Kärcher HDR 777 Operating Instructions Manual page 31

HDR 777
Problem
Strong odour nuisance
Very high consumption of
degerminating
Industrial water storage
tank (9) overflows
Reaction tank (3) is not
fully drained
Stirrer motor and drainage
pumps (16, 17) do not
switch off after draining the
reaction tank
Cleavage powder is not
pumped into the reaction
tank
Motor for metering splitting
agent is running although
there is no splitting agent left
Stirrer shaft in the reaction
tank (3) doesn't rotate
5.959-106 A2006570 09/03
F. Troubleshooting
Possible cause
Disinfectant metering tank
(6) empty
Metered quantity in (6) too
low
Metering solenoid valve
defective
Disinfectant no longer active
Degerminating agent
metering (6) set too high
Defective solenoid valve
Level sensor in the storage
tank (9) soiled or defective
Solenoid valve for fresh
water inlet (11) soiled or
defective
Storage tank for industrial
water (9) full
Level sensor im storage tank
(9) soiled or defective
Hose or pumps (16 or 17)
between the reaction tank
(3) and filter unit blocked
Dirty agitator shaft or
problem with contacts
Agitator shaft has become
detached from motor shaft
Dirty agitator shaft or
problem with contacts
Metering aperture (f) or
metering device blocked up
with moist splitting agent
No voltage supply to metering
motor, or motor is defective
Dirty or defective level
sensor
No voltage supplied to agitator
motor, or motor is defective
Agitator shaft has become
detached from motor shaft
Remedy
Refill tank
Increase metered quantity
Replace solenoid valve
Check disinfectant and if necessary replace
with new disinfectant
Reduce dosage
Replace solenoid valve
Clean or replace
Clean or replace
In recycling mode wait for the water to be
consumed, otherwise clean or replace the
supply pump for the high-pressure cleaner
(12)
Clean or replace
Clean or replace
Clean or replace
Re-attach shaft and tighten coupling securely
Clean or replace
Empty splitting agent out of metering unit (5)
Clean out aperture or metering device
Add dry splitting agent
Check supply voltage or replace motor, if
required
Clean or replace level sensor
Check supply voltage or replace motor, if
necessary
Re-attach shaft and tighten coupling securely
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