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English
5.906-432.0 Rev. 00 (06/15)
117
9
Troubleshooting
Failure
Measure
Device is not running (no LED/display indication)
–
Check/replace mains voltage, connecting cable and mains
fuse.
–
Check the fuse (F1).
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Check/replace the power switch.
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Check/replace the pressure switch
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Check/adjust/replace control transformer.
–
Check/replace the temperature fuse.
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Check/replace the PCB.
–
Unplug the RFID cable from the PCB and switch RFID in the
software.
Device is not running, LED standby is on or the
display shows three filling levels
–
Check pressure switch electrically and mechanically.
Winding protection contact was triggered
–
Switch off appliance and let it cool down. Remove the cause of
the problem. Turn on the appliance again.
Water pressure too low
–
Check/raise the water input amount.
–
Check/clean/replace water fine filter.
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Vent appliance.
–
Check/replace high-pressure nozzle.
–
Check/replace the pressure and suction valves
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Check / adjust/ replace overflow valve.
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Check/adjust/replace safety valve.
Water is not being heated
–
Check/correct temperature setting.
–
If the water shortage safeguard is switched off, ensure suffi-
cient water supply/repair water shortage safeguard.
–
Check/refill fuel level in the tank.
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Check/replace the solenoid valve fuel pump.
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Check/replace fuel filter.
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Check/correct the setting of the fuel pump.
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Check/correct fuel nozzle.
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Check/replace ignition cables.
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Check/correct distances of the ignition electrodes.
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Check/repair burner blower.
–
Check/correct setting of the air flap.
Control LED is on
–
5.4.1Control panel with LED indicator
During operation, all 10 LEDs are blinking at the
same time, device switches off
–
Check service switch and ribbon cable.
Inadequate or no detergent function
–
Check/correct dosing valve setting.
–
Check/clean detergent tank.
–
Check/clean/replace detergent filter.
–
Check/replace detergent hose, dosing valve and detergent in-
let at the cylinder head.
Pressure reduction in the HP system
–
Check the trigger gun and the O-rings on the high-pressure
hose for leaks / replace.
–
Check the pressure holding valve for leaks/replace the O-
rings.
–
Check / adjust/ replace overflow valve.
–
Check/replace the pressure switch and control piston.
Water leak between the cylinder head and the pis-
ton casing
–
Leakiness of 1 drop per minute and piston is acceptable.
–
Check/replace high pressure and low pressure seals.
Oil leaks between the cylinder head and the pis-
ton casing
–
Replace the oil seals.
Pump is vibrating
–
Check pump for leaks/eliminate leaks.
–
Vent appliance.
Summary of Contents for HDS 7/12 M
Page 14: ...14 English 5 906 432 0 Rev 00 06 15...
Page 60: ...60 English 5 906 432 0 Rev 00 06 15 6 29 Functional diagram vacuuming operation...
Page 125: ...English 5 906 432 0 Rev 00 06 15 125 Circuit diagram 0 089 021 0 HDS 7 12...
Page 126: ...126 English 5 906 432 0 Rev 00 06 15 Circuit diagram 0 089 025 0 HDS 8 18 HDS 9 18...
Page 128: ...128 English 5 906 432 0 Rev 00 06 15 Circuit diagram 0 088 952 0 HDS 10 20 HDS 12 18...
Page 130: ...130 English 5 906 432 0 Rev 00 06 15 Circuit diagram 0 089 9026 0 HDS 13 20...