![background image](http://html1.mh-extra.com/html/karcher/hdc-20-8/hdc-20-8_manual_4193479020.webp)
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4
1 Main switch
2 Advance pressure pump
(HDC 20/8 H, HDC 20/16 H only)
3 Water connection
4 Control board
5 Left panel sheet metal
6 Upper panel sheet metal
7 Right panel sheet metal
8 Front panel sheet metal
9 Unlocking button
10 Indicator lamps
11 Pressure sensor
12 Safety valve
13 Manometer
14 High pressure connection
15 Wall panel
16 Overflow valve
17 Pressure accumulator at the high-pres-
sure connection
(HDC 20/8 H, HDC 20/16 H only)
18 Flow switch
19 Oil drain screw
20 Oil level indicator
21 High-pressure pump
22 Oil tank
23 Pressure accumulator at the cylinder
head
24 Electro motor
25 Float tank
26 Temperature sensor
27 Water shortage safeguard
28 Swimmer valve
A ”Low water” indicator lamp
B Indicator lamp for engine over-heating/
pump over-heating
C Indicator lamp "collection error"
D “Ready for use” indicator lamp
Device elements
4
1
2
21
3
28
26
27
20
19
11
16 15
13
12
22
24
25
5
6
7
14
18
10
8
9
17
23
Indicator lamps
20
EN