Troubleshooting - Hyundai HYW11120 User Manual

TROUBLESHOOTING

Should the cleaner malfunction, refer to the following table. Should troubles persist, refer to an
authorized expert technician.
PROBLEM
PUMP NORMALLY RUNS BUT
DOESN'T REACH THE REQUIRED
PRESSURE
FLUCTUATING PRESSURE
PRESSURE DROP
NOISE
WATER IN OIL
WATER DRIPPING FROM PUMP
HEAD
OIL LEAKS
THE MOTOR DOESN'T START
THE MOTOR HUMS BUT DOESN'T
START
THE MOTOR SUDDENLY STOPS
THE BURNER DOESN'T START
The operations marked with the black square must be done only by qualified personnel
CAUTION: Before any repair, disconnect the
machine from the electrical supply.
REASON
Pump sucks air in
Inlet/outlet valves worn or dirty
Nozzle unsuitable or worn
Seals worn
Suction filter clogged
Pin of control valve
Inlet/outlet valves worn, dirty or
clogged
Air intake
Seals worn
Nozzle worn
Inlet/outlet valves dirty
Pin of control valve worn or clogged
Seals worn
Air intake
Inlet/outlet valves dirty, worn or
clogged
Bearings worn
Water-oil seal rings worn
Seals worn
O-ring worn
Oil seal ring worn
Not correctly plugged in
No power supply
The mains voltage is insufficient,
lower than the minimum required
The pump is stuck or frozen
Incorrect extension cable
Tripped thermal overload due to
overheating
Lack of diesel
Electrodes worn
Electrodes damaged
Diesel filter clogged
Diesel nozzle clogged
Fuse of the burner and transformer
motor blown
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REMEDY
Operate the pump with spray gun open
Clean or replace
Check and/or replace
Check and/or replace
Clean or replace
Clean or replace
Check/clean or replace
Check that hoses and fittings are air tight
Check and/or replace
Replace nozzle
Check/clean or replace
Check and/or replace
Check and/or replace
Check that hose and fittings are air-tight
Check, clean and/or replace
Check and/or replace
Check and/or replace
Replace
Replace
Replace
Check cable plug and switch
Check cable plug and switch
Check that the mains power supply
is adequate
Check by manually turning the motor
(see MAINTENANCE)
Replace extension cable
Check that the mains voltage matches the
specifications. Switch off the motor and let
it cool for a few minutes
Check the diesel level and/or the float
Adjust (see MAINTENANCE)
Replace
Replace
Clean the burner nozzle
Replace