Memmert IPP200 User manual

SERVICE MANUAL
IPP 200-500
Cooled incubator with Peltier technology
HPP 108
Constant Climate Chamber with humidification

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Service IPP 200-500/HPP 108 | 10/2008
Contents
1. About this guide 4
1.1 Purpose and target group 4
1.2 Related documents 4
1.3 Tools needed 4
1.4 Manufacturer address and
customer service 4
2. Safety regulations 5
3. Finding Errors and
Error Messages 6
4. Overview 8
4.1 Construction 8
4.2 Control unit 10
5. Removing covers 11
5.1 Removing top panel 11
5.2 R emoving the rear panel 12
6. Mainboard 13
6.1 Check switching function of
mainboard 13
6.2 Replace fuses 14
6.3 Replace mainboard 14
7. Replacing the switched mode
power supply 15
8. R eplace main switch module with
the push/turn control 16
9. Replace controller 17
10. Replace Pt100 temperature
sensor 18
11. Replacing the chamber fan 19
12. Removing the fan from the
rear panel 21
13. Replacing a Peltier
cooling/heating module 23
14. Adjusting and removing
inner door 25
14.1 Adjusting inner door 25
14.2 Removing the inner door 25
15. Installing, removing and
adjusting door 26
15.1 Removing the door 26
15.2 Installing the door 26
15.3 Adjusting the door 27
15.4 Removing and installing
the door lock 28
16. Replacing seals 30
16.1 Replacing door seal 30
16.2 Replacing the chamber
seal and the cage seal 30
17. Replacing the interface module 32
18. H umidification and/or
dehumidification does
not work properly 33
18.1 H umidification is not
working properly 33
18.1.1 Replac steam generator 35
18.1.2 Replacing the pump 36
18.2 Dehumidification is not
working properly 36
18.2.1 Replace fan and dehumidi-
fication Peltier module 37
18.2.2 Replace the dehumidi-
fication power supply unit 38
18.3 R eplace control module 39
18.4 Replacing the humidity sensor 40
19. C ircuit diagrams 42
19.1 Legend 42
19.2 IPP 200/300/400 43
19.3 IPP 500 44
19.4 HPP 108 45

4Service IPP 200-500/HPP 108 | 10/2008
About this guide1.
Purpose and target group1.1
This guide describes the service and repair work available for
cooling incubators of types IPP 200–500 and constant climate
chambers of type HPP 108. It is intended exclusively for use by
electrical technicians who are familiar with safety regulations for
electrical engineering.
Related documents1.2
Apart from this service guide, the information and regulations in
the user manual for the respective appliance must also be ob-
served for all service and repair work.
Please refer to the circuit diagrams at the end of this guide for all
work on the electrical system.
Tools needed1.3
The following tools and equipment are required to perform the
work described in this guide:
Torx screwdriver sizes 8 and 10 ►
Phillips screwdriver size 1 ►
Wire-cutting pliers ►
Flat pliers to remove the connection cable ►
Allen key 2 mm for door hinge, ►
1.5 mm for humidity sensor (for HPP 108)
Multimeter with voltage and resistance measuring range ►
Cable ties ►
Adhesive tape to label cables and components ►
Manufacturer address and customer service 1.4
MEMMERT GmbH + Co. KG
Postfach 17 20
91107 Schwabach, Germany
Äußere Rittersbacherstr. 38
91126 Schwabach
Germany
Phone: [phone] / 925-0
Fax: [phone] / 14585
E-mail: [email protected]
Internet: www.memmert.com
Customer Service:
Phone: [phone]
and: [phone]/925-126
E-mail: [email protected]
For service enquiries, please always specify the appliance number
on the nameplate.
© 2008 Memmert GmbH + Co. KG
Date 10/2008
We reserve the right to make changes

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Service IPP 200-500/HPP 108 | 10/2008
Safety regulations2.
Danger!
After removing covers, voltage-carrying parts
may be exposed if the mains plug has not
been disconnected. Any work that involves
opening the appliance may only be performed
by trained electricians who are familiar with
the safety regulations for electrical engineer-
ing.
Caution!
When dismantling the appliance you could be
injured on sharp (unprocessed) metal edges.
You should wear gloves.
Please also observe the safety regulations in
the operating instructions for the respective
appliance.
After all maintenance or repair work, the appliance must be sub-
ject to a function test. The appliance must not be left unattended
until it has reached the steady state.
If the fault or malfunction cannot be rectified by the repair work:
Contact the manufacturer.

6Service IPP 200-500/HPP 108 | 10/2008
Finding Errors and Error Messages3.
Error description Cause of error Rectifying errors Page
General faults
Controller display does
not light up
Fuse 100 mA
(200 mA/115 V) faulty
Check fuse, replace if
necessary
14
Appliance fuse 15 A faulty Check fuse, replace if
necessary
14
Mainboard faulty Replace mainboard 13
Temperature cannot be
adjusted and
appliance can in general
not be operated with the
push/turn control
Appliance "locked" by UserID card Undo lock with UserID card
Push/turn control faulty Replace main switch module
with push/turn control
16
Cooling fan on rear wall
does not turn
- cooling fan faulty
- switched mode power supply faulty
- replace cooling fan
- replace switched mode
power supply
21
15
Cooling fan in interior
does not turn
- cooling fan faulty
- switched mode power supply faulty
- replace cooling fan
- replace switched mode
power supply
19
15
Malfunctions in the heating and cooling function
Red LED on the
mainboard does not light
up
- switched mode power supply faulty
- contact element MOSFET faulty
replace switched mode
power supply
15
When changing from
heating to cooling,
the red LED on the
mainboard does not go
out
- switched mode power supply faulty
- contact element MOSFET faulty
replace switched mode
power supply
15
When switching from
heating to cooling, the
relay does not switch over
Relay faulty Replace mainboard 13
Green LED on the
mainboard does not light
up
- switched mode power supply faulty
- contact element MOSFET faulty
replace switched mode
power supply
15
Error messages in monitoring display
Caution – icon
is flashing
Monitoring controller has switched
off heater, since temperature
difference between operating and
monitoring controller is too small
Increase temperature
difference between
monitoring temperature and
working temperature.
Replace Pt100 temperature
sensor of monitoring
controller if necessary
18

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Service IPP 200-500/HPP 108 | 10/2008
Error description Cause of error Rectifying errors Page
Error message "E-3"
alternates with display of
temperature
Pt100 temperature sensor of
monitoring controller faulty.
Monitoring controller is working
in emergency mode with the
temperature value of the Pt100
temperature sensor from the
operating controller
Replace Pt100 temperature
sensor of the monitoring
controller on plug J3
18
Error messages in timer display
Error message "E-0" Serious configuration error
(e.g. incorrect cabinet type or wrong
temperature range)
Replace controller 17
Error message "CONF" (is
displayed for only 10 sec.
after switching on)
Checksum error (error when saving
set values, e.g. air turbine speed)
The error can be rectified
by the controller after a set
value parameter has been
saved again. If the error
should continue occurring,
or cannot be rectified,
replace the controller 17
Error message "E-L1" in
the timer display
Communication with the mainboard
interrupted
Check connection cable,
replace mainboard if
necessary
13
Error messages in temperature display
Error message "E-3"
alternates with display of
monitor
Pt100 temperature sensor of
operating controller faulty. Operating
controller is working in emergency
mode with the temperature value of
the Pt100 temperature sensor from
the monitoring controller
Replace Pt100 temperature
sensor of the operating
controller on plug J4
18
Error message "E-1" Mainboard actuator Triac faulty Replace mainboard 13
Error message "E-2" Mainboard faulty Replace mainboard 13
Malfunctions of the humidifier and/or dehumidifier (only for the constant climate chambers HPP 108)
Neither humidification nor dehumidification are working properly 33
Dehumidification works, humidification doesn't work 33
Humidification works, dehumidification doesn't work 36

8Service IPP 200-500/HPP 108 | 10/2008
O4. verview
Construction4.1
12
3
4
5
6
7
8
9
10
11
Construction (shown in figure: Maximum fittings for HPP 108; the actual fittings may vary, depending Fig. 1:
on the appliance type)

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Service IPP 200-500/HPP 108 | 10/2008
Item Designation see also page
1 Top panel 11
2 Rear panel 12
3 Right-side panel 11
4 Door 26
5 Inner glass door 25
6 Fan cover, right119
7 Fan cover, left119
8 Left-side panel 11
9 Cover of left Peltier heating/cooling module121
10 Cover of dehumidification Peltier module237
11 Cover of right-hand Peltier heating/cooling module121
1 only for types IPP 500 and HPP 108; types IPP 200 -400 have just one interior fan and one Peltier heating/
cooling module on the rear side
2 only for constant climate chambers HPP 108

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4.2 Control unit
(see also circuit diagrams from page 42).
The control unit can be reached after the top panel has been removed (see page 11).
1234567
Control unit IPP 200/300/400Fig. 2:
2345789710
Control unit IPP 500/HPP 108Fig. 3:
Main connection terminal1
Mainboard (see page 13)2
Controller (see page 17)3
Chipcard reader4
Main switch (see page 16)5
Feed-through for temperature sensor Pt100 (see page 18)6
Switched mode power supply(ies) (see page 15)7
Only for HPP 108:
Pump for humidification (see page 36)8
Control module for humidification (page 39)9
Power supply unit for humidification (page 38) 10

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Service IPP 200-500/HPP 108 | 10/2008
Removing covers5.
For some service work it is necessary to remove case panels (top,
side, rear panels). How these panels are removed is described
below. What panel(s) need(s) to be removed for the respective
service work is described in the relevant chapter.
Removing top panel5.1
Danger!
After removing the top panel, voltage-carrying
parts in the control unit may be exposed if the
mains plug has not been disconnected. Do not
reach inside the control unit. If you want to examine or
replace the components inside, disconnect the mains
plug first.
Undo the 4 screws to the left and right on the rear side of 1.
the appliance holding down the top panel (1).
Slightly raise the panel and pull it out backwards (2).2.
1
2
3
Removing the top and side panelsFig. 4:
You can now also remove the left and/or right side panel. They
are not screwed down, and can simply be pulled out by pulling
upwards (3). Make sure when doing this that they do not jam,
and disconnect the PE conductor connection.
Insert side panels carefully from above into the guide rails and
push downwards until they slot into place. Make sure that the
side panels do not jam when doing this. Reconnect the PE con-
ductor.
Put on the top panel and push forwards into the support. Insert
the screws with retaining washers into the openings in the rear
panel and screw down the top panel (1).
The retaining washers are necessary to create a safe PE conductor
connection with the top panel.
Removing the
side panels
Put the covers
back on

12 Service IPP 200-500/HPP 108 | 10/2008
R5.2 emoving the rear panel
1. Disconnect the mains plug.
2. Remove the top panel (see page 11).
3. Unscrew the cover grid of the Peltier module (IPP 200–400)
or of the two Peltier modules (IPP 500/HPP 108) on the rear
side (1).
In addition for the constant climate chamber HPP 108: Un-
screw the cover grid of the dehumidification Peltier module
and of the steam generator in the centre (2).
4. Pull rear panel upwards out of the appliance (3). Make sure
that the rear panel does not jam when doing this.
3
1
1
2
Removing the rear panelFig. 5:
Unscrew the cover grid of the Peltier module/s1
Unscrew the cover grid of the dehumidification Peltier module and of the 2
steam generator (only for the HPP 108).
Pull out the rear panel of the casing upwards3
1. Insert the rear panel carefully from above into the guide rails
and push downwards until it slots into place. Make sure that
the rear panel does not bend when doing this.
2. Screw on the grid covers of the Peltier modules on the right
and left (1).
In addition for the constant climate chambers HPP 108:
Screw on the cover grid of the dehumidification Peltier mod-
ule and of the steam generator in the centre (2).
Put the rear panel
back on

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Service IPP 200-500/HPP 108 | 10/2008
6. Mainboard
12
3
4
5
6
7
8
Mainboard (see also control unit overview on page 10)Fig. 6:
Heat up LED (red)/cool down LED (green)1
S 30 (fan)2
Screw3
Spacer bolt4
S 28 (controller/display)5
Appliance fuse6
Fuse for controller/display7
Main connection terminal power supply8
Check switching function of mainboard6.1
Remove the top panel to do this (see page 11).
The actual status of the actuator can be checked via the red and
green LED (1) on the mainboard:
red LED: heating ►
green LED: cooling ►
Note:
The heating and cooling icon in the display shows only the cur-
rent controller actuating variable and not the actual status of the
MOSFET actuator.
In order to protect the Peltier element from the demands made
by sudden changes in temperature, every change in performance
takes place smoothly, i.e. a sudden change in the set value from
heating to cooling causes a slow and smooth polarity reversal of
the Peltier element.

14 Service IPP 200-500/HPP 108 | 10/2008
Replace fuses6.2
The fuses for controller/display and appliance protection are lo-
cated on the mainboard (see page13).
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Measure the fuse resistance with a continuity tester. If the 3.
fuse is in order the resistance should only be a few Ohms.
To replace the fuse, push an insulated flat screwdriver be-4.
neath the side of the fuse and lever it out of the mounting
bracket. Press the new fuse into the mounting bracket from
above.
Appliance fuse: 15 A quick-blow 32 x 6.3 mm ►
(American)
Fuse for controller/display: 100 mA slow-blowing ►
20 x 5 mm
200 mA slow-blowing
20 x 5 mm (115V)
Spare part Variants Spare part number
Appliance fuse 15 A E02387
Fuse for controller/display 100 mA/230 V E02497
200 mA/115 V E01007
Replace mainboard6.3
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Pull off all cables from the mainboard. Label unmarked cables 3.
with adhesive tape to avoid confusion when reconnecting.
Undo 4 screws from the mainboard. Make sure that the 4.
spacer bolts are not lost when doing this.
Remove the mainboard.5.
Insert a new mainboard and screw it tight with the spacer 6.
bolts.
Reconnect the cable.7.
Put the top panel back on; plug in the mains plug.8.
Check that the appliance is working. If the fault persists: Con-9.
tact the manufacturer.
Spare part Variants Spare part number
Mainboard 230 V B04098
115 V B04113

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Service IPP 200-500/HPP 108 | 10/2008
7. Replacing the switched mode power supply
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Disconnect all the plugs on the switched mode power supply 3.
and label them if necessary (1).
Undo the screws (4 screws) at the corners (2) and remove the 4.
switched mode power supply.
Insert a new switched mode power supply and screw tight.5.
Reconnect the plug to the switched mode power supply.6.
Re-attach the top panel.7.
Connect the mains plug and subject the appliance to a func-8.
tion test. If the fault should persist or if it works incorrectly,
contact the manufacturer.
2
2
1
Switched mode power supplyFig. 7:
Connections1
Screws2
Spare part Spare part number
Switched mode power supply E04016

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R8. eplace main switch module with the push/turn
control
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Pull off the push/turn control (1) forwards.3.
Remove the plugs (4-pin) (4) from the controller slot J2.4.
Undo the mounting bolts on left and right (2).5.
Slightly raise the main switch module and pull backwards.6.
Place new main switch module into the control panel.7.
Attach the module with two screws (2).8.
Connect the plug (4) to the controller slot J2.9.
Attach the push/turn control (1) at the front.10.
Put the top panel back on; connect the mains plug.11.
Switch on appliance and check the function of the new main 12.
switch module and the push/turn control. If the error has not
been rectified: Contact the manufacturer.
1
4
3
2
Main switch module (see also control unit overview on page 10)Fig. 8:
Push/turn control1
Mounting bolts (left and right)2
Main switch3
Plug (controller slot J2)4
Spare part Variants Spare part number
Main switch module 230 V B04425

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Service IPP 200-500/HPP 108 | 10/2008
Replace controller9.
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Pull off the push/turn control to the front (see page 16). 3.
Undo three screws (3) and remove the main switch module 4.
(4).
Cut and remove both cable ties (2) with wire-cutting pliers.5.
Pull off and label the plugs of the respective controller slots 6.
(Jx).
Remove controller (1) to the rear.7.
Insert new controller and fasten controller and main switch 8.
module with three screws (3).
Reconnect plug to the respective controller slots.9.
Push the push/turn control back on.10.
Put the top panel back on; connect the mains plug.11.
Subject the appliance to a function test. If it should still work 12.
incorrectly, contact the manufacturer.
1
3343 2J2 J9 J8
2
J13 J4 J3 J11
Replace controller (see also control unit overview on page 10)Fig. 9:
Spare part Variants Spare part number
Controller RS 232 IPP 200/300/400 B04279
IPP 500/HPP 108 B04281
Controller RS 485 IPP 200/300/400 B04280
IPP 500/HPP 108 B04282

18 Service IPP 200-500/HPP 108 | 10/2008
Replace Pt100 temperature sensor10.
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Push the temperature sensor on the ceiling of the chamber 3.
(1,2) carefully to the rear and out of the clamp (3) and thread
upwards through the feed-through in the control unit floor
(4).
In the control unit, pull off the plug of the sensor from the 4.
controller (see also page 17):
Sensor for operating controller: 4-pin controller slot J4
Sensor for monitoring controller: 4-pin controller slot J3
Cut through cable tie with wire-cutting pliers and remove 5.
Pt100 sensor with cables.
Thread in new sensor downwards from the control unit into 6.
the climate chamber.
Carefully push sensor into the clamp. Make sure that it is 7.
properly mounted. Insert the sensor in the clamp so that it is
straight.
In the control unit, connect the cable of the sensor on the 8.
controller (see also page 17):
Sensor for operating controller: 4-pin controller slot J4
Sensor for monitoring controller: 4-pin controller slot J3
Put the top panel back on, connect the mains plug.9.
Subject the appliance to a function test. If the fault should 10.
persist/if it works incorrectly, contact the manufacturer.
5
4
3
1,2
1
2
Replace temperature sensor (see also control unit overview on page 10)Fig. 10:
Temperature sensor for operating controller1
Temperature sensor for monitoring sensor2
Clamp3
Feed-through through the control unit floor/chamber ceiling4
Cable connection to the controller in the control unit5
Spare part Spare part number
Pt100 temperature sensor E04822

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Service IPP 200-500/HPP 108 | 10/2008
Replacing the chamber fan11.
Disconnect the mains plug.1.
Remove the top panel (see page 11).2.
Undo the screws of the fan cover (1); remove the fan cover 3.
(2).
Remove the plug connector of the chamber fan from the 4.
switched-mode power supply (see page 10).
Undo the screws of the chamber fan (3).5.
Remove the chamber fan (4) from the heat sink of the Peltier 6.
module (5).
Place a new fan on the heat sink of the Peltier module and 7.
screw it in.
Connect the plug connector of the fan to the switched-mode 8.
power supply in the control unit.
Position the fan cover and screw it down.9.
Re-attach the top panel.10.
Reconnect the mains plug. Subject the appliance to a func-11.
tion test. If the fault should persist or if it works incorrectly,
contact the manufacturer.
1
2
3
4
5
Replacing the chamber fanFig. 11:
Screws for the fan cover1
Fan cover2
Screws for the fan3
Chamber fan4
Heat sink for the Peltier module5

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Spare part Variants Spare part number
Chamber fan IP54 all B04004
Fan cover
IPP 200/300 E03995
IPP 400 E03994
IPP 500 E04656
HPP 108 left E05401
right E05402