Drager Babytherm 8000 User manual

Repair Instructions for Babytherm 8000

1. Mechanical system

1.1 Trolley

The Babytherm 8000 is available with various trolleys:

- Units with no electrical height adjustment:

o Small base plate for heated cot

o Large base plate for intensive-care model or reanimation unit. This

version permits installation of a radiant heater.

- Units with electrical height adjustment

o Small trolley for heated cot

o Large trolley for intensive-care module or reanimation unit. This

version permits installation of a radiant heater.

1.1.1 Trolley for units without height adjustment

The trolley consists of a trolley plate small or large which is keyed to the metal casing of the column.

This trolley has the following castors:

2 x castor 2M 21 048

2 x locking castor 2M 21 050

The metal ends and the castor attachment points are secured in each case with caps 2M 20 989.

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1.1.1.1 Removal and installation of castors

- Pull off cap 2M 20 989 upwards.

- Jack up trolley at castor to be removed.

- Attention: Units manufactured in 1995 (ARJx-xxxx) may be equipped with castors which are additional secured by a hexagon socket-head screw M6. In this case, remove screw.

- Knock out castor with hammer (approx.

0.2 - 0.5 kg) and pin punch

- Install in reverse order. Make sure that circlip is fitted on pin of castor (part of scope of delivery of castors).

- In the case the castor was secured by a hexagon socket-head screw, this screw must be affixed using Loctite 221 (order no. 79 01 966).

- Fit cap

1.1.2 Trolley for units with height adjustment

There are two possibilities:

- Large trolley 2M 21 036

- Short trolley 2M 21 038

These trolleys have the following height adjustments:

- Height adjustment 230V 2M 20 940

- Height adjustment 230V (extra high) 2M 21 174 (must nor be used on the Heated Cot with the short trolley 2M 21 038)

- Height adjustment 115V 2M 20 946

- Height adjustment 110V (extra high) 2M 21 175

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(must nor be used on the Heated Cot with the short trolley 2M 21 038)

In each case with the control unit:

o Foot pedals, complete 2M 20 290

These trolleys have the following castors:

- 2 x castor 2M 20 792

- 2 x locking castor 2M 20 794

- The castors are held in position 2M 20 348. in each case by the caps

1.1.2.1 Removing and installing castors

The castor pins are held in position in the tubular section by the orange caps 2M 20 348, see Fig. from drawing 2M 21 036. The castors can be pressed out of the tubular section using two screwdrivers.

Important: Do not apply leverage to plastic parts of castors.

Should this not prove possible, cut off orange cap 2M 20 348 at end of tubular section and press out castor pin from inside.

1.1.3 Replacement in repair situation

Replacement parts are available in line with the spare parts list.

1.2 Column with electrical height adjustment

These trolleys feature the following height adjustments:

- Height adjustment 230V 2M 20 940

- Height adjustment 230V (extra high) 2M 21 174 (must nor be used on the Heated Cot with the short trolley 2M 21 038)

- Height adjustment 115V 2M 20 946

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- Height adjustment 110V (extra high) 2M 21 175 (must nor be used on the Heated Cot with the short trolley 2M 21 038)

In each case with the control unit:

o Foot pedals, complete 2M 20 290

1.2.1 Height-adjustment technical data

Height adjustment 230V:

- Dynamic force: 750 N

- Stroke: 295 mm

- Speed: 12 - 15 mm/s

- Voltage: 220 - 240 V / 50/60 Hz

- Current consumption: 2.5A

- Leakage current: < 0.1 mA

- Fuses:

o Temperature switch (self-resetting)

o 2 x fuse DIN 41662 T3.15A 18 15 148

Height adjustment 115V:

- Dynamic force: 750 N

- Stroke: 295 mm

- Speed: 12 - 15 mm/s

- Voltage: 100 - 127 V / 50/60 Hz

- Current consumption: 5 A

- Leakage current: < 0.1 mA

- Fuses:

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o Temperature switch (self-resetting)

o 2 x fuses DIN 41662 T6.3A 18 15 172

1.2.2 Foot pedals, complete 2M 20 290

The height adjustment is controlled by the foot pedal assembly 2M 20 290.

- Foot pedals, complete 2M 20 290

- Connection diagram 2M 20 370

- Wiring harness 2M 20 213

1.2.3 Replacement in repair situation

Replacement parts are available in line with the spare parts list.

1.3 Base plate for resting surface and accessory rails

The resting surface is attached to the base plate. The Babytherm 8000 comes with various base plates:

- Small base plate and small trolley for heated cot

o Base plate, small (with handles 2M 20 860) 2M 21 148

- Large base plate and large trolley for intensive-care module or reanimation unit. This version permits installation of a radiant heater.

o Base plate, large (with handles 2M 20 862) 2M 21 146

Caution: Large base plate is never to be installed on small trolley!

1.3.1 Replacement in repair situation

Replacement parts are available in line with the spare list.

1.4 Socket strip

Caution: The 3x earthing-contact socket strip beneath the base plate of the resting surface is only intended for:

- Babytherm mattress heating

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- Dräger radiant heater RH 600 (not in the USA and Canada)

- Babytherm height adjustment

Other loads are not permitted!

Important: The radiant heater envisaged at the factory is provided with an inlet connector for non-heating appliances. The appropriate connecting cable is pulled through the rail on the back.

Important: Retrofitted loads are not to be connected to the socket strip as otherwise the data on the rating plate will no longer be correct!

Electrical safety is tested by way of the common power cord.

1.4.1 Replacement in repair situation

Replacement parts are available in line with the spare parts list.

1.4.2 Repair information and modification statuses

1.4.2.1 Alteration of class type B to BF (12.94)

The future Standard for mattress heating IEC 601-2-35 (as at 12.94) prescribes that the resting surface is no longer to be earthed and that class type BF (Body Floating) must be used. The units are currently being supplied as type B (Body) i.e. with earthed resting surface. Production of the Babytherm 8000 with mattress heating is to be switched as of the start of 1995 to class type Typ BF; prior to this date roughly 300 units will be delivered with the old class type B.

Subsequent alteration from type B to BF is not envisaged.

Power cord for mattress heating control: This refers to the short internal mains lead 2M 21 220 between the triple socket in the Babytherm and the mattress heating control.

Type B Type BF

Ferrite 18 34 967 required on cable No longer ferrite on cable. If already

fitted, ferrite need not be removed

Important: A summary of class alteration from type B to BF is given in Section 9.3. Consult this Section in the event of doubt.

1.5 Resting surface

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1.5.1 General information

The resting-surface assembly consists of the following:

- Resting surface

- Bottom-section tilt mechanism, bolted to base plate

- Mechanical system of tilt mechanism

- 4 corners for holding glass panels

Various side panels can be attached to the resting surface:

- Tall side panels for heated cot or

- Deep side panels for reanimation unit

The resting surface comes with (heated cot) and without (reanimation unit) mattress heating:

With mattress heating:

- Gel mattress 2M 20 827

The mattress heating panel is only intended for the gel mattress 2M 20 827!

Danger:

The gel mattress 2M 20 827 may only be used in the Babytherm 8000 in conjunction with the resting-surface heater!

The gel mattress 2M 20 827 is not to be used in the Babytherm 4200 and in other heated cots with a heating-panel temperature in excess of 40 °C ⇒ danger of burns!

Keep sharp objects away from gel mattress ⇒ danger of damage!

Without mattress heating:

- Foam mattress 2M 21 012

- Babytherm 8000 dummy panel 2M 21 067

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(for electronics opening)

- 4 Dummy plugs 14.3 mm 83 02 977

- 2 Dummy plugs 38 mm 2M 21 341

1.5.2 Testing and adjusting resting-surface tilt mechanism

1.5.2.1 Function

The bottom section of the resting-surface tilt mechanism is connected to the base plate with 4 hexagon socket-head bolts. This section contains the resting surface with support being provided on one side by rollers and on the other side by teflon strips as anti-friction bearings. The resting surface is fixed by way of a gear mechanism in the bottom section and the latch for the mechanical system of the resting-surface tilt mechanism.

Pulling the lever A presses the latch B downwards out of the gear mechanism C and the resting surface D can be swivelled out of its basic position by +15° to -20°. The lever is pulled back again in each case by two springs and the resting surface thus fixed in position.

1.5.2.1 Checking function in situ

- Presence of and check on the two return springs 83 00 445

⇒ The spring force must be sufficient to reliably return the lever to its

initial position

- Pull out lever A approximately half way (20 mm):

⇒ Resting surface remains fixed in every position

- Pull out lever A to 3/4 of overall distance (30 mm):

⇒ Resting surface can be silently adjusted

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Important: Refer to 1.5.2.2 if resting surface is released too soon or not soon

enough or if it does not reliably engage in every position.

1.5.2.2 Testing and adjustment following removal

- Remove complete resting surface. To do so interrupt mains connection to electronics assembly or remove the electronics module and screw out the four hexagon socket-head bolts H.

- Visually inspect gear mechanism C in resting-surface section; there must not be any signs of wear.

- Visually inspect gear mechanism B of latch 2M 20 855 of mechanical system of resting-surface tilt mechanism. To do so un screw out bolts E and F. There must not be any signs of wear. Reattach latch. Important: The bolts E and F are secured with epoxy hardening glue (UHU Plus).

- Visually inspect tilt mechanism: All moveable parts must be greased with Molykote 55M order no.15 54 093.

- The 4 teflon sliders must not be greased.

- Presence of and check on the two return springs 83 00 445

⇒ Spring force must be sufficient to reliably return lever to initial

position.

- Pull out lever A approximately half way (20 mm):

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⇒ Resting surface remains fixed in every position.

- Pull out lever A 3/4 of the total distance (30 mm):

⇒ Resting surface can be silently adjusted

- The disengaging/engaging travel of the latch can be adjusted by way of the screw G at the latch:

o Resting surface is released too early:

Loosen the screw G a few turns. Unscrew the bolts E and F and apply epoxy hardening glue (UHU Plus, order no. 11 95 255) on their threads. Screw in the bolts E and F and re-tighten them. Repeat the test.

o Resting surface is not released too late or is not released properly:

Remove the bolts E and F and screw-in the screw G a few turns. Apply epoxy hardening glue (UHU Plus, order no. 11 95 255) on the threads of the bolts E and F. Screw in the bolts E and F and retighten them. Repeat the test.

- Reattach resting surface

- Electrical safety check

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1.5.3 Corners and side panels

1.5.3.1 Testing

The corners and side panels must be checked for reliable closure. If this is not the case or if there are visible signs of wear, the panel hinges or housing corners are to be renewed.

1.5.3.1 Removing and installing corners

Knock corners upwards with plastic hammer. Installation involves reverse procedure.

1.5.3.2 Side-panel hinges

The hinges of the side panels can be renewed; this requires use of the following spare parts:

- S-set for hinge, left 2M 21 084

- S-set for hinge, right 2M 21 082

A 2 mm bit and a drill are needed for assembly.

1.5.4 Replacement in repair situation

Replacement parts are available in line with the spare parts list.

1.5.5 Testing after replacement

- Check reliable locking of panels

- Visually inspect correct installation of all parts

- Check resting-surface tilt mechanism (see 1.5.2.1)

- If heating or electronics assembly has been removed:

o Electrical safety check

o Functional check (Test time at least 20 minutes)

• Heating function

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• Mains failure alarm

• Data storage with mains failure alarm

• Function of keys

• Function of display elements

• No error messages

1.5.6 Repair information and modification statuses

1.5.6.1 Mounting the mechanics of the resting-surface (9.94) tilt-mechanism

With immediate effect, the mechanics of the resting-surface tilt-mechanism must be mounted with 4 Spax screws (order no. 12 75 593). Devices already in service must be retrofitted with this type of screws, see IDM no. 1 and conversion instructions under "U", Chapter 2.1. The two cylinder head screws of the latch 2M 20 855 and the screw on the control lever must be secured with epoxy hardening glue (UHU-Plus, order no. 11 95 255).

1.6 Accessories

1.6.1 Cabinet

- Cabinet mount, complete 2M 20 868

- Swivel cabinet 2M 20 638

1.6.2 Rail for resting-surface

- Modification kit rail 2M 21 468

2. Pneumatic system

2.1 Extraction

The extraction is not part of this documentation.

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3. Heating panel with sensors

3.1 General information

The heating panel consists of an aluminium backing plate (6 mm) to which a heating foil 24V / 120W is bonded and two twin temperature sensors are bolted.

Transformer

Partition of prim./ sec. voltage

HHT Gel Mattress

Aluminium plate 6mm

Heating foil

Temp. Sensors(2x2 NTCs)

Control unit

Power cord

To distinguish between type B and BF the mattress heating control and heating panel have different plugs for the heating connection:

Type B (old) - 3-pin connector for heating cable,

one cable for protective conductor

Type BF (new) - 2-pin connector for heating cable

As not all parts of the mattress heating are interchangeable, the modified components have new order numbers. Always pay attention to repair information when performing repairs.

The heating panel is only intended for the gel mattress 2M 20 827

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Danger:

The gel mattress 2M 20 827 may only be used in the Babytherm 8000 in conjunction with the resting-surface heater!

The gel mattress 2M 20 827 is not to be used in the Babytherm 4200 and in other heated cots with a heating-panel temperature in excess of 40 °C ⇒ danger of burns!

Keep sharp objects away from the gel mattress ⇒ danger of damage!

3.2 Heating-panel assembly

The heating panel consists of the following components:

- Backing plate 2M 20 878

- All-round seal for backing plate 2M 20 882

- Foil heating 24V/120W bonded on for type BF 2M 21 509

- Twin temperature sensor 2M 20 859

The sensors are fitted with thermal conduction paste at the backing-plate contact surfaces.

The heating panel is secured in position in the cot from underneath with four bolts.

The heating panels for types B and BF have different order numbers.

The following heating-panel parts differ:

Heating panel 2M 20 877 for type B Heating panel 2M 21 510 for type BF

Double temp. sensor 2M 20 859 with shield connected to sensors. Identification: No yellow and blue shrink-down tubing at sensors. Sensor cannot be converted to type BF.

Foil heating 2M 20 876 with 3-pin connector:

- 2 x heating

- Protective conductor

Double temp. sensor 2M 20 859 with insulated shield on sensor end, distinguished by sensors with blue and yellow shrink-down tubing. This sensor can also be used in type B. Alteration has already been made on some units of type B. Foil heating 2M 21 509 with 2-pin connector:

- 2 x heating

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Important: In future only the new heating panel 2M 21 510 will be available. The new heating panel 2M 21 510 for type BF will then have to be converted to type B in the event of repair. This will involve taking over the protective-conductor cable connection and 3-pin heating connector from the defective heating panel 2M 20 877. In this case the protective conductor connection is to be laid separately from the heating cables. To remove the connector, use can be made of the tool "Extractor for crimp socket 2.6 mm" with the order no. 79 01 120; another possibility is to make use of ballpoint-pen refills (with metal tube) with a tube ID of approx. 2.6 mm.

3.2.1 Heating and sensor connections

- Heating for type B:

Pin Color Significance

1 not yellow/green Heating 2 not yellow/green Heating 3 yellow/green Protective conductor

- Heating for type BF:

2 x Heating

- Twin temperature sensor (2 x 2 sensors):

Refer also to drawing, wiring harness, twin temperature sensor 2M 20 875 under "S".

Pin Color Significance Temperature module

1 blue Sensor 1, first half Module 1 2 red Sensor 1, first half Module 1 6 black Sensor 2, first half Module 2 7 white Sensor 2, first half Module 2 4 blue Sensor 1, second half Module 3 5 red Sensor 1, second half Module 3 9 black Sensor 2, second half Module 4 10 white Sensor 2, second half Module 4

There is no preferential position for the two halves on the backing plate.

assignment on controller PCB

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3.3 Testing

Refer to 3.5

If there is any doupt as to the accuracy of the temperature on the resting surface perform the following test at a room temperature of 20 to 30 °C:

- Adjust setpoint to 36.0 °C

- Place the point of the fluid temperature probe of the temperature and

humidity set 79 01 148 on the centerof the heating plate such that the point touches the plate.

- Cover the plate with the gel mattress 2M 20 827

- Cover the gel mattress with the foam mattress 2M 21 102

- If possible cocer the resting surface with the hood 2M 21 030

- Allow the unit to warm up at least 2 hours

- Important: Do not use any additional radiant heater!

- Test value of the reference temperature instrument:

Reading = 36,0 ± 1,0 °C

3.4 Replacement in repair situation

The following spare parts are available for repairs:

For type B:

- Heating-panel assembly 2M 20 877

o Twin temperature sensor 2M 20 859

o Backing-plate seal 2M 20 882

For type BF:

- Heating-panel assembly 2M 21 510

o Twin temperature sensor 2M 20 859

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o Backing-plate seal 2M 20 882

The following heating-panel parts differ:

Heating panel 2M 20 877 for type B Heating panel 2M 21 510 for type BF

Double temp. sensor 2M 20 859 with shield connected to sensors. Identification: No yellow and blue shrink-down tubing at sensors. Sensor cannot be converted to type BF.

Foil heating 2M 20 876 with 3-pin connector:

- 2 x heating

- Protective conductor

- 2 x heating

3.5 Testing after replacement

Assemble unit ready for operation.

- Visual inspection:

o Correct installation of heating panel and seal

o Proper connection of heating to electronics assembly

o Correct installation of electronics assembly

- Functional check (Test duration at least 30 minutes):

o Adjust setpoint to 37.0 °C.

o If setpoint higher than actual value:

⇒ Heating LED flashes

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o Adjust setpoint to 38.0 °C.

o Interrupt mains connection:

⇒ Visual and acoustic mains failure alarm

o Re-establish mains connection:

⇒ Unit continues to operate with setpoint of 38 °C

- Testing in DS mode, see 6.2 if actual value greater than 37 °C:

o Read out all four temperature values in each case in DS mode 6.2.1 -

6.2.4; the permitted deviation between the minimum and maximum temperature value is 0.4 °C. Important: The displayed value in DS mode is 1.0 °C higher than the value normally displayed in operation.

- Electrical safety check

3.6 Repair information and modification statuses

3.6.1 Alteration of class type B to BF (12.94)

Subsequent alteration from type B to BF is not envisaged.

The difference can be seen from the stamp next to the rating plate of the Babytherm:

Type B: Type BF:

(Figure with no box) (Figure in box)

To distinguish between type B and BF the mattress heating control and heating panel have different plugs for the heating connection:

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Type B (old) - 3-pin connector for heating cable,

one cable for protective conductor

Type BF (new) - 2-pin connector for heating cable

As not all parts of the mattress heating are interchangeable, the modified components have new order numbers. Always pay attention to repair information when performing repairs.

The heating panels for types B and BF have different order numbers.

The following heating-panel parts differ:

Heating panel 2M 20 877 for type B Heating panel 2M 21 510 for type BF

Double temp. sensor 2M 20 859 with shield connected to sensors. Identification: No yellow and blue shrink-down tubing at sensors. Sensor cannot be converted to type BF.

of type B. Foil heating 2M 20 876 with 3-pin connector:

- 2 x heating

Foil heating 2M 21 509 with 2-pin

connector:

- 2 x heating

- Protective conductor

Important: A summary of class alteration from type B to BF is given in Section 9.3. Consult this Section in the event of doubt.

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4. Mattress heating electronics

4.1 Removal and installation of electronics and components

4.1.1 Removing and installing electronics assembly

Important: Components can be effected by static electricity!

- Interrupt mains connection to Babytherm

1. (2x)

- 1. Swing up the two side catches on the electronics assembly

- 2. Pull electronics assembly slightly out of Babytherm

- 3. Detach mains connection

- 4. Detach sensor and heating connecting cable

- 5. Pull out electronics assembly

- Install in reverse order

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4.1.2 Opening electronics assembly

Important: Components can be effected by static electricity!

- Loosen both screws in the cover of the electronics assembly (do not screw out); push cover forwards and remove upwards.

- Detach cable connections from connectors in cover to printed circuit cards.

- Bend housing apart on side (1.) and tilt keypad with display PCB forwards (2.).

Transformer

PCB Power

PCB Controller

Keyboard

- Install in reverse order.

PCB Display

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4.1.3 Wiring diagram

V2 V11

Connection heating

R22

Relay

Fuses

F2 F1

Connection protective conductorr PCB Power + PCB Controller

Connection Sensors

RS232

PCB Power

Test points

PCB Controller

EPROM

4 Service-LEDs

Gold Cap

Horn

Mains input with fuses

Transformer

Keyboard

PCB Display

Switch

Important: 100 - 127 V units feature a voltage adapter from the accessory set: voltage conversion 2M 21 176 between mains switch and transformer.

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4.1.4 Display PCB, keypad and mains switch

Important: Components can be effected by static electricity!

- Remove electronics assembly (see 4.1.1)

- Open electronics assembly (see 4.1.2)

- Detach cable connections to keypad and display PCB (see 4.1.3 wiring diagram)

- Display PCB is attached to keypad with three nuts

- Mains switch with wiring harness is attached to keypad

- Perform installation in reverse order

4.1.5 Power PCB and controller PCB

Important: Components can be effected by static electricity!

- Remove electronics assembly (see 4.1.1)

- Open electronics assembly (see 4.1.2)

- Detach cable connections to keypad and display PCB, (see 4.1.3 wiring diagram)

- Power PCB is attached with three snap fasteners and a screw connection (at the heat sink) whereas controller PCB is secured in position with four snap fasteners.

o Loosen screw connection for power PCB

o Squeeze snap fastener 1

together and raise printed circuit card 2; snap fastener engages again on installation.

o Important: There are two

replacement snap fasteners at the dividing wall in the electronics assembly.

o Removal of the controller PCB may involve removal of the snap

fasteners for the power PCB. To do so, squeeze snap fasteners

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together at bottom with pointed pliers and press out fasteners upwards.

- Install in reverse order

4.1.6 Mains input with mains fuses

4.1.6.1 Mains fuses

- Remove electronics assembly (see 4.1.1)

- Pull out fuse compartment next to mains socket.

- Following fuse ratings must be used:

o 220/240V units:

2 x fuse DIN 41662, T800mA 18 15 075

o 100/127V units:

2 x fuse DIN 41662, T1.6A 18 15 105

- Slide fuse compartment back in again

- Re-install electronics assembly

4.1.6.2 Removing and installing mains input

Important: Components can be effected by static electricity!

- Remove electronics assembly (see 4.1.1)

- Open electronics assembly (see 4.1.2)

- Detach cable connections at mains input (see 4.1.3 wiring diagram)

- Mains input is attached to housing with two screw connections

- Install in reverse order

4.1.7 Transformer, adapter for mains voltage conversion 100 - 127 V

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Important: Components can be effected by static electricity!

- Remove electronics assembly (see 4.1.1)

- Open electronics assembly (see 4.1.2)

- Detach cable connections to transformer (see 4.1.3 wiring diagram)

- 100 - 127 V units feature the voltage adapter 83 06 462 from the accessory set for voltage conversion 2M 21 176 between mains switch and mains input of transformer.

- Transformer is attached to housing with four screw connections

- Install in reverse order

4.2 Electronics, complete

4.2.1 General information

The electronics module contains the entire control system for the mattress heating. The module is made up of the following components:

- Controller PCB

- Power PCB

- Display PCB

- Mains switch

- Transformer

- Keypad

- Mains input

- Adapter for voltage conversion (100/127 V units only)

The repair information for these individual components is given in sections 4.3 -

4.9

4.2.2 Voltage conversion

As the heating is driven via the transformer, the mains voltage is no problem to convert.

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The following is required for conversion from 220/240V to 100/127V:

- Accessory set, voltage 100/127V 2M 21 176

Important: It is not possible to change the voltage for the optional height adjustment!

4.2.3 Testing electronics, complete

Assemble unit ready for operation, but do not fix electronics assembly in position in housing. Connector for attaching sensor cable to unit is therefore accessible.

Switch on unit:

- All displays and horn are actuated for 1.2 s

- Then:

o Setpoint display = 37.0 °C

o Measured value and label "SEt" flash up alternately on actual value

display. Important: measuring range 5 °C - 45 °C.

o Pressing one of the keys " ⇑ " or " ⇓ " setpoint produces constant

actual display.

- Without prior pressing of range expansion key setpoint can be adjusted to between 35.0 °C and 37.0 °C.

- After prior pressing of range expansion key setpoint can be adjusted in each case to min 30.0 °C or max. 38.5 °C.

- Adjust setpoint to 37.0 °C.

- Press "check" key:

o All displays and horn are actuated for 2 s.

o All displays and horn then off for 2 s.

o This is followed by return to original display.

- If setpoint higher than actual value:

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o Heating LED flashes

- If actual value is in range between 35.5 °C and 38.0 °C, adjust setpoint in each case to 1.1 °C higher or lower than actual value:

o Visual and acoustic alarm ± 1 °C

o Acoustic alarm can be suppressed with "horn off" key

- Adjust setpoint to 38.0 °C.

- Interrupt mains connection:

o Visual and acoustic mains failure alarm

- Re-establish mains connection:

o Unit continues to operate with setpoint of 38 °C

- Disconnect plug from sensor cable at assembly:

o Visual and acoustic sensor alarm

- Reconnect plug

- Testing in DS mode, see 6.2, if actual value greater than 37 °C:

o Read out all four temperature values in each case in DS mode 6.2.1 -

6.2.4. The permitted deviation between the minimum and maximum temperature value is 0.4 °C. Note: The value displayed in DS mode is 1.0 °C higher than the value normally displayed in operation.

- Instead of sensors, connect up Babytherm 8000 test plug (35 °C + 1 °C Offset) 79 00 965.

- Testing in DS mode, see 6.1:

o Read out all four temperature values in each case in DS mode. Test

value is always 35.0 ± 0.2 °C.

- Switch off unit and assemble ready for operation.

- Electrical safety check.

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4.2.4 Replacement in repair situation

If a defective assembly cannot be repaired by replacing individual components, the following spare parts are available:

For Type B:

- Electronics assembly 220/240V, complete 2M 20 880

o Conversion set 100/127V 2M 21 176

- Repair/replacement electronics assembly 2M 21 095 220/240V, complete

For Type BF:

- Electronics assembly 220/240V, complete 2M 21 500

o Conversion set 100/127V 2M 21 176

- Repair/replacement electronics assembly 2M 21 506 220/240V, complete

Important: The control system 2M 20 880 and the RAT (repair/replacement) control system 2M 21 095 for type B will no longer be available in future.

Type BF controls are to be ordered as spare part for the old type B. On installation, merely the housing cover with the two wiring harnesses (heating adapter and sensor adapter) is to be taken over from the defective control system. The marking on the housing of the new control system is to be changed to type B and the order no. from 2M 21 500 to 2M 20 880.

4.2.5 Testing after replacement

The following tests are to be performed after replacement of the electronics assembly:

- Visual checks:

o Correct mains voltage set in electronics assembly (see 4.2.3).

- Electrical safety check

- Functional test (Test duration at least 20 minutes)

o Function of heating

6132.200 Babytherm 8000 Repair Instructions 04.01 Page 30 of 115

+ 85 hidden pages

Drager Babytherm 8000 User manual

Table of contents:

1. Mechanical system

1.1 Trolley

1.1.1 Trolley for units without height adjustment

1.1.1.1 Removal and installation of castors

1.1.2 Trolley for units with height adjustment

1.1.3 Replacement in repair situation

1.2 Column with electrical height adjustment

1.2.1 Height-adjustment technical data

1.2.2 Foot pedals, complete 2M 20 290

1.2.3 Replacement in repair situation

1.3 Base plate for resting surface and accessory rails

1.3.1 Replacement in repair situation

1.4 Socket strip

1.4.1 Replacement in repair situation

1.4.2 Repair information and modification statuses

1.4.2.1 Alteration of class type B to BF (12.94)

1.5.1 General information

- Resting surface

1.5.2 Testing and adjusting resting-surface tilt mechanism

1.5.2.1 Function

1.5.2.1 Checking function in situ

1.5.2.2 Testing and adjustment following removal

1.5.3 Corners and side panels

1.5.3.1 Testing

1.5.3.1 Removing and installing corners

1.5.3.2 Side-panel hinges

1.5.4 Replacement in repair situation

1.5.5 Testing after replacement

1.5.6 Repair information and modification statuses

1.5.6.1 Mounting the mechanics of the resting-surface (9.94) tilt-mechanism

1.6 Accessories

1.6.1 Cabinet

1.6.2 Rail for resting-surface

2. Pneumatic system

2.1 Extraction

3. Heating panel with sensors

3.1 General information

3.2 Heating-panel assembly

3.2.1 Heating and sensor connections

3.3 Testing

3.4 Replacement in repair situation

3.5 Testing after replacement

3.6 Repair information and modification statuses

3.6.1 Alteration of class type B to BF (12.94)

4. Mattress heating electronics

4.1 Removal and installation of electronics and components

4.1.1 Removing and installing electronics assembly

4.1.2 Opening electronics assembly

4.1.3 Wiring diagram

4.1.4 Display PCB, keypad and mains switch

4.1.5 Power PCB and controller PCB

4.1.6 Mains input with mains fuses

4.1.6.1 Mains fuses

4.1.6.2 Removing and installing mains input

4.1.7 Transformer, adapter for mains voltage conversion 100 - 127 V

4.2 Electronics, complete

4.2.1 General information

4.2.2 Voltage conversion

4.2.3 Testing electronics, complete

4.2.4 Replacement in repair situation

4.2.5 Testing after replacement