Key inputs will disabled The CO valve will be closed Sensor box heater The CO valve will be closed The buzzer tone resul ting from the upper limit temperature alarm can EOI will be cleared automatically when the gas is connected correctly and the buzzer silenced with the BUZZER key 4 Self diagnostic function How to judge error code Exx When detected the trouble by self diagnostic function the following error codes and temperature will be displayed alternately E0 2 E037 E04 EO5 E06 Eo7 E08 Empty CO gas It is activated if the rising of CO density is less than 0 2 XCO min when opened CO valve Empty O N gas It is activated if the changing speed of density is less than 0 2 O2 min V1 04 or less than 0 1 O2 min V1 05 when the O2 N2 valve is open E02 indication Valve auto change operation LED of emp
14. e F05 and press the ENT key Output of the CO sensor unit V will be indicated on CO display Turn VRI on main P C B by using small screw driver to set 4 0 V of output voltage at Oz After adjusted press the ENT key to return to the normal display mode Span adjustment method 1 2 3 Set the CO density Wait till the indication is stable fully Press the CAL key for about five 5 sec The highest digit on temperature indication will be flashing Other digits will go out Press the CAL key again The highest digit on CO indication will be flashing Other digits will go out Input the actual internal density and press the ENT key Return to the normal display mode automatically il How to measure the output voltages of CO sensor and O sensor To measure A D converter input voltage V of CO sensor output and that mV of sensor output use Function mode F05 as mentioned above The following methods also measure these A D converter input voltages D A D converter input voltage V of sensor output Voltages in both ends of R47 on the main P C B as mentioned above Q A D converter input voltage mV of O sensor output Between 42 GND and 4 SIG of CN6 on the main P C B Note When measure the voltage of O sensor confirm that O sensor is under operation What is 0 sensor is un
15. pen circuit or short circuit If the upper limit tempe raturc alarm operates or if the main heater is open circuit or if the main heater SSR is short cir cuit If the bottom heater is open circuit or if the bottom heater SSR is short circuit If the CO sensor heater is open circuit or the CO sensor SSR is short circuit If the SSR of the main heater door heater or CO sensor heater is open circuit If the sampling gas pump or auto gas pump docs not operate The upper limit tempera ture alarm indicator lamp will light and E09 or E12 will appear on the tem perature indicator All digits on temperature indicator will flash All digits on thc CO density indicator will flash Normal display mode The decimal point period of the CO density indi cator will flash 0 will be displayed alternatcly with the tem perature on the tempera ture indicator E05 will be displaycd alternately with the tem perature on the tempera ture indicator E06 will be displaycd alternately with the tem perature on the tempera ture indicator E08 will be displayed alternately with the tem perature on the tempera ture indicator E09 will be displayed alternately with the tem perature on the tempera ture indicator E10 will be displayed alternately with the tem perature on the tempera ture indicator Elf will be displayed alternately with the tem perature on the tempera ture in
16. rcula tion Leakage from CO electro magnetic valve Wrong gas connection E03 indication Half blocking of gas cir culation Defective CO2 sensor Check point Residual quantity in gas cylinder e Gas supplying pressure e Air pump for gas circula tion operation Air pump power supply e Crushing of the piping eDrops inside piping Dirty interior of filter e Condensation inside filter and containing water e Clogging of glass capillary tube Broken piping e Crack of filter case Loose connector of CO sensor and sensor Falling out or pinching of 0 sensor and O ring e Leakage from electro Magnetic valve Connecting point of gas eDrops inside piping Air going into gas cir culation eOutput voltage of CO sensor Temperature control of sensor box ePoor 0 density control feeding gas into the chamber When O density is set lower O j density does not decrease When 0 density is set higher density does not increase Gas feeding into the chamber is too much S Density fluctuates widely Empty gas cylinder E02 indication Defective air pumu for gas circulation Gas circulation blocking Air going into gas circula tion Leakage from 02 Nz electro magnetic valve Half blocking of gas cir culation Defective O2 sensor zug Check point Residual quantity in gas cylinder eGas supplying press
17. rential between internal density set value or displayed value and actual measured value calibrate gas density and enter actual measured value again As far the procedure refer to Page 15 16 of Service manual MCO 175M SM720053 Auto zero adjustment Refer to Page 12 of this manual Operations of two adjustments The relationship between two adjustments is shown in figure below EX CO density 5 C02 i eyes deen tege sud teeta End Ideal line of set value with actual measured value Note In fact it could not make straight line due to the characteristics of the sensor Point calibrated by gas density calibration gt P v c 2 Q lt 0 5 Set densi ty XCO Point calibrated by auto zero adiustment a Instructions on replacing CO sensor and main P C B Tm ill Multigas Incubator MCO 175M il The specifications of CO sensor and main P C B have changed since the production from S No 607xxxxx onward of July in 1996 Please follow the following directions in case of servicing Even if you order only either a CO sensor 624 182 3774 or a main P C B 624 182 2401 a set 624 205 8700 of new type CO sensor and main P C B will be supplied 1 In case of replacing an old type CO sensor gt Replace both new type CO sensor and new type main P C B 2 In case of replacing an old type main P C
18. temperature sensor It is activated if the value that converted the resistance of sensor box temperature sensor into temperature is more than 60 or less than Ot Sensor box heater is OFF EQ E 1 E 1 E 9 Main heater goes open circuit or SSR for main heater goes short circuit 0 Door heater and gasket heater go open circuit or SSR for door heater goes short circuit Besides door and gasket open simultaneously 1 Heater for sensor box goes open circuit or SSR for sensor box heater goes short circuit 2 Any SSRs for heater goes open circuit 3 Abnormality of auto calibration It is activated if differential between the sensor output voltage immediately before auto calibration is carried out and the sensor output voltage when feeding air is less than 150mV when CO set value is more than 3 5XCO and CO displayed value is more than 3 5 C02 It ignores the values calculated by CO autozero adjustment and O autospan adjustment It is supposed that pipes for gas sampling and for auto calibra tion is broken or defective air pump Alarm buzzer sounds intermittent tone synchronized with error code Press the buzzer key to stop the buzzer Remote alarm contact is interlocked with the alarm buzzer If turn the alarm buzzer off the remote alarm contact turns also off Even if the buzzer key is not pressed error codes except E03 and E04 are released when normal conditions are checke
19. ty gas cylinder is flashing Wrong connection with CO gas cylinder It is activated if CO density is rising more than 1 0 XCO min even when CO valve is closed There is a possibility that Oz Ns valve is connected with CO gas cylinder CO valve and O N valve are OFF Wrong 0 N gas feeding It is activated when density is set less than 18 0 0 if the O density is rising more than 0 7 X0 min and over 2340 after opened O2 Nz valve CO valve and 0 N valve are OFF It is supposed that although N gas has to be fed 0 gas is been feeding By contraries it is activated when O density is set more than 22202 if O density is falling more than 0 7 X0 min and below 1720 after opened O N valve CO valve and 02 N valve are OFF It is supposed that although O gas has to be fed Nz gas is been feeding Temperature sonser goes short circuit or open circuit It is activated if the value that converted the resistance of temperature sensor into temperature is more than 60 or less than 0t Main heater door heater and gasket heater are OFF Abnormality of CO sensor input vol tage It is activated if the A D converter input voltage of CO sensor output is less than 1000mV or more than 4500mV CO valve is OFF Abnormality of O sensor input vol tage It is activated if the A D converter input voltage of 0 sensor output is less than 3mV or more than 3000mV 0 valve is OFF Abnormality of sensor box
20. ure e Air pump for gas circula tion operation e Relashion of conncetion port A B with electro magnetic valve A B using e Crushing of the piping eDrops inside piping eDirty interior of filter e Condensation inside filter and containing water eClogging of glass capillary tube Broken piping e Crack of filter case e Loose connector of CO sensor and O sensor eFalling out or pinching of 0 sensor and ring e Leakage from electro magnetic valve eDrops inside piping e Air going into gas cir culation Output voltage of 0 sensor f e Temperature control of sensor box S4720076 RGB 07 amp 2 B ZR SERVICE MANUAL GR r FEAT ADS IM TAT URES OR ER sea RP AT uu NE s y amp d5 DOR EARTH 8b WBORAMTERO BY BB sm m 8 mE O JB IW I a LER 2H BME 18 2g 188 20 8 EA TE 2038 mmm MED g 823 238 J CA2792 100B
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