HD3620/20
5-13
Stepmode
(Press & release
KEG switch)
Test
Stimulus
Response
Remark
0
Show software version
Shows
software
version
2 digits. E.g. 21 = version 2.1
1
Display test
88
88
C
0
!
All segments
are lit
2
Temperature test
Disconnect NTC (J6)
from the PCB.
Apply to (J6) below
resistance values.
NTC simulated value
1. 1 k
Ω
(1%)
2. 10 k
Ω
(1%)
3. 51 k
Ω
(1%)
4. out of range
Display indicates:
1.
1
≅
C (red color)
2.
2
≅
C (green)
3.
3
≅
C (red)
4.
−
(red)
Replace NTC sensor by dummy
sensor.
J6
19k
5k
3
Pressure measurement
Disconnect Pressure
sensor (J14) Connect
external dummy.
Pressure simulated
value (mV)
1. 0 - 2mV
2. 4 - 6mV
3. 8 - 10mV
4. out of range
Freshness indicates:
1.
1 (yellow)
2.
2 (yellow)
3.
3 (yellow)
4.
−
(yellow)
* Replace pressure sensor and apply
dummy.
1
J14
4k7
4k7
1k
4k7
4k7
* Depending on the possibilities
either dummy or pressure can be
applied for testing.
Apply to the air inlet
of the sensor or air
coupling the following
pressures.
Pressure simulated
value (mBar)
1. 0 - 300
2. 600 - 900
3. 1200 - 1500
4. out of range
1.
1 (yellow)
2.
2 (yellow)
3.
3 (yellow)
4.
−
(yellow)
* Apply calibrated air pressure to
the Pressure sensor or by the Air
coupling hole.
* Depending on the possibilities
either voltage or pressure can be
applied for testing.
4
Fan motor low level
1. Fan starts running.
2. Display Off.
Keep KEG switch pressed!!
Fan runs on (80%) level
Voltage across fan:
~7 - 8.5 Vdc / ~0.25 Vrms
5
Fan motor high level
1. Fan starts running.
2. Display Off.
Keep KEG switch pressed!!
Fan runs on (100%) high level
Voltage across fan:
~10.5 Vdc / ~0 Vrms
REPAIR INSTRUCTIONS
