HD3620/20
7-13
Problem Cause Repair solution
1 Appliance doesn’t
work.
1. Power supply failed.
2. Keg present switch failed.
1. Check voltage output 10 V ± 0.5 V.
(replace power supply)
2. Check/replace micro switch.
2
DISPLAY ERROR SIGNALS
DISPLAY no tap unit.
Faded background of VolDisp.
Green segment.
No FreshDisp.
Software detection:
When the system detects no pressure rise during
running of the pump (duration measurement
10 seconds), the software will interpret that there
is no tap unit placed.
Checks:
• Place tap unit.
• Is the pressure sensor function correctly?
• Is air leakage noticeable in the system?
DISPLAY leakage.
Blinking faded background of VolDisp or
No FreshDisp.
Green segment if TempDisp < 5° C.
Red segment if TempDisp ≥ 5 °C.
Software detection:
The system detects a pressure fall that is greater
than normal when pouring Beer, the software
will interpret that there is a leakage in the
system.
Measurement takes approximately 300 seconds.
Checks:
• Is the pressure sensor function correctly?
• Is air leakage noticeable in the system?
DISPLAY no KEG /standby.
Faded background of VolDisp.
Red segment.
No FreshDisp.
Software detection:
The KEG present/activation switch will give
input to the Interface board.
Checks:
• Is the micro switch function correctly?
60
30
C
0
C
0
30
Temperature display reading cannot be trust.
1. Display indicates 60 °C.
2. Display indicates 1 °C.
3. Display indication not in line with Keg
temperature.
Problem:
1. NTC has short circuit.
2. NTC has open circuit.
3. See chapter SERVICE TESTROUTINES
step mode 2 how to check the system.
3 Blinking display or
pump is “to” often
activated.
(Air Leakage)
Check if air leakage is found internal the appliance.
1. Remove the Keg and tap unit.
2. Block the air Inlet coupling at the Keg side.
3. Actuate the KEG present switch after
±10 seconds the pump will start running
shortly (depending on air leakage).
4. Wait ± 300 sec.
5. Check if the pump is not running the air
leakage is probable external.
If the leakage is caused internally the following
parts must be checked.
1. Leakage hose and/or hose connections.
(Hairline cracks)
2. Leakage in air coupling.
3. Leakage in the pump and/or connections.
4. Defective air pressure sensor.
Air leakage external:
Parts that could cause the external air leakage
are: Tap unit, keg and air coupling.
1. Leakage in connection air coupling - Tap
unit.
2. Leakage in connection Keg - Tap unit.
3. Leakage in the Keg.
REPAIR INSTRUCTIONS
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