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).
– Check/replace the power switch.
– Check/replace the pressure switch
– Check/adjust/replace control transformer.
– Check/replace the temperature fuse.
– 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.
– Vent appliance.
– Check/replace high-pressure nozzle.
– Check/replace the pressure and suction valves
– Check / adjust/ replace overflow valve.
– 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.
– Check/replace the solenoid valve fuel pump.
– Check/replace fuel filter.
– Check/correct the setting of the fuel pump.
– Check/correct fuel nozzle.
– Check/replace ignition cables.
– Check/correct distances of the ignition electrodes.
– 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.
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