Troubleshooting – Karcher HDR 777 EU User Manual
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6
Troubleshooting
Fault
Possible cause
Remedy
of whom
Indicator lamp "Fault" glows
red
Filter full.
Clean or replace filter (see "Maintenance plan"). Operator
Dosing unit for splitting powder is
empty.
Switch off the plant. Fill up splitting powder up to
max. 2/3 of the dosing unit; restart the plant.
Operator
Dosing unit for liquid splitting agen
tis empty or dosing unit for sterilisa-
tion agent is empty (only for recy-
cling operations).
Switch off the plant. Top up liquid splitting agent
or sterilisation agent.
Operator
The short filling level probe in the
reaction tank gets triggered even if
the long probe in the reaction con-
tainer does not get triggered.
Switch off the plant. Empty the reaction tank,
clean the probes and then restart the plant. In-
form Customer Service if the short filling level
probe gets triggered again.
Operator
Contact problem in the reaction
tank (long filling level probe gets
triggered although the stirrer
shows "empty").
Switch off the plant. Clean the probes and then
restart the plant. Inform Customer Service if the
problem persists.
Operator
Contact problem in processed wa-
ter storage tank. Filling level probe
gets triggered although the long
probe shows "empty".
Switch off the plant. Clean the probes and then
restart the plant. Inform Customer Service if the
problem persists.
Operator
Contact problem of filling level
probes in the swimmer box of the
HDS - ASA/HDR attachment set
(possible only while recycling using
HDS - ASA/HDR attachment set).
Switch off the plant. Clean the probes and then
restart the plant. Inform Customer Service if the
problem persists.
Operator
Excess running of the pumps un-
der the reaction tank.
Inform Customer Service
Operator
Floater switch in the dirt collector
(option) is triggered.
Check plant and high-pressure cleaner and in-
form Customer Service if required.
Operator/Customer
Service
Stirrer shaft has got detached from
the motor shaft.
Faster the stirrer shaft back to the coupling; se-
cure the coupling.
Customer Service
Reaction tank overflows
Filling level probe in the reaction
tank is dirty, defective or adjusted
wrongly.
Check, clean, adjust or replace filling level
probes.
Operator/Customer
Service
Plant is not running
No supply voltage
Mains cable in socket? Check mains.
Operator
Dirt collector is empty.
Fill dirt collector or hang the dirt water pump a lit-
tle lower.
Operator
Processed water storage tank in
the filter unit is filled.
In recycling, wait till the processed water is con-
sumed by the high-pressure cleaner; otherwise
clean or replace the supply pump for high-pres-
sure cleaner.
Operator/Customer
Service
Contact problems or control is de-
fective.
Check contact or replace the control PCB.
Customer Service
Dirt water pump in the dirt
collector is not running
Pump is not connected, floater
switch S2 is not closed or pump is
defective.
Connect the pump. Connect the floater switch S2
or bridge the contact on the PCB. Clean or re-
place the pump.
Customer Service
Dirt water pump does not
switch off
Filling level probe in the reaction
tank is dirty or defective.
Clean or replace the filling level probe.
Customer Service
Strong foul odour
Dosing container for sterilisation
agent is empty.
Refill container.
Operator
Dosing in the dosing container for
the sterilisation agent is too less.
Increase dose.
Customer Service
Dosing solenoid valve is defective. Replace solenoid valve.
Customer Service
Sterilisation agent is no longer ac-
tive.
Check sterilisation agent and replace with a new
one, if required.
Operator/Customer
Service
Consumption of sterilisation
agent is very high
Dosing in the dosing container for
the sterilisation agent is too high.
Reduce dose.
Customer Service
Dosing solenoid valve is defective. Replace solenoid valve.
Customer Service
Processed water tank is
overflowing
Filling level probe in the processed
water tank is dirty or defective.
Clean or replace the filling level probe.
Operator/Customer
Service
Solenoid valve for fresh water sup-
ply is dirty or defective.
Clean or replace the solenoid valve.
Operator/Customer
Service
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