Procedure For Checking Cool Down Peformance Peltier Element - Philips Perfect Draft HD3620/20 Service Manual

REPAIR INSTRUCTIONS
Stepmode Test
(Press & release
KEG switch)
6 Peltier medium
8 Peltier high
9 Pump test
10 Freshness indicator
and + & − button test
Procedure for checking cool down performance Peltier element.
- To ensure the Cool performance of the Peltier element is according specification the below test procedure have to be carried out.
Preparations:
1. Switch the appliance off and let it stabilize until it reached room temperature.
2. Remove under the base in the middle the rubber cap.
3. Remove the isolation foam under the removed cap, until the chiller plate becomes visible.
- Perform the temperature measurement, when the unit has reached the room/environment temperature.
1. Place a contact temperature probe against the chiller plate were the cap was removed.
2. Block the air inlet coupling at the Keg side, see picture 6 for location.
Picture 6.
3. Plug the appliance in the wall socket and bridge over the Keg present mechanically or electrically so the appliance will start.
4. When the appliance has started the pump will run shortly (in case the air inlet has been blocked properly)
5. Readout the temperature meter and note it down.
6. Keep the appliance switched on for 2 minutes, readout the temperature again.
7. If the temperature has decreased more then 6 °C, between the two measurements the cooling performance is OK, if not
please check again or replace peltier or Fan assy.
Final:
- When the appliance is checked and OK, fill the hole under the cap again with foam or other isolation material and place the cap
back under the base.
Stimulus Response
1. Peltier starts cooling.
2. Display Off.
1. Peltier starts cooling.
2. Display Off.
1. Pump starts.
2. Display Off.
With the + & −
buttons in the
display the Freshness
day counter can be
changed.
(30 – 1)
30
HD3620/20
Remark
Peltier runs on medium level (~50%)
Voltage across Peltier:
~6.0 Vdc / ~4.0 Vrms
Current through Peltier:
~4 A rms
Peltier runs on high level (100%)
Voltage across Peltier:
~10.5 Vdc / ~0.0 V rms
Current through Peltier:
>4.7A rms (lower=defect Peltier)
6-13