Philips HD3620-20 User Guide

Perfect Draft

HD3620/20

Philips Domestic Appliances and Personal Care

Service Manual

PRODUCT INFORMATION

- This product meets the requirements regarding interference suppression on radio and TV.

- After the product has been repaired, it should function properly and has to meet the safety requirements as officially laid down at this moment.

TECHNICAL INFORMATION

- Power : 70 W

- Power consumption :

- Cool down period average (KEG 23 °C -> 3 °C) : 0.062 kWh

- Standby period (KEG on 3 °C) : 0.042 kWh

- Voltage : 100 - 120 V - 50/60 Hz 200 - 240 V - 50/60 Hz

- Flow rate : 2 L per minute

- Contents Keg : 6 L

- Colour setting : Black/Metal

- SAP coding : HD3620/20

OPTIONAL (accessories)

- No specific issues

Published by Philips Domestic Appliances and Personal Care Printed in the Netherlands © Copyright reserved Subject to modification

07/01

DISASSEMBLY- AND RE-ASSEMBLY ADVISE

HD3620/20

For your safety first be sure the plug is disconnected from the mains!

Removing the back cover:

- To remove the back cover, first remove the 4 screws.

- Open both doors, at the upper/lower right and left side the screws can be found.

* Note: When the Fan became defect also Peltier

element has to be replaced or fully checked on performance. Due to overheating also the Peltier element will be damaged.

Replacing the Peltier element:

- When the Peltier element has to be replaced, first remove the back cover and Fan assy.

- Unscrew the 2 screws located on the heat sink.

- The heat sink including Peltier element can now be removed.

- With a small screwdriver the Peltier element can be removed from the heat sink, some force maybe needed.

- Before placing the new Peltier element, clean the chiller plate and heat sink thoroughly.

- Provide heat sink paste on the heat sink and chiller plate. With a plastic comb (or plastic like a credit card) carefully provide the heat sink paste as equable as possible.

- Place the new Peltier element on the chiller plate at the same position of the removed Peltier element.

Picture 3.

Picture 1.

- When the back cover has been removed all parts can easy be reached.

Replacing the Lever Connector Assembly:

- Remove the screw that you can see on the front.

- Remove the hose from the pump unit.

- Now the lever assembly can be removed from the appliance.

- Reassembling follow above steps in reverse order.

Replacing the Display:

- When the display has to be replaced for some reason, the complete Left door including display and flat cable has to be replaced.

- Remove the back cover.

- Disconnect the flat cable connector from the main PCB that is coming from the right door.

- Unscrew the two screws that are holding the door.

- To re-assembly carry out steps backwards.

Replacing the Fan assy.

- When the Fan has to be replaced, unscrew the 4 posi screws and disconnect the connector of the Fan.

- When re-assemble the fan assy, be sure that the airflow (see arrow on the Fan) is appointing to the heat sink.

Picture 2.

NOTE! It is important to place the Peltier element with

the right side on the chiller plate. (see picture 4 for details)

- In other words, the cooling side of the Peltier has to point to the chillerplate and the warm side has to point to the heat sink.

- Detail to check is the Colour of the wires must be equal positioned see, picture 4 for detail.

- Make sure the Peltier element is well placed.

- Place the heat sink.

- Hold and place the heat sink with force against the Peltier element.

- Tighten the screws alternate, to prevent damaging the Peltier element for mounting lop-sided.

- While screwing wait some seconds so that the heat sink past can be settled between the surfaces.

- Maximum force that maybe applied to tighten the screws are: 0.6 Nm.

Replacing the pump unit:

- Start with disconnecting the air pressure hose and electrical connections.

- Unscrew the 3 screws from the plastic pump bracket.

- To re-assembly carry out steps backwards.

NOTE! To prevent leakage at the connection side of the

hose, cut a small piece off the end of the hose.

Picture 4.

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REPAIR INSTRUCTIONS

Electrical circuit:

- When the appliance does not work, check the electrical circuit.

HD3620/20

Beer outlet

Process block diagram of the appliance

10.5 V

Interface board

Power supply

Mains

(120 V or 230 V)

J12J11

(rear panel)

J14

Pressure

Sensor

PCB

J10

Display PCB (Front panel)

Display

Air

pump

Air inlet

Keg present

Heatsink

Fan

NTC

switch

Peltier

Keg

Beer in

plastic bag

Chillerplate

Keg fill air release

Compressed air

Picture 5.

Working principle of the appliance

- Hereby a short description of the working principle.

- Beer, the Beer is stored in a plastic bag inside the Keg, see picture 5.

- The Beer only comes in contact with the tube connector and never with the appliance.

- When the tap unit and tube connector are connected on the Keg and the Keg is placed in the appliance, the Keg present switch will be activated.

- Once the appliance is activated after approximately 10 seconds you will hear a pump running.

- The task of this pump is to fill the space between the plastic bag and the walls of the Keg with air and create an overpressure (± 1500 mBar).

- Through the over pressure around the plastic bag (comparable like you squeeze into the plastic bag) the Beer will be pressurized (sort of ) as well.

- By pulling the tap handle the tube connector hose will become opened and the Beer will flow out of the plastic bag via the tube connector in to the glass.

- After this cycle the pump will start running to get back in the overpressure situation like described before.

- When the Keg present switch has been actuated also the cooling process (Peltier element) will be started and display functions become visible.

- The temperature is measured by a NTC located near the Keg present plunger.

- The volume indication is based on the principle of a pressure drop measured by the pressure sensor. The speed and value of the pressure drop will be calculated in an algorithm, the outcome will be represented as volume on the display.

- When pouring Beer, the pressure in the KEG will decrease, the amount the pressure decrease in a period of time will be calculated through the system and indicated as volume on the display.

- The volume indication is dived in 9 steps.

- The Beer Freshness indicator is a day counter (24 h) and can be adjusted with the + and − button. (default 30days)

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REPAIR INSTRUCTIONS

HD3620/20

Service testroutines

- This appliance has been equipped with special service routines to be able to check several functions of the appliance.

- Below the necessary steps will be described to enter into the service mode.

- Please follow the instructions carefully to avoid damaging the electronic circuit of the appliance.

Read out the software version of the appliance.

1. Disconnect the appliance from mains.

2. Keep the + button at the display pressed and connect appliance to the mains.

3. Keep the + button pressed and readout the software version (number indicated for example 21 = version

2.1), see example.

4. When the + button is released the appliance returns to the normal state.

Putting the appliance into Display test mode.

1. Disconnect the appliance from mains.

2. Keep the + and − button at the display pressed and connect appliance to the mains.

3. The display test starts. (countdown temperature indication from 20 to 3 then volume bars will be decreased one by one and after that the freshness day counter will be counting down from 30 to 0.

Normal VolDisp

Green segment if TempDisp < 5 °C

Red segment if TempDisp ≥ 5 °C

Normal FreshDisp

4. This process will continue over and over again until the appliance will be unplugged! See examples.

- Above 2 routines can be used to check the software version and working of the Display.

- If internal parts like NTC/Pump, Peltier or FAN must be checked also the service test routines, see further can be carried out.

Putting the appliance into Service test mode.

1. Disconnect the appliance from mains.

2. Remove the KEG (if placed)

3. Keep the KEG present switch pressed and connect the appliance to the mains.

4. When the display comes up release the KEG present switch. (if the KEG present switch will be released within 2 sec after powering up the service mode is entered.

5. If above steps succeeded the appliance will show the current software version.

Stepping through the Service mode.

- Now the service mode is entered it is possible by pressing and releasing the KEG present switch to step through the service routines.

- The list below shows all the possible Service Modes.

- After step mode 10, the routine jumps back to step mode 0.

- Exit the routine by unplugging the appliance.

Note: For step mode 4 - 5 the KEG present switch must kept pressed other wise the Fan will not work!

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