Kärcher HDS 9/50 De Tr1 Service Manual page 44

Burner operation, contactor K8
For the release of the burner the following conditions must
be met:
Flow present (-S7).
–
Level fuel tank > 3 bars.
–
Temperature sensor booster heater (-R 3) is connect-
–
ed.
Hot water operation selected.
–
Measured temperature < target temperature:
–
The burner switches on, the solenoid valve fuel burner
opens 4 seconds after the start of the blower motor.
45 minutes continuous operation
The switch-off continuous operation is activated:
Diesel engine switches off after 45 minutes continuous
–
operation.
ERROR 15 is displayed.
–
The gun is closed within 45 minutes:
The countdown of 45 minutes is reset, the device does
–
not switch off.
Switch-off continuous operation is deactivated:
The diesel engine does not switch off after 45 minutes
–
of continuous operation.
45 minutes continuous break
The switch-off continuous break is activated:
The diesel engine switches off after 45 minutes of con-
–
tinuous break.
ERROR 14 is displayed.
–
The gun is opened within 45 minutes:
The countdown of 45 minutes is reset, the device does
–
not switch off.
Switch-off continuous break is deactivated:
The diesel engine does not switch off after 45 minutes
–
continuous break.
Counter gun switching operations
The number of gun switching operations are saved every
240 seconds.
To test the counter, proceed as follows:
 Read the number of gun switching operations in the
service menu "Service gun" (80°C switch position).
 Perform 10 gun switching operations.
 Wait for 240 seconds
 Read the number of gun switching operations in the
service menu again, this must be higher by 10 now.
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English 5.906-736.0 Rev. 00 (07/15)