Philips Perfect Draft HD3620/20 Service Manual page 8

REPAIR INSTRUCTIONS
Problem
4 Cooling problems.
5 Temperature display
reading cannot be
trust.
6 Beer leakage.
7 Condensation water
leakage.
8 Beer volume
indication.
Cause
Check if the user conditions were carried out
according the DFU.
Possible root causes:
1. Peltier element became defect.
2. NTC sensor became polluted or defective.
3. Fan, heat sink is full of dust.
4. Fan became defect.
System check by means of external temperature
meter.
1. Leakage spout side.
2. Leakage on top of the Keg.
Through the cooling process condensation water
is formed and can drip under the appliance.
1. After usage of beer the volume indicates
100% again.
2. There is still beer left in the Keg and the
indicator is displaying no beer left 0 %.
3. Volume reading is not trustworthy.
4. Can I adjust the indication?
Repair solution
Cool down process takes very long.
1. Check if there is 10 cm free space around the
appliance.
2. Check if the ambient temperature did not
exceed 32 °C.
3. Check if the fan is turning well and there is
no blockage caused by dust or other particles.
4. Check if the Fan is correct placed (air fl ow
direction)
Unit doesn't cool down.
Check/replace the defective parts.
1. Perform the cooling test as described on
page 6.
2. Clean the NTC See chapter SERVICE
TESTROUTINES step mode 2 how to
check the system or see point 5 "Temperature
display reading cannot be trust" in the table
below.
3. Check if the fan is turning well and there is
no blockage caused by dust or other particles.
4. Exchange fan and Peltier element.
1. Place temperature sensor next to the location
of the NTC assy.
2. Place keg and plug appliance on. For the best
result start measurement if appliance reached
display reading below 10 °C.
3. Read out the external temperature meter and
the display value of the appliance.
4. Subtract a 2.4 °C from the external
temperature reading and compare the values.
Deviation aloud +/− 1 °C, below 3 °C
− 1 °C / + 2 °C.
5. Example:
External indication temperature 7.4 °C
Display reading PerfectDraft system 5 °C
Conclusion (7.4 reading ext. – 2.4 offset
value) = 5 °C, appliance within spec.
1. Check beer tube on hairline cracks or check
closing mechanism tap unit.
2. Check beer tube, tap unit and Keg.
1. Check if doors were closed properly. (If not
closed extra condensation will be build)
2. Check if the drip tray was well placed.
1. Through a voltage dip or appliance has been
switched off the default value (100 %) will
be displayed again. (after pouring one glass of
Beer the right volume will be displayed again)
2. This is normal appliance is adjusted that way.
3. The volume indication is a rough indication;
through air leakage problems the volume
indication become inaccurate.
4. No the volume indication cannot be adjusted.
HD3620/20
8-13