Heater-Cooler Unit HCU 20
Service Manual
Heater-Cooler Unit HCU 20
Service Manual
The information in this document may change without notice. Names and data used in examples are fictitious unless otherwise noted. No part of this document may be reproduced, transmitted or transcribed, in any form or by any means, without the prior written permission of Jostra AB. © Copyright 1998 Jostra AB. All rights reserved. Jostra AB Annedalsvägen 2 B 227 64 Lund, SWEDEN Phone: +46 46-33 31 00 Fax: +46 46-33 31 05 Article number: 923651 Change order: J681
Heater-Cooler Unit HCU 20
Contents
Contents 1. General ................................................................................................. 5 1.1 Description of function ................................................................... 5 1.1.1 Patient mode............................................................................ 5 1.2 Front view of the HCU 20 .............................................................. 6 1.3 Rear view of the HCU 20 ............................................................... 7 1.4 Front panel of the HCU 20 ............................................................. 8 1.5 Remote control unit RCU 20-610................................................... 9 2. Functional description ...................................................................... 10 2.1 Flowchart ...................................................................................... 10 2.2 Flow outline .................................................................................. 11 2.3 Inside of the HCU 20.................................................................... 12 2.4 Board placement ........................................................................... 13 3. Maintenance....................................................................................... 14 3.1 Daily ............................................................................................. 14 3.2 Weekly .......................................................................................... 14 3.3 Monthly......................................................................................... 14 3.3.1 Checking the remote control function................................... 15 3.4 Annually ....................................................................................... 15 4. Service................................................................................................. 16 4.1 Competence of the service engineer ............................................. 16 4.2 Disassembly and replacements ..................................................... 17 4.3 Changing the UV-lamp................................................................. 18 4.4 Calibrations and adjustments........................................................ 19 4.5 Filling an empty unit..................................................................... 19 4.6 De-airing the internal circulation.................................................. 19 4.7 Checking the minimum temperature............................................. 20 4.8 Checking the maximum temperature............................................ 20 4.9 Calibrating the minimum water level ........................................... 20 4.10 Calibrating the maximum water level......................................... 20 5. Service terminal ................................................................................. 21 5.1 Calibrating the minimum water level ........................................... 23 5.2 Calibrating the maximum water level........................................... 23 5.3 Storing the temperature sensor calibration values........................ 24 5.4 Checking the temperature sensor calibration values .................... 25 5.5 Choice of language ....................................................................... 25 5.6 Storing the UV-lamp intensity...................................................... 26 5.7 Storing the UV-lamp limit ............................................................ 26 6. Display and error messages .............................................................. 27 6.1 Display messages when switching on........................................... 27 6.2 Display messages.......................................................................... 27 6.3 Error messages.............................................................................. 28 7. Technical data.................................................................................... 29
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Contents
Heater-Cooler Unit HCU 20 Appendix A...........................................................................................A-1 Electrical diagrams and drawings .....................................................A-1 Appendix B ...........................................................................................B-1 Spare parts list...................................................................................B-1
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Service Manual
Heater-Cooler Unit HCU 20
General
1. General 1.1 Description of function The Jostra Heater-Cooler Unit HCU 20 supplies temperature-controlled water for blood heat exchangers in extracorporeal circulation and for blankets with which patients can be warmed or cooled. The water temperature is adjustable from 3° C to 41° C. A 33 litre tank of ca. 3° C cold water assures quick cooling of the patient. Two external water circuits can be attached, each with their own waterflow adjustment system (but with a common temperature control). A safety system monitors the regulation in order to prevent the temperature from rising above 42° C. The HCU 20-602 and the HCU 20-603 have a UV-lamp in the water tank to prevent the growth of algae, fungus, mould, bacteria and other microbes. The HCU 20-600 and the HCU 20-601 are prepared for a UV-lamp. The differences between the HCU 20-600 and the HCU 20-602 versus the HCU 20-601 and the HCU 20-603 are the circulation method, the flow capacity and the maximum pressure (see “7. Technical data”). The HCU 20 is supplied with the remote control cable RCC 20-611 and the water supply tubing WST 20-700. The remote control unit RCU 20-610 is optional. Use an independent power supply, protected by a 20 A automatic thermic fuse.
NOTE
WARNING The radiation from the UV-lamp in the water tank is instantly injurious to the eye. Never look down the funnel of the water tank. Keep the lid on whenever possible. Never risk exposure during disassembly.
1.1.1 Patient mode To prevent a too abrubt heating or cooling, the water temperature is only allowed to deviate from the temperature of the patient by certain values, gradients, in “patient mode”. This provides a more physiologically optimised heating and/or cooling than the direct setting of the water temperature.
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General
Heater-Cooler Unit HCU 20
1.2 Front view of the HCU 20 Fuses Press the screws and turn them ¼ turn counter-clockwise to open the lid over the automatic fuses.
1 2 3 4 5 6 7 8
Normal fuse positions
9
Compressor: pressed in
10
Pump:
pressed in
11
Heater:
to the right
12 13
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
6
Keep the lid of the fuse box closed during normal operation.
Art.no. 923651 C.o. J681
Service Manual
Heater-Cooler Unit HCU 20
General
1.3 Rear view of the HCU 20
1 2 3 4 5 6 7 8
1. 2. 3. 4. 5. 6. 7. 8.
Service Manual
Funnel for the water tank Mains cable holder Socket for remote control and service terminal Automatic fuse for the mains circuit Connection for potential equalization Type label Mains cable Drain cock for the water tank
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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 button Lit when circulating.
5. Local/remote button Lit when remote control is on.
6. Adjustment knob Hold down the “Set Temp.” button and turn the adjustment knob to set a temperature.
7. Audio off button Flashes when the present acoustic alarm is switched off. The acoustic alarm returns with every new alarm condition.
8. Cooling LED Lit when cooling the water.
9. Heating LED Lit when warming the water.
10. Tank temperature button Press to see the temperature in the cold water tank in the middle display. Press together with the “Set temp.” button for three seconds to see the water level in the middle display. 11. Set temperature button (2.9° C to 41° C) Hold down this button and turn the adjustment knob to set a temperature. Press together with the “Audio off” button to alter the brightness of the displays in three grades
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Service Manual
Heater-Cooler Unit HCU 20
General
1.5 Remote control unit RCU 20-610 Connect the remote control cable RCC 20-611 to the remote control socket at the rear side of the HCU 20. Connect the other end to the socket at the underside of the remote control unit.
1
2
1. Temperature sensor socket (for the YSI 400 series manufactured by Yellow Springs or other compatible sensor) 2. Remote control cable socket (9-pin DSUB)
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Functional description
Heater-Cooler Unit HCU 20
2. Functional description 2.1 Flowchart The outlet water is taken from the water tank or the heater (or both) depending on the position of the motor valve. T: Temperature sensor for measuring and control (and to prevent overheating if the system is accidentally operated without water) P: Pressure sensor to measure the water level
33 litres
Manual control valves
Heat exchanger
Flowchart: HCU 20-600 with pressure and suction pump
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Service Manual
Heater-Cooler Unit HCU 20
Functional description
2.2 Flow outline
Flow outline: HCU 20-600 with pressure and suction pump
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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
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Service Manual
Heater-Cooler Unit HCU 20
Functional description
2.4 Board placement Open the front panel to reach the control board and the power supply board. Remove the stainless cover to reach the control board.
Control board
Power supply board
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Maintenance
Heater-Cooler Unit HCU 20
3. Maintenance WARNING The radiation from the UV-lamp in the water tank is instantly injurious 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 etch the copper cooling spirals and the heater core.
1, 4 2, 5 3
3.1 Daily 1. 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 from walls or cupboards.
3.2 Weekly 3. 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.
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Service Manual
Heater-Cooler Unit HCU 20
Maintenance
3.3.1 Checking the remote control function Press the “local/remote” button on the HCU 20 for three seconds, when it is connected to the HL 20 or the RCU 20-610, to enter the remote control mode. The “local/remote” button should light up and an acoustic signal sound.
3.4 Annually A complete service by a service engineer is recommended, including calibration of the minimum and the maximum water levels and the components, check of the minimum and the maximum temperatures and change of the UV-lamp.
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Service
Heater-Cooler Unit HCU 20
4. Service WARNING Refrigeration circuit repairs (except the condenser fan) must be performed by Jostra service personnel. Recharging and replacements may be subcontracted to a competent refrigeration organisation. The HCU 20 must never be laid on its side. If accidentally put in another position, it must stand upright for at least 24 hours before operation.
4.1 Competence of the service engineer The service should be performed by a qualified service engineer to assure that the unit is maintained satisfactory. Qualification requires: • • •
16
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.
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Service Manual
Heater-Cooler Unit HCU 20
Service
4.2 Disassembly and replacements WARNING The radiation from the UV-lamp in the water tank is instantly injurious to the eye. Disconnect the power supply before disassembly. The temperature sensors may only be changed by Jostra authorized personnel.
Top panel Front panel Valve panel Stopcocks Lower panel
NOTE
The top panel is held by four screws. In the rear end of the top panel there is a rubber tube which goes down to the water tank. When the top panel is removed the tube is pulled out of the tank. The front panel can be opened after the removal of the top panel and the two screws above the stopcocks. It is mounted on hinges in the top end. The lower panel is held by three screws in the upper end and three nuts in the lower end. The valve panel can be lifted up and pulled out after the removal of the front panel and the lower panel.
Empty the water tank and connect tubes to the outlets and open the stopcocks to release the pressure before removing any components in the water circuit. To remove the motor valve first unscrew the mounting plate to get access to the valve fastening screws.
Mounting plate Tank temperature sensor
Mixing valve
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Service
Heater-Cooler Unit HCU 20
4.3 Changing the UV-lamp NOTE
Replace the UV-lamp annually.
WARNING The radiation from the UV-lamp in the water tank is instantly injurious to the eye. Disconnect the power supply before disassembly.
B D A
C
1. Disconnect the power supply and remove the top panel. 2. Loosen the cord squeezing screws and unscrew the lamp cord end of the connection box (A). Pull out the contents and loosen the connection 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 the tank with a flashlight and check that the “UV-INT” value changes (on the “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 the tank (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-lamp intensity”. 10. Store the UV-lamp limit (if the old value should be changed), see “5.7 Storing the UV-lamp limit”.
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Service Manual
Heater-Cooler Unit HCU 20
Service
4.4 Calibrations and adjustments To calibrate components and to adjust the temperature controller (e.g. after a replacement), contact Jostra service.
4.5 Filling an empty unit Fill a completely empty unit as follows, to avoid an airlock in the pump. 1. Prepare a length of tubing with a Walther type male ½" quick connector at one end and a connector suitable for your soft water supply at the other. 2. Connect the tubing between one outlet of the unit and the soft water supply. 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 the middle display. 4. Open the outlet stopcock of the unit and turn on the water supply. Fill to a level of 33 litres. 5. Turn off the water supply and close the outlet stopcock. Remove the tubing from the water supply. 6. Press the “Tank Temp.” button to leave the “level mode”. If the water tank is over-filled or if a maximum filled unit is moved the superfluous water is released through the overflow opening (above the left front wheel).
NOTE
4.6 De-airing the internal circulation 1. Prepare a short transparent tubing with a Walther type male ½" 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 the adjustment knob to set the temperature to 2.9° C (“tank mode”). Wait till the display message “TANK” stops flashing. 4. Press the circulation button. Circulate until no bubbles can be seen in the tubing and the water pump runs with an even, gentle sound. The internal circulation is now free of air.
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Service
Heater-Cooler Unit HCU 20
4.7 Checking the minimum temperature 1. 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 the water). 2. Connect the heat exchanger and the blanket. 3. Place the probe of an accurate temperature recorder in the tubing near the outlet. 4. Set the temperature to 2.9° C (“tank mode”) and wait until the display message “TANK” stops flashing. Start the circulation. 5. When the middle display shows that the outlet water has reached the set temperature, wait one minute and check that the temperature recorder shows a stable temperature that corresponds to the set temperature.
4.8 Checking the maximum temperature Follow the steps in “4.4 Check the minimum temperature”, but set the temperature to the maximum 41° C instead. It is not necessary to wait until the water in the tank is cooled down.
4.9 Calibrating the minimum water level 1. 2. 3. 4.
Empty the tank. Set the temperature to 5.9° C. Switch off the unit and back on again. During the initial self-test at switch on, press the “Set Temp.”, “local/remote” and “Audio off” buttons simultaneously until the three displays show “SET OFF SET”. 5. Press the “Set Temp.” and the “local/remote” buttons simultaneously to store the current water level as zero.
4.10 Calibrating the maximum water level 1. 2. 3. 4.
Fill up the tank to the maximum. Set the temperature to 5.9° C. Switch off the unit and back on again. During the initial self-test at switch on, press the “Tank Temp.”, “local/remote” and “Audio off” buttons simultaneously until the three displays show “SET NIV 25.0”. 5. Turn the adjustment knob until the patient temperature display shows “33.4”. 6. Press the “Set Temp.” and the “local/remote” buttons simultaneously to store the water level.
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Service Manual
Heater-Cooler Unit HCU 20
Service terminal
5. Service terminal In this section, text on the service terminal is written in the type-face Courier 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 engineer with the competence described in “4.1 Competence of the service engineer”. 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 20 according to the interface characteristics. 2. “Cold-start” the HCU 20 and wait until the terminal has completed the “JNS HYPO II” page. 3. Press to enter the “HYPO SERVICE-MENU”.
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Service terminal
Heater-Cooler Unit HCU 20
HYPO SERVICE-MENU HYPO SERVICE-MENU: -------------------------1 2 3 4 5 6 7 8 T U S
Initialise EEPROM on controller board Reset hour meter on controller board ZERO water level Calibrate water level Init. Temp. SENSOR calibration values SET Temp. SENSOR calibration values Check Temp. SENSOR calibration values Select speech Activate test output Store UV-LAMP value Set UV-LAMP limit
Q
QUIT YOUR SELECTION :
WARNING Never select option “1”. The EEPROM may only be initialised by Jostra service in some exceptional cases. Never select option “2”. The hour meter may only be reset by Jostra service. It should not be necessary to use option “5”. If the temperature sensor calibration values are initialised, there will be temperature deviations until all accurate values have been restored. Wrongly set values on the service terminal could be hazardous to the patient. NOTE
Option “T” displays a record of test values. These are normally useful just 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.
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Heater-Cooler Unit HCU 20
Service terminal
5.1 Calibrating the minimum water level This can also be done without a service terminal, see “4.9 Calibrating the minimum 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 level This can also be done without a service terminal, see “4.10 Calibrating the maximum water level”. 1. Fill up the tank to the maximum. 2. Choose “4 Calibrating water level” on the “HYPO SERVICEMENU”: YOUR SELECTION : 4 Calibrate water level Y / N ? Y CALIBRATE WATER-LEVEL ----------------------LITER
(25.0
...
35.0):
33.4
PASSED
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Service terminal
Heater-Cooler Unit HCU 20
5.3 Storing the temperature sensor calibration values WARNING The temperature sensor calibration values may only be stored by Jostra authorized personnel. A label with the serial number and the calibration values is attached to the cable of the sensor. For an accurate temperature control, these values must be entered like in the example below. (Just press “Enter” to keep an old value.) 1. Choose “6 SET Temp. SENSOR calibration values” on the “HYPO SERVICE-MENU”: YOUR SELECTION : 6 STORE NEW CAL-values into serial EEPROM! serial number
R-0øC
R-50øC
HEATER CONTROL SENSOR: INIT C-HEA HC: 61831 HC: 61831
100.000 100.232 100.232
119.400 119.640 119.640
values OK (Y/N)?:Y
HEATER SAFETY
SENSOR: INIT S-HEA HS: 61831 HS: 61831
100.000 100.124 100.124
119.400 119.518 119.518
values OK (Y/N)?:Y
CONTROL SENSOR: INIT C-MIX MC: 61832 MC: 61832
100.000 100.181 100.181
119.400 119.576 119.576
values OK (Y/N)?:Y
SAFETY
SENSOR: INIT S-MIX MS: 61832 MS: 61832
100.000 100.121 100.121
119.400 119.509 119.509
values OK (Y/N)?:Y
COLD-W CONTROL SENSOR: INIT C-COL WC: 61834 WC: 61834
100.000 100.094 100.094
119.400 119.491 119.491
values OK (Y/N)?:Y
COLD-W SAFETY
100.000 100.157 100.157
119.400 119.557 119.557
values OK (Y/N)?:Y
MIXER
MIXER
SENSOR: INIT S-COL WS: 61834 WS: 61834
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
61834
100.157
119.557
SENSOR: WS:
values OK (Y/N)?:Y New CAL-values stored!
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Service Manual
Heater-Cooler Unit HCU 20
Service terminal
5.4 Checking the temperature sensor calibration values 1. Choose “7 Check Temp. SENSOR calibration values” on the “HYPO SERVICE-MENU”: YOUR SELECTION : 7 serial number HEATER CONTROL SENSOR: HC: 61831
R-0øC 100.232
R-50øC 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
61834
100.157
119.557
CAL-FAC CRC
SENSOR: WS: OK!
5.5 Choice of language 1. Choose “8 Select speech” on the “HYPO SERVICE-MENU”: YOUR SELECTION : 8 HYPO speech selection: 1 2 3
English version French version German version
Your selection: 3 German
version selected!
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Service terminal
Heater-Cooler Unit HCU 20
5.6 Storing the UV-lamp intensity 1. Wait for 10 minutes (after switching on the HCU 20) until the UVlamp intensity has stabilised. 2. Choose “U Store UV-LAMP value” on the “HYPO SERVICEMENU”: 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 limit The error message “UV!” is displayed when the UV-lamp intensity is below the set limit. The limit can be set between 10 % and 100 % of the stored UV-lamp intensity. 1. Choose “S Set UV-LAMP limit” on the “HYPO SERVICEMENU”: YOUR SELECTION : S Store uv-lamp limit into the EEPROM (Y/N)?:Y Store UV-lamp limit ----------------------UV-INTENSITY 467
UV-LIMIT 745
UV-SET 50
Set new UV-SET (in %): 60 60 UV-LIMIT OK? (Y/N):Y New UV-LIMIT stored!
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Heater-Cooler Unit HCU 20
Display and error messages
6. Display and error messages 6.1 Display messages when switching on Display 1 Display 2 Display 3 Meaning 1.
Lamp test: all display points and all LEDs are lit and the 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 messages English
French
German
Meaning
ERR
ERR.
FEHL
Error (continued by a further message), see “6.3 Error messages”
NO COM
NON COMM
KEIN KOM.
Lost connection between HCU 20 and remote control.
H2O!
H2O!
H2O!
Water level too low.
KEY!
CLAV
TAST
Invalid button depressed, button depressed for longer than 15 seconds or “Set” button depressed for longer than 3 minutes.
–::–
–::–
–::–
“Water mode”.
––––
––––
––––
Sensor not connected.
TANK
TANK
TANK
Flashing display: The internal mixing-valve is turning to open the cold water circuit. The pump stops. Steady display: The internal mixing-valve has opened the cold water circuit. The pump can be started again.
UV!
UV!
UV!
UV-lamp out of order.
COMP
COMP
KOMP
Compressor out of order.
SET OFF SET
SET OFF SET
SET OFF SET
See “4.9 Calibrating the minimum water level”
SET NIV. 25.0
SET NIV. 25.0
SET NIV. 25.0
See “4.10 Calibrating the maximum water level”
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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 the SRAM defect, Micro controller defect (internal RAM).
03
EEPROM
EEPROM
EEPROM
EEPROM test failed. EEPROM defect; access control of EEPROM defect; max. writing cycles of the EEPROM reached.
04
AD-CONV.
AD-CONV.
AD-CONV.
Time out of the processor internal AD-converter. Micro controller defect.
05
OFFSET
OFFSET
OFFSET
OFFSET test failed. Reference voltage not adjusted; ADconverter defect; AD- input not connected.
06
REFERENC
REFERENC
REFERENZ
Reference voltage test failed. Reference voltage out of tolerance; AD-converter defect, reference voltage not adjusted.
07
+ 5VTEST
+ 5VTEST
+ 5VTEST
+5V supply voltage test failed. +5V supply voltage out of tolerance; AD-converter defect; Reference voltage not adjusted; AD-input not connected; wrong voltage divider.
08
+12VTEST
+12VTEST
+12VTEST
+12V-supply voltage test failed. +12V-supply voltage out of tolerance; 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 of tolerance; 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 the display 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 the heater 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 show an 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 port test.
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.
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Heater-Cooler Unit HCU 20
Technical data
7. Technical data Type designation
HCU 20-600 and HCU 20-602
HCU 20-601 and HCU 20-603 (if different)
Temperature control Control range Setting resolution Temperature accuracy Display range of temperatures
3° C to 41° C 0.1° C ±0.3° C 0° C to 50° C
Cooling system Method Cooling media Capacity of water tank Temperature of cold water Initial cooling capacity Continuous cooling capacity Cooling time from 20° C to 10° C Cooling time from 20° C to 2° C
Compressor refrigeration R 134 a 33 litres 2° C to 3° C 3800 kJ/h 3000 kJ/h (830 W) ca. 26 minutes ca. 50 minutes
Heating system Method Capacity Safety
Electrical heater 2250 W (230 V); 1150 W (115 V); 1100 W (100 V) Monitoring against dry-run
Circulation Method Flow capacity Maximum pressure Flow regulation Inlet/outlet connections
Pressure/suction pump ca. 10 litres/minute ca. 0.8 bar Stopcocks Coupling MD-012
Power supply Mains Mains fuse Power consumption
220–240 V / 50 Hz; 100–115 V / 60 Hz; 100 V / 50 Hz 20 A thermic 3200 W (230 V); 2070 W (115 V); 1800 W (100 V)
Other Measurements, LxWxH Weight (empty) Water quality
410 x 575 x 905 mm ca. 90 kg Softened tap water
Accessories Remote control cable, 6 metres Water supply tubing, 6 metres Remote control unit Blanket connection kit Cooling blanket adult Cooling blanket paediatric UV-lamp kit
RCC 20-611 WST 20-700 RCU 20-610 (optional) BCK 20-710 (optional) CBA 20-730 (optional) CBP 20-731 (optional) UVL 20-620 (upgrade)
Service Manual
Art.no. 923651 C.o. J681
Pressure pump ca. 20 litres/minute ca. 1.5 bar
29
Technical data
30
Heater-Cooler Unit HCU 20
Art.no. 923651 C.o. J681
Service Manual
Heater-Cooler Unit HCU 20
Appendix A
Appendix A Wiring Diagram
Service Manual
Art.no. 923651 C.o. J681
A-1
Appendix A
A-2
Heater-Cooler Unit HCU 20
Art.no. 923651 C.o. J681
Service Manual
Heater-Cooler Unit HCU 20
Appendix B
Appendix B Spare parts list Denomination Shut-off valve Connectors 3-way valve Splint Stirrer UV-lamp Heater core complete Pressure/suction pump, 50 Hz Pressure/suction pump, 60 Hz Pressure pump, 50 Hz Pressure pump, 60 Hz Temperature sensor – Heater/Tank/Mixer Pressure sensor complete Fan motor Circuit-breaker – Main Circuit-breaker – Heater Circuit-breaker – Compressor Circuit-breaker – Pressure/suction pump Circuit breaker – Pressure pump Fuse – Power supply board Relay contactor Mini puls pot. Varistor Solid state relay Choke complete Bellows Plug Main switch lamp Remote control cable
Service Manual
Article number 220–240 V
100–115 V, 100 V
530015 530004 460011 681013 914851 930291 923621 460030 460014 460017 460020 930371
530015 530004 460011 681013 914852 930291 923622 460006 460013 460018 460019 930371
907321 460004 434015 (20 A) 434016 (12 A) 434017 (5 A) 434002 (1 A)
907321 460008 434015 (20A) 434007 (16 A) 434006 (10 A) 434008 (2 A)
434003 (4 A) 440001 150002 150001 440004 913831 922321 922311 420002 903251
Art.no. 923651 C.o. J681
431010 (800 mA) 440002 150002 150001 440004 913831 922321 922311 420002 903251
B-1
Appendix B
B-2
Heater-Cooler Unit HCU 20
Art.no. 923651 C.o. J681
Service Manual
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