hcu20senglish service manual

Heater-Cooler Unit HCU 20

Service Manual

The information in this document may change without notice. Names anddata used in examples are fictitious unless otherwise noted. No part ofthis document may be reproduced, transmitted or transcribed, in any formor by any means, without the prior written permission of Jostra AB.

Copyright 1998 Jostra AB. All rights reserved.

Jostra ABAnnedalsvgen 2 B227 64 Lund, SWEDENPhone: +46 46-33 31 00Fax: +46 46-33 31 05

Article number: 923651Change order: J681

Heater-Cooler Unit HCU 20 Contents

Service Manual Art.no. 923651 C.o. J681 3

Contents

1. General ................................................................................................. 51.1 Description of function ................................................................... 5

1.1.1 Patient mode............................................................................ 51.2 Front view of the HCU 20 .............................................................. 61.3 Rear view of the HCU 20 ............................................................... 71.4 Front panel of the HCU 20 ............................................................. 81.5 Remote control unit RCU 20-610................................................... 9

2. Functional description ...................................................................... 102.1 Flowchart ...................................................................................... 102.2 Flow outline .................................................................................. 112.3 Inside of the HCU 20.................................................................... 122.4 Board placement ........................................................................... 13

3. Maintenance....................................................................................... 143.1 Daily ............................................................................................. 143.2 Weekly .......................................................................................... 143.3 Monthly......................................................................................... 14

3.3.1 Checking the remote control function................................... 153.4 Annually ....................................................................................... 15

4. Service................................................................................................. 164.1 Competence of the service engineer ............................................. 164.2 Disassembly and replacements ..................................................... 174.3 Changing the UV-lamp................................................................. 184.4 Calibrations and adjustments........................................................ 194.5 Filling an empty unit..................................................................... 194.6 De-airing the internal circulation.................................................. 194.7 Checking the minimum temperature............................................. 204.8 Checking the maximum temperature............................................ 204.9 Calibrating the minimum water level ........................................... 204.10 Calibrating the maximum water level......................................... 20

5. Service terminal ................................................................................. 215.1 Calibrating the minimum water level ........................................... 235.2 Calibrating the maximum water level........................................... 235.3 Storing the temperature sensor calibration values........................ 245.4 Checking the temperature sensor calibration values .................... 255.5 Choice of language ....................................................................... 255.6 Storing the UV-lamp intensity...................................................... 265.7 Storing the UV-lamp limit ............................................................ 26

6. Display and error messages .............................................................. 276.1 Display messages when switching on........................................... 276.2 Display messages.......................................................................... 276.3 Error messages.............................................................................. 28

7. Technical data.................................................................................... 29

Contents Heater-Cooler Unit HCU 20

4 Art.no. 923651 C.o. J681 Service Manual

Appendix A...........................................................................................A-1Electrical diagrams and drawings .....................................................A-1

Appendix B...........................................................................................B-1Spare parts list...................................................................................B-1

Heater-Cooler Unit HCU 20 General


1. General

1.1 Description of functionThe Jostra Heater-Cooler Unit HCU 20 supplies temperature-controlledwater for blood heat exchangers in extracorporeal circulation and forblankets with which patients can be warmed or cooled.

The water temperature is adjustable from 3 C to 41 C. A 33 litre tankof ca. 3 C cold water assures quick cooling of the patient.

Two external water circuits can be attached, each with their own water-flow adjustment system (but with a common temperature control).

A safety system monitors the regulation in order to prevent thetemperature from rising above 42 C.

The HCU 20-602 and the HCU 20-603 have a UV-lamp in the water tankto prevent the growth of algae, fungus, mould, bacteria and othermicrobes. The HCU 20-600 and the HCU 20-601 are prepared for aUV-lamp.

The differences between the HCU 20-600 and the HCU 20-602 versusthe HCU 20-601 and the HCU 20-603 are the circulation method, theflow capacity and the maximum pressure (see 7. Technical data).

The HCU 20 is supplied with the remote control cable RCC 20-611 andthe water supply tubing WST 20-700. The remote control unitRCU 20-610 is optional.

NOTE Use an independent power supply, protected by a 20 A automaticthermic fuse.

WARNING The radiation from the UV-lamp in the water tank is instantlyinjurious to the eye. Never look down the funnel of the water tank.Keep the lid on whenever possible. Never risk exposure duringdisassembly.

1.1.1 Patient modeTo prevent a too abrubt heating or cooling, the water temperature is onlyallowed to deviate from the temperature of the patient by certain values,gradients, in patient mode. This provides a more physiologicallyoptimised heating and/or cooling than the direct setting of the watertemperature.

General Heater-Cooler Unit HCU 20


1.2 Front view of the HCU 20

1

2

3

4

5

6

7

8

9

10

11

12

13

Fuses

Press the screws and turn them turn counter-clockwise to open thelid over the automatic fuses.

Normal fuse positions

Compressor: pressed in

Pump: pressed in

Heater: to the right

1. Funnel for the water tank

2. Front panel

3. Mains switch

4. Fuses

5. Stopcock for the right circulation (open in vertical position)

6. Stopcock for the left circulation (open in vertical position)

7. Inlet (suction side) of the left circulation

8. Outlet (pressure side) of the left circulation

9. Outlet (pressure side) of the right circulation

10. Inlet (suction side) of the right circulation

11. Cover for service

12. Opening for tank overflow

13. Wheels with foot-lever operated brake

NOTE Keep the lid of the fuse box closed during normal operation.



1.3 Rear view of the HCU 20

1

2

3

4

5

6

7

8

1. Funnel for the water tank

2. Mains cable holder

3. Socket for remote control and service terminal

4. Automatic fuse for the mains circuit

5. Connection for potential equalization

6. Type label

7. Mains cable

8. Drain cock for the water tank

General Heater-Cooler Unit HCU 20


1.4 Front panel of the HCU 20

1. Set temperature (alphanumeric display)

2. Water temperature, temperature of the cold water or water level(alphanumeric display)

3. Patient temperature or error codes (alphanumeric display)

4. Circulation on/off buttonLit when circulating.

5. Local/remote buttonLit when remote control is on.

6. Adjustment knobHold down the Set Temp. button and turn the adjustment knob to set atemperature.

7. Audio off buttonFlashes when the present acoustic alarm is switched off. The acoustic alarm returnswith every new alarm condition.

8. Cooling LEDLit when cooling the water.

9. Heating LEDLit when warming the water.

10. Tank temperature buttonPress to see the temperature in the cold water tank in the middle display. Presstogether with the Set temp. button for three seconds to see the water level in themiddle display.

11. Set temperature button (2.9 C to 41 C)Hold down this button and turn the adjustment knob to set a temperature. Presstogether with the Audio off button to alter the brightness of the displays in threegrades



1.5 Remote control unit RCU 20-610Connect the remote control cable RCC 20-611 to the remote controlsocket at the rear side of the HCU 20. Connect the other end to the socketat the underside of the remote control unit.

1 2

1. Temperature sensor socket (for the YSI 400 series manufactured byYellow Springs or other compatible sensor)

2. Remote control cable socket (9-pin DSUB)

Functional description Heater-Cooler Unit HCU 20

10

2. Functional description

2.1 FlowchartThe outlet water is taken from the water tank or the heater (or both)depending on the position of the motor valve.

T: Tem e sensor for measuring and control (and to prevent over-hea e system is accidentally operated without water)

P: Pres

Flowchperaturting if thArt.no. 923651 C.o. J681 Service Manual

sure sensor to measure the water level

art: HCU 20-600 with pressure and suction pump

33 litres

Heatexchanger

Manualcontrolvalves

Heater-Cooler Unit HCU 20 Functional description


2.2 Flow outline

Flow outline: HCU 20-600 with pressure and suction pump

Functional description Heater-Cooler Unit HCU 20


2.3 Inside of the HCU 20

1. Water tank

2. Overflow tube

3. Regulator for the mixing valve

4. Tank temperature sensor

5. Outlet temperature sensor

6. Heater temperature sensor

7. Mixing valve

8. Heater

9. Water level (pressure) sensor with tube

10. Drain tube

11. Pump

Heater-Cooler Unit HCU 20 Functional description


2.4 Board placementOpen the front panel to reach the control board and the power supplyboard. Remove the stainless cover to reach the control board.

Control board

Power supply board

Maintenance Heater-Cooler Unit HCU 20


3. Maintenance

WARNING The radiation from the UV-lamp in the water tank is instantlyinjurious to the eye. Never look down the funnel of the water tank.Keep the lid on whenever possible.

CAUTION Do not use any fully desalinated or distilled water as this would etchthe copper cooling spirals and the heater core.

1, 4

2, 5

3

3.1 Daily1. Check that the water level is 33 litres.

2. Check that air can circulate unobstructed to the condenser (rear side)to ensure good cooling capacity. The unit must be at least 30 cm fromwalls or cupboards.

3.2 Weekly3. Empty the cold water tank through the drain cock underneath.

4. Refill with new softened water (through the funnel on top).

3.3 Monthly(or after every 100 hours of operation)

5. Clean the condenser at the back with a brush.

Heater-Cooler Unit HCU 20 Maintenance


3.3.1 Checking the remote control functionPress the local/remote button on the HCU 20 for three seconds, when itis connected to the HL 20 or the RCU 20-610, to enter the remote controlmode. The local/remote button should light up and an acoustic signalsound.

3.4 AnnuallyA complete service by a service engineer is recommended, includingcalibration of the minimum and the maximum water levels and thecomponents, check of the minimum and the maximum temperatures andchange of the UV-lamp.

Service Heater-Cooler Unit HCU 20


4. Service

WARNING Refrigeration circuit repairs (except the condenser fan) must beperformed by Jostra service personnel. Recharging and replacementsmay be subcontracted to a competent refrigeration organisation.

The HCU 20 must never be laid on its side. If accidentally put inanother position, it must stand upright for at least 24 hours beforeoperation.

4.1 Competence of the service engineerThe service should be performed by a qualified service engineer to assurethat the unit is maintained satisfactory. Qualification requires:

Practical experience of the product, the HCU 20. Access to the recommended spare parts, supplied by Jostra. Access to and understanding of the User Manual and the Service

Manual regarding the HCU 20 model which is to be serviced.

Heater-Cooler Unit HCU 20 Service


4.2 Disassembly and replacements

WARNING The radiation from the UV-lamp in the water tank is instantlyinjurious to the eye. Disconnect the power supply beforedisassembly.

The temperature sensors may only be changed by Jostra authorizedpersonnel.

The top panel is held by four screws. In the rearend of the top panel there is a rubber tube whichgoes down to the water tank. When the top panel isremoved the tube is pulled out of the tank.

The front panel can be opened after the removal ofthe top panel and the two screws above thestopcocks. It is mounted on hinges in the top end.

The lower panel is held by three screws in theupper end and three nuts in the lower end.

The valve panel can be lifted up and pulled outafter the removal of the front panel and the lowerpanel.

NOTE Empty the water tank and connect tubes to the outlets and open thestopcocks to release the pressure before removing any components inthe water circuit.

To remove the motor valvefirst unscrew the mountingplate to get access to the valvefastening screws.

Mixing valve

Tanktemperature

sensor

Toppanel

Mountingplate

Valvepanel

Frontpanel

Stopcocks

Lowerpanel



4.3 Changing the UV-lamp

NOTE Replace the UV-lamp annually.

WARNING The radiation from the UV-lamp in the water tank is instantlyinjurious to the eye. Disconnect the power supply beforedisassembly.

1. Disconnect the power supply and remove the top panel.

2. Loosen the cord squeezing screws and unscrew the lamp cord end ofthe connection box (A). Pull out the contents and loosen theconnection screws.

3. Unscrew the lamp holder (B).

4. Remove the lamp with the cord (C).

5. Connect the service terminal, see 5. Service terminal. Light into thetank with a flashlight and check that the UV-INT value changes (onthe JNS HYPO II page), to see that the lamp sensor is working.Disconnect the service terminal.

6. Disconnect the power supply again.

7. Lower the new lamp carefully into the holder at the bottom of thetank (D). Mount the upper lamp holder and the cord connection.

8. Mount the top panel.

9. Store the UV-lamp intensity, see 5.6 Storing the UV-lampintensity.

10. Store the UV-lamp limit (if the old value should be changed), see5.7 Storing the UV-lamp limit.

B

C

D

A

Heater-Cooler Unit HCU 20 Service


4.4 Calibrations and adjustmentsTo calibrate components and to adjust the temperature controller (e.g.after a replacement), contact Jostra service.

4.5 Filling an empty unitFill a completely empty unit as follows, to avoid an airlock in the pump.

1. Prepare a length of tubing with a Walther type male " quickconnector at one end and a connector suitable for your soft watersupply at the other.

2. Connect the tubing between one outlet of the unit and the soft watersupply.

3. Switch the unit on and press the Set Temp. and the Tank Temp.buttons simultaneously for three seconds to see the water level in themiddle display.

4. Open the outlet stopcock of the unit and turn on the water supply. Fillto a level of 33 litres.

5. Turn off the water supply and close the outlet stopcock. Remove thetubing from the water supply.

6. Press the Tank Temp. button to leave the level mode.

NOTE If the water tank is over-filled or if a maximum filled unit is movedthe superfluous water is released through the overflow opening(above the left front wheel).

4.6 De-airing the internal circulation1. Prepare a short transparent tubing with a Walther type male " quick

connector at both ends.

2. Connect the tubing between one outlet and the corresponding inlet.Open the outlet stopcock.

3. Switch the unit on and hold down the Set temp. button and turn theadjustment knob to set the temperature to 2.9 C (tank mode). Waittill the display message TANK stops flashing.

4. Press the circulation button. Circulate until no bubbles can be seen inthe tubing and the water pump runs with an even, gentle sound. Theinternal circulation is now free of air.



4.7 Checking the minimum temperature1. Switch on the unit and let it cool down the water in the tank (this may

take up to 60 minutes depending on the initial temperature of thewater).

2. Connect the heat exchanger and the blanket.

3. Place the probe of an accurate temperature recorder in the tubing nearthe outlet.

4. Set the temperature to 2.9 C (tank mode) and wait until the displaymessage TANK stops flashing. Start the circulation.

5. When the middle display shows that the outlet water has reached theset temperature, wait one minute and check that the temperaturerecorder shows a stable temperature that corresponds to the settemperature.

4.8 Checking the maximum temperatureFollow the steps in 4.4 Check the minimum temperature, but set thetemperature to the maximum 41 C instead. It is not necessary to waituntil the water in the tank is cooled down.

4.9 Calibrating the minimum water level1. Empty the tank.

2. Set the temperature to 5.9 C.

3. Switch off the unit and back on again.

4. During the initial self-test at switch on, press the Set Temp.,local/remote and Audio off buttons simultaneously until the threedisplays show SET OFF SET.

5. Press the Set Temp. and the local/remote buttons simultaneouslyto store the current water level as zero.

4.10 Calibrating the maximum water level1. Fill up the tank to the maximum.

2. Set the temperature to 5.9 C.

3. Switch off the unit and back on again.

4. During the initial self-test at switch on, press the Tank Temp.,local/remote and Audio off buttons simultaneously until the threedisplays show SET NIV 25.0.

5. Turn the adjustment knob until the patient temperature display shows33.4.

6. Press the Set Temp. and the local/remote buttons simultaneouslyto store the water level.

Heater-Cooler Unit HCU 20 Service terminal


5. Service terminalIn this section, text on the service terminal is written in the type-faceCourier like this and entries are indicated by underlining like this.

Entered values are echoed and the user is asked to confirm them.

WARNING A service terminal must be connected and used by a service engineerwith the competence described in 4.1 Competence of the serviceengineer.

Interface

Serial RS232 9600 Baud 8 data Bits 1 stop Bit No parity

Usage

1. Connect a terminal to the service terminal socket of the HCU 20according to the interface characteristics.

2. Cold-start the HCU 20 and wait until the terminal has completedthe JNS HYPO II page.

3. Press to enter the HYPO SERVICE-MENU.

Service terminal Heater-Cooler Unit HCU 20


HYPO SERVICE-MENU

HYPO SERVICE-MENU: --------------------------

1 Initialise EEPROM on controller board 2 Reset hour meter on controller board 3 ZERO water level 4 Calibrate water level 5 Init. Temp. SENSOR calibration values 6 SET Temp. SENSOR calibration values 7 Check Temp. SENSOR calibration values 8 Select speech T Activate test output U Store UV-LAMP value S Set UV-LAMP limit

Q QUIT

YOUR SELECTION :

WARNING Never select option 1. The EEPROM may only be initialised byJostra service in some exceptional cases.

Never select option 2. The hour meter may only be reset by Jostraservice.

It should not be necessary to use option 5. If the temperaturesensor calibration values are initialised, there will be temperaturedeviations until all accurate values have been restored.

Wrongly set values on the service terminal could be hazardous to thepatient.

NOTE Option T displays a record of test values. These are normally usefuljust for Jostra service.

After use

1. Choose Q QUIT in the HYPO SERVICE-MENU.

2. Switch off the HCU 20 and disconnect it from the terminal.



5.1 Calibrating the minimum water levelThis can also be done without a service terminal, see 4.9 Calibrating theminimum water level.

1. Empty the tank.

2. Choose 3 ZERO water level on the HYPO SERVICE-MENU:

YOUR SELECTION : 3

Set water level offset Y / N ?:Y

5.2 Calibrating the maximum water levelThis can also be done without a service terminal, see 4.10 Calibratingthe maximum water level.

1. Fill up the tank to the maximum.

2. Choose 4 Calibrating water level on the HYPO SERVICE-MENU:

YOUR SELECTION : 4

Calibrate water level Y / N ? Y

CALIBRATE WATER-LEVEL -----------------------

LITER (25.0 ... 35.0): 33.4

PASSED



5.3 Storing the temperature sensorcalibration values

WARNING The temperature sensor calibration values may only be stored byJostra authorized personnel.

A label with the serial number and the calibration values is attached tothe cable of the sensor. For an accurate temperature control, these valuesmust be entered like in the example below. (Just press Enter to keep anold value.)

1. Choose 6 SET Temp. SENSOR calibration values on the HYPOSERVICE-MENU:

YOUR SELECTION : 6

STORE NEW CAL-values into serial EEPROM!

serial number R-0C R-50C

HEATER CONTROL SENSOR: INIT C-HEA 100.000 119.400 HC: 61831 100.232 119.640 HC: 61831 100.232 119.640 values OK (Y/N)?:Y

HEATER SAFETY SENSOR: INIT S-HEA 100.000 119.400 HS: 61831 100.124 119.518 HS: 61831 100.124 119.518 values OK (Y/N)?:Y

MIXER CONTROL SENSOR: INIT C-MIX 100.000 119.400 MC: 61832 100.181 119.576 MC: 61832 100.181 119.576 values OK (Y/N)?:Y

MIXER SAFETY SENSOR: INIT S-MIX 100.000 119.400 MS: 61832 100.121 119.509 MS: 61832 100.121 119.509 values OK (Y/N)?:Y

COLD-W CONTROL SENSOR: INIT C-COL 100.000 119.400 WC: 61834 100.094 119.491 WC: 61834 100.094 119.491 values OK (Y/N)?:Y

COLD-W SAFETY SENSOR: INIT S-COL 100.000 119.400 WS: 61834 100.157 119.557 WS: 61834 100.157 119.557 values OK (Y/N)?:Y

HEATER CONTROL SENSOR: HC: 61831 100.232 119.640

HEATER SAFETY SENSOR: HS: 61831 100.124 119.518

MIXER CONTROL SENSOR: MC: 61832 100.181 119.576

MIXER SAFETY SENSOR: MS: 61832 100.121 119.509

COLD-W CONTROL SENSOR: WC: 61834 100.094 119.491

COLD-W SAFETY SENSOR: WS: 61834 100.157 119.557

values OK (Y/N)?:Y New CAL-values stored!



5.4 Checking the temperature sensorcalibration values

1. Choose 7 Check Temp. SENSOR calibration values on theHYPO SERVICE-MENU:

YOUR SELECTION : 7

serial number R-0C R-50CHEATER CONTROL SENSOR: HC: 61831 100.232 119.640

HEATER SAFETY SENSOR: HS: 61831 100.124 119.518

MIXER CONTROL SENSOR: MC: 61832 100.181 119.576

MIXER SAFETY SENSOR: MS: 61832 100.121 119.509

COLD-W CONTROL SENSOR: WC: 61834 100.094 119.491

COLD-W SAFETY SENSOR: WS: 61834 100.157 119.557

CAL-FAC CRC OK!

5.5 Choice of language1. Choose 8 Select speech on the HYPO SERVICE-MENU:

YOUR SELECTION : 8

HYPO speech selection:

1 English version 2 French version 3 German version

Your selection: 3

German version selected!



5.6 Storing the UV-lamp intensity1. Wait for 10 minutes (after switching on the HCU 20) until the UV-

lamp intensity has stabilised.

2. Choose U Store UV-LAMP value on the HYPO SERVICE-MENU:

YOUR SELECTION : U

Store uv-lamp intensity into the EEPROM (Y/N)?:Y

Store UV-lamp intensity -----------------------

UV-INTENSITY 467

Are You sure to overwrite UV-intensity (Y/N)?: Y

New UV-Intensity stored!

5.7 Storing the UV-lamp limitThe error message UV! is displayed when the UV-lamp intensity isbelow the set limit. The limit can be set between 10 % and 100 % of thestored UV-lamp intensity.

1. Choose S Set UV-LAMP limit on the HYPO SERVICE-MENU:

YOUR SELECTION : S

Store uv-lamp limit into the EEPROM (Y/N)?:Y

Store UV-lamp limit -----------------------

UV-INTENSITY UV-LIMIT UV-SET 467 745 50

Set new UV-SET (in %): 60 60 UV-LIMIT OK? (Y/N):Y

New UV-LIMIT stored!

Heater-Cooler Unit HCU 20 Display and error messages


6. Display and error messages

6.1 Display messages when switching onDisplay 1 Display 2 Display 3 Meaning

1. Lamp test: all display points and all LEDs are lit andthe acoustic alarm beeps.

2. E1.5 HOUR /HEUR /STD.

XXX E1.5: Present software version (E = English).XXX: Operating hours since the last service.

3. OK HYPO OK Self-test concluded without errors.

6.2 Display messagesEnglish French German Meaning

ERR ERR. FEHL Error (continued by a further message), see6.3 Error messages

NOCOM

NONCOMM

KEINKOM.

Lost connection between HCU 20 and remotecontrol.

H2O! H2O! H2O! Water level too low.

KEY! CLAV TAST Invalid button depressed, button depressed forlonger than 15 seconds or Set button depressed forlonger than 3 minutes.

:: :: :: Water mode. Sensor not connected.

TANK TANK TANK Flashing display: The internal mixing-valve isturning to open the cold water circuit. The pumpstops.Steady display: The internal mixing-valve hasopened the cold water circuit. The pump can bestarted again.

UV! UV! UV! UV-lamp out of order.

COMP COMP KOMP Compressor out of order.

SETOFFSET

SETOFFSET

SETOFFSET

See 4.9 Calibrating the minimum water level

SETNIV.25.0

SETNIV.25.0

SETNIV.25.0

See 4.10 Calibrating the maximum water level

Display and error messages Heater-Cooler Unit HCU 20


6.3 Error messages

ER English French German Error source

01 ROM ROM ROM Program memory defect; an incorrect LRC has been found.EPROM defect; access control of the EPROM defect.

02 RAM RAM RAM Data memory test failed. SRAM defect, access control of theSRAM defect, Micro controller defect (internal RAM).

03 EEPROM EEPROM EEPROM EEPROM test failed. EEPROM defect; access control ofEEPROM defect; max. writing cycles of the EEPROM reached.

04 AD-CONV. AD-CONV. AD-CONV. Time out of the processor internal AD-converter. Microcontroller defect.

05 OFFSET OFFSET OFFSET OFFSET test failed. Reference voltage not adjusted; AD-converter defect; AD- input not connected.

06 REFERENC REFERENC REFERENZ Reference voltage test failed. Reference voltage out oftolerance; AD-converter defect, reference voltage not adjusted.

07 + 5VTEST + 5VTEST + 5VTEST +5V supply voltage test failed. +5V supply voltage out oftolerance; AD-converter defect; Reference voltage notadjusted; AD-input not connected; wrong voltage divider.

08 +12VTEST +12VTEST +12VTEST +12V-supply voltage test failed. +12V-supply voltage out oftolerance; reference voltage not adjusted; AD-converter defect;AD-input not connected; wrong voltage divider.

09 12VTEST 12VTEST 12VTEST -12V-supply voltage test failed. -12V-supply voltage out oftolerance; reference voltage not adjusted; AD-converter defect;AD-input not connected; wrong voltage divider.

0A LAMPTEST LAMPTEST LAMPTEST Lamp test failed. Displays defect; the access control of thedisplay is defect.

0C COMP-REL REL-COMP KOMP-REL The compressor relay is defect.

10 S-STOP S-STOP S-STOP Stop input of the safety system. The stop function of theheater relays and pump relays of the safety system are defect.

11 SAFETY-S SECU.SYS SCHUTZ-S Safety system not OK. The lines SS_OK1 and SS_OK2 showan error of the safety system.

13 ILL. ERR ERR ILL. ILL. ERR Illegal error. Illegal software status.

14 KEY !! CLAVIER! TASTE !! Key is jammed. Key is jammed; key pressed during key porttest.

17 FATAL IMPREVU! FATAL Illegal software status. Fatal error!

18 ARITHMET ARITHMET ARITHMET Arithmetic error. Division by 0; fatal error.

19 ILL. ERR ILL. ERR ILL. ERR Illegal error code in error byte. Fatal error!

1A PUMP-REL REL-POMP PUMP-REL Pump relays show faulty state. Pump relays defect

1B HEAT-REL REL-CHAU HEIZ-REL Heater relays show faulty state. Heater relays defect

1C TEMP.-H! TEMP-CH! TEMPHEIZ Heater temperature too high.

1D TEMP.-M! TEMP-MI! TEMPMIX. Mixer temperature too high.

22 CALIBRA. CALIBRA. KALIBRA. During the calibration a value out of the limits is detected.

2F CRC CRC CRC The CRC over the calibration values is not correct.

Heater-Cooler Unit HCU 20 Technical data


7. Technical data

Type designation HCU 20-600 and HCU 20-601 andHCU 20-602 HCU 20-603 (if different)

Temperature controlControl range 3 C to 41 CSetting resolution 0.1 CTemperature accuracy 0.3 CDisplay range of temperatures 0 C to 50 C

Cooling systemMethod Compressor refrigerationCooling media R 134 aCapacity of water tank 33 litresTemperature of cold water 2 C to 3 CInitial cooling capacity 3800 kJ/hContinuous cooling capacity 3000 kJ/h (830 W)Cooling time from 20 C to 10 C ca. 26 minutesCooling time from 20 C to 2 C ca. 50 minutes

Heating systemMethod Electrical heaterCapacity 2250 W (230 V); 1150 W (115 V); 1100 W (100 V)Safety Monitoring against dry-run

CirculationMethod Pressure/suction pump Pressure pumpFlow capacity ca. 10 litres/minute ca. 20 litres/minuteMaximum pressure ca. 0.8 bar ca. 1.5 barFlow regulation StopcocksInlet/outlet connections Coupling MD-012

Power supplyMains 220240 V / 50 Hz; 100115 V / 60 Hz; 100 V / 50 HzMains fuse 20 A thermicPower consumption 3200 W (230 V); 2070 W (115 V); 1800 W (100 V)

OtherMeasurements, LxWxH 410 x 575 x 905 mmWeight (empty) ca. 90 kgWater quality Softened tap water

AccessoriesRemote control cable, 6 metres RCC 20-611Water supply tubing, 6 metres WST 20-700Remote control unit RCU 20-610 (optional)Blanket connection kit BCK 20-710 (optional)Cooling blanket adult CBA 20-730 (optional)Cooling blanket paediatric CBP 20-731 (optional)UV-lamp kit UVL 20-620 (upgrade)

Technical data Heater-Cooler Unit HCU 20


Heater-Cooler Unit HCU 20 Appendix A

Service Manual Art.no. 923651 C.o. J681 A-1

Appendix A

Wiring Diagram

Appendix A Heater-Cooler Unit HCU 20

A-2 Art.no. 923651 C.o. J681 Service Manual

Heater-Cooler Unit HCU 20 Appendix B

Service Manual Art.no. 923651 C.o. J681 B-1

Appendix B

Spare parts listDenomination Article number

220240 V 100115 V, 100 VShut-off valve 530015 530015

Connectors 530004 530004

3-way valve 460011 460011

Splint 681013 681013

Stirrer 914851 914852

UV-lamp 930291 930291

Heater core complete 923621 923622

Pressure/suction pump, 50 Hz 460030 460006

Pressure/suction pump, 60 Hz 460014 460013

Pressure pump, 50 Hz 460017 460018

Pressure pump, 60 Hz 460020 460019

Temperature sensor

Heater/Tank/Mixer

930371 930371

Pressure sensor complete 907321 907321

Fan motor 460004 460008

Circuit-breaker Main 434015 (20 A) 434015 (20A)

Circuit-breaker Heater 434016 (12 A) 434007 (16 A)

Circuit-breaker Compressor 434017 (5 A) 434006 (10 A)

Circuit-breaker

Pressure/suction pump

434002 (1 A) 434008 (2 A)

Circuit breaker Pressure pump 434003 (4 A)

Fuse Power supply board 431010 (800 mA)

Relay contactor 440001 440002

Mini puls pot. 150002 150002

Varistor 150001 150001

Solid state relay 440004 440004

Choke complete 913831 913831

Bellows 922321 922321

Plug 922311 922311

Main switch lamp 420002 420002

Remote control cable 903251 903251

Appendix B Heater-Cooler Unit HCU 20

B-2 Art.no. 923651 C.o. J681 Service Manual

www.jostra.net

Jostra AG

Hechinger Strae 38

72145 Hirrlingen

Germany

Phone: +49 7478 921-0

Fax: +49 7478 921-100

E-mail: [email protected]

Jostra AB

Annedalsvgen 2 B

227 64 Lund

Sweden

Phone: +46 46 33 31 00

Fax: +46 46 33 31 05

E-mail: [email protected]

Jostra (Hong Kong) Ltd.

Beijing Representative Office

Rm. 204, Hui Jing Ge Building

No. 8 Ban Bi Dian Nan Lu Road

Haidian District

Beijing 100089

P.R. of China

Phone: +86 10 6873 0880

Fax: +86 10 6873 1849

Jostra (Hong Kong) Ltd.

Shanghai Representative Office

17 F-B, Bldg. B ,Victoria Plaza

1068 Xi Kang Rd.

Shanghai 200060

P.R. of China

Phone: +86 21 6276 3952

Fax: +86 21 6227 7851

Jostra Japan k.k.

Sasazuka North Odakyu Bldg. 12 F

2-26-2 Sasazuka Shibuya-ku

Tokyo 151-0073

Japan

Phone: +81 3 5333 3601

Fax: +81 3 5333 3609

Jostra Italia S.p.A.

Via Aldo Moro 1/A

43035 Felino (Parma)

Italy

Phone: +39 0521 337267 / 68

Phone & Fax: +39 0521 338626

Jostra France S.A.R.L.

28 30 Avenue Gallieni

94100 Saint Maur des Fosses

France

Phone: +33 1 55 12 35 50

Fax: +33 1 55 12 35 51

Jostra

Sales Office UK & Ireland

Caledonian House

Phoenix Crescent

Strathclyde Business Park

Bellshill ML4 3NJ

Scotland

Phone: +44 1698 849800

Fax: +44 1698 844646

Jostra

Sales Office The Netherlands

Postbus 445

1440 AK Purmerend

The Netherlands

Phone: +31 299 47 39 39

Fax: +31 299 47 41 37

Jostra

Sales Office Norway

Krohnsveien 85 A

5239 Rdal

Norway

Phone: +47 55 13 43 70

Fax: +47 55 13 05 85

Jostra Bentley S.L.

Parque Empresarial San Fernando

Edificio Dublin

28830 Madrid

Spain

Phone: +34 916 781 652

Fax: +34 916 781 652

Jostra Bentley Inc.

P.O. Box 1553

Aasco, 00610-1553

Puerto Rico

Phone: +1 787 826 3131

Fax: +1 787 826 4093

Jostra Bentley Corp.

17511 Armstrong Avenue

Irvine, CA 92614

USA

Phone: +1 800 854 0567

Fax: +1 888 570 4009

ContentsGeneralDescription of functionPatient mode

Front view of the HCU 20Rear view of the HCU 20Front panel of the HCU 20Remote control unit RCU 20-610

Functional descriptionFlowchartFlow outlineInside of the HCU 20Board placement

MaintenanceDailyWeeklyMonthlyChecking the remote control function

Annually

ServiceCompetence of the service engineerDisassembly and replacementsChanging the UV-lampCalibrations and adjustmentsFilling an empty unitDe-airing the internal circulationChecking the minimum temperatureChecking the maximum temperatureCalibrating the minimum water levelCalibrating the maximum water level

Service terminalCalibrating the minimum water levelCalibrating the maximum water levelStoring the temperature sensor calibration valuesChecking the temperature sensor calibration valuesChoice of languageStoring the UV-lamp intensityStoring the UV-lamp limit

Display and error messagesDisplay messages when switching onDisplay messagesError messages

Technical dataAppendix AWiring DiagramAppendix BSpare parts list

hcu20senglish service manual

Documents

j681heatercooler unit

service engineer

remote control unit

jostra abannedalsvgen

service manualthe information

remote control function

description of function

change order