Karcher HD 13-12-4 ST User Manual download pdf (Page 25)

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Fault Possible cause Remedy of whom

Water stream is uneven. Nozzle is blocked. Clean the nozzle. Operator

Amount of water supply is too low. Check water supply. Operator

Inadequate or no flow of de-

tergent

Dosage adjusted too low. Increase dose. Operator

Nozzle is set to "High pressure". Set nozzle to "CHEM". Operator

Suction filter in the detergent tank is

dirty.

Clean the suction filter. Operator

Detergent suck hose leaking. Replace suck hose. Customer Service

Manual detergent dispensing valve oc-

cluded, defective.

Check; clean, replace, if required. Customer Service

Pressure does not build up

in the pump

Nozzle is set to "CHEM" Set nozzle to "High pressure". Operator

Air in the high pressure pump Ventilate the appliance (see "System start-

up")

Operator

Suction site pipe leaking. Check screw fittings and hoses. Operator

Not enough water Ensure adequate water supply. Operator

Sieve in the water inlet is dirty Clean sieve. Operator

High pressure hose leaking. Replace high pressure hose. Customer Service

Piping leaking. Repair piping system. Customer Service

Flow regulator defective. Test flow regulator, repair. Customer Service

The valve in the pump is defective. Replace valve. Customer Service

High pressure pump is

knocking; manometer (op-

tion) is swaying wildly

Vibration dampener is defective. Replace vibration dampener. Operator

Water pump does not suck in adequate

air.

Check suction system and remove leaks. Operator

Detergent container is empty Refill detergent tank. Operator

Water flow temperature too hot. Lower water temperature. Operator

Water flow blocked. Clean sieve in the water inlet, check the water

flow.

Operator

Valve plate or valve spring is defective. Replace parts Customer Service

Advance pump calcified or defective. Check advance pump. Operator

The installation does not

start when switched on or

when pressing the remote

control (optional).

Appliance switch is switched off Turn it on. Operator

On-board electricity supply interrupted. Turn it on. Operator

Pressure switch is defective Replace pressure switch. Customer Service

Motor protection switch was trigged by

overflow or loss of a phase of the elec-

tricity supply.

Check the voltage of the three phases. Electrician/ Custom-

er Service

Motor protection switch is set incorrect-

ly.

Adjust according to circuit diagram. Electrician/ Custom-

er Service

Motor protection switch for controls and

advance pressure pump triggered.

Check motor protection switch. Electrician/ Custom-

er Service

Control safety transformer defective. Examine the cause, replace the control safety

device.

Electrician/ Custom-

er Service

Circuit board defective. Check circuit board, replace if required. Customer Service

Pump starts during the

stand-by period and not

when the hand spray gun is

opened.

Pressure switch or pressure switch ca-

ble defective.

Replace the pressure switch or cable. Customer Service

Installation does not switch

off.

Pump is drawing in air over the empty

detergent tank.

Refill the detergent tank, ventilate suction

line.

Operator

Pressure switch is defective. Replace pressure switch. Electrician/ Custom-

er Service

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Karcher HD 13-12-4 ST User Manual Page 25

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