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TROUBLESHOOTING
Use the inspections in the table below if the tool does not operate normally. If this does not remedy the problem, consult your
dealer or the Hitachi Authorized Service Center.
Symptom Possible cause Remedy
The motor won’t operate
when the trigger is pulled.
No battery is installed. Install battery.
The switch is set at “OFF”. Switch the washer on.
The battery’s capacity is low. Charge the battery.
The power lamp blinks
repeatedly, and the washer
does not start.
The battery is overheated. If left alone, the battery will automatically
begin charging if its temperature decreases,
but this may reduce battery life. It is
recommended that the battery be cooled in
a well-ventilated location away from direct
sunlight before charging it.
The power lamp is rapidly
blinking, and the washer
does not start.
There is an abnormality. Check and remove any foreign matter from
between the terminals of the battery and
the main unit. If the rapid blinking continues,
contact a Hitachi Authorized Service Center
for repairs, as the problem may be the
washer.
Water is not being
discharged.
Water pressure is low.
Water pressure is not
steady.
Water discharge is
abnormal.
The motor is groaning.
The strainer is blocked. Wash the strainer, which is incorporated into
the water feed inlet.
The nozzle is blocked. Clean the end of the nozzle with the nozzle
cleaner pin supplied.
The water feed connector is loose. Check and make sure that the water feed
connector is securely tightened.
There is water leaking from the high-
pressure hose.
Check and make sure that the connector
is rmly connected.
If the high-pressure hose is damaged,
contact a Hitachi Authorized Service
Center for repairs.
There is water leaking from the main unit or
the trigger gun.
Contact a Hitachi Authorized Service Center
for repairs.
Tank water
supply
The main unit and tank are not properly
connected.
Check and make sure that the main unit and
tank are securely connected.
There is little water in the tank. Turn o the power switch and promptly
replenish the water in the tank.
The tank’s valve cap is clogged. Detach and clean the valve cap.
Faucet
connection
The water volume or pressure from the
faucet is low.
Check and make sure that the hose has
a suitable inner diameter and that it isn’t
twisted.
Fully open the faucet.
Stored water
supply
There is not enough priming water. Immerse the hose in the stored water to ll
the hose with more water (priming water).
There is a large height di erence between
the water feed inlet and the surface of the
stored water.
Place the washer within the range of the
maximum height of suction.
The inner diameter of the hose is not
suitable.
Use a hose with an inner diameter of
7.5 – 9 mm.
The motor suddenly stops. No remaining battery power. Charge the battery.
The battery is overheated (power lamp is
blinking).
Detach the battery from the main unit and
allow it to su ciently cool in a well-ventilated
location away from direct sunlight .
There is a problem with the main unit
(power lamp is rapidly blinking).
Contact a Hitachi Authorized Service Center
for repairs.
The motor repeatedly
switches on and o while
spraying water.
The nozzle is blocked by foreign matter. Clean the nozzle with the included nozzle
cleaner pin.
There is little water in the tank. Turn o the power switch and promptly
replenish the water.
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