Kärcher HDS 9/50 De Tr1 Service Manual page 43

Dosing liquid softener, valve -Y4
Burner programme selected and flow present:
Pulse time liquid softener is approx. 85ms, equals ap-
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prox. 0.5 ml.
The waiting time between the pulses depends on the
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position of the DIP switches and the set level:
Level 1
DIP 3+4 ON 36s
DIP 3+4 OFF 54s
NOTE
Dip switch 3 and 4 OFF only for HDS 9/50.
Flow switch (-S7) and pressure switch (-S11)
Upon the start, the electronics waits for approx. 1 minute
until the two signals are synchronous. This is necessary,
as the flow is already present shortly after the start, how-
ever, it takes a certain time until the pressure is built up, too
(e.g. due to air in the device). For this reason, the check of
the synchronicity of both switches takes place only after 1
minute after the start, then the two signals must be syn-
chronous within 4 seconds.
Flow switch closed and pressure switch closed within 4
seconds:
Diesel engine is running.
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Flow switch open and pressure switch open within 4 seconds:
Diesel engine is not running.
–
Flow switch closed and pressure switch open within 4 seconds:
Diesel engine stops.
–
ERROR 5 is displayed.
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Flow switch open and pressure switch closed within 4 sec-
onds:
Diesel engine stops.
–
ERROR 5 is displayed.
–
NOTE
In the frost protection mode only flow, but no pressure may
be applied! Should pressure be detected, ERROR 5 oc-
curs.
Level switch detergent (-S12)
Initial start-up:
 Plug the float switch into the control.
 Switch on the device, wait for 20 seconds.
 Indication "CHEM OK" in the slide show on the display
Level switch open:
Indication "CHEM empty" in the slide show on the display.
–
Level switch closed:
Indication "CHEM OK" in the slide show on the display.
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NOTE
For HDS 13/20 and HDS 17/20 only. As soon as the device
with the detergent is detected, the solenoid valve deter-
gent (-Y2) is activated when the gun is pressed. The quan-
tity of the detergent is controlled via the dosing valve.
2 3 4
18s 12s 7s
27s 18s 11s
Level switch float container (-S13)
Float contact closed:
Filling level OK.
–
Float contact open:
Diesel engine stops after 4 seconds.
–
ERROR 4 is displayed.
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Temperature sensor booster heater (-R 3)
The sensor measures the temperature after the boiler out-
let and reports the value directly to the control.
Rated value: R100°C, 3.3kOhm +/-1%.
Short circuit sensor:
Burner blower as well as solenoid valve fuel supply
–
burner (-Y3) are switched off after 4 seconds.
ERROR 10 is displayed.
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Cable break or sensor defective (no signal to control):
Burner blower as well as solenoid valve fuel supply
–
burner (-Y3) are switched off after 4 seconds.
ERROR 10 is displayed.
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Flame sensor (-R 2)
Range 0 - 400: Bright.
Range 401 - 1023: Dark.
DIP switch 1 OFF or operation "cold water":
no evaluation of the flame sensor, no fault messages.
–
DIP switch 1 ON and operation "warm water". The flame
sensor does not become bright although the solenoid
valve fuel burner is open:
Burner blower as well as solenoid valve fuel supply
–
burner (-Y3) are switched off after 4 seconds.
ERROR 11 is displayed.
–
DIP switch 1 ON and operation "warm water". The flame
sensor does not become dark although the solenoid valve
fuel burner is closed:
Solenoid valve fuel supply burner (-Y3) is switched off
–
after 4 seconds.
ERROR 12 is displayed.
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Level sensor fuel tank (-R 1)
Level sensor with 9 switch points, corresponding bargraph
on the display.
Filling level <= 3 bars for at least 30 seconds:
Burner blower as well as solenoid valve fuel supply
–
burner (-Y3) are switched off after 4 seconds.
Symbol "burner deactivated" is shown on the display.
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Filling level 0 bars (0/8):
Diesel engine switches off after 5 minutes.
–
ERROR 6 is displayed.
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No bargraph ( /8):
Cable break, level sensor unplugged or defective.
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Diesel engine is not running.
–
ERROR 6 is displayed.
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English 5.906-736.0 Rev. 00 (07/15)
43