Hyundai HY155HPW-1 Instruction Manual page 19

EN
Fault When the main switch is turned on the
machine does not start
Cause - Plug not properly connected.
- Connection panel fuses are burnt out.
Repair - Carefully check the plug and the electric cable.
- Check them and replace them.
Fault The motor hums but does not start
Cause - A phase is missing (in three phase models).
- Lows voltage.
- High pressure pump is blocked.
Repair - Contact an authorised service centre.
- Contact an authorised service centre.
- Contact an authorised service centre.
Fault The motor stops suddenly or after a
while
Cause
- The motor-protecting switch is on beCause
of insufficient mains voltage.
Repair - Check the value of the mains voltage.
- Contact an authorised service centre.
Fault When the lance is turned on pressure
values decrease and increase
Cause - The nozzle is either clogged or deformed.
- Either boiler coil or lance are clogged with
limestone.
Repair - Either clean it or replace it.
- Descaling.
Fault To much vibrations at the delivery
Cause - The pressure tank is run down.
- The valve are worn out or dirty.
Repair - Check the pressure in the tank.
- Check and/or replace.
Fault The pump does not reach the fixed pressures
Cause - The pump sucks air.
- The valves are worn out.
- The setting valve area is worn out.
- The nozzle is unsuitable or worn out.
- The seals are worn out.
Repair - Check the suction pipes.
- Check and/or replace.
- Contact an authorised service centre.
- Contact an authorised service centre.
Fault Irregular pressure fluctuations
19
Cause - The suction and/or delivery valves are worn out.
- Presence of foreign matters in the valves,
which generate bad functioning.
- Air suction.
- The seals are worn out.
Re-
- Check and/or replace.
pair
- Check and clean the replace.
- Check the suction pipe.
- Check and/or replace the seals.
Fault Pressure leakage
Cause
- The nozzle is worn out.
- The suction and/or delivery valves are
broken or down.
- Presence of foreign matters in the valves,
which generate the valves bad functioning.
- The setting valve area is worn out.
- The seals are worn out.
Repair - Replace the nozzle.
- Check and/or replace the valves.
- Check and clean the valves.
- Check and/or replace the setting valve area.
- Replace the seals.
Fault Noisiness
Cause - Air suction.
- The suction and/or delivery valve springs
are broken or down.
- Foreign matters in the suction and delivery
valves.
- The bearings are worn out.
- Extreme liquid temperature.
Repair - Check the suction pipes.
- Replace the valve springs.
- Check and clean the suction and delivery
valves.
- Replace the bearings.
- Reduce the liquid temperature.
Fault Water is in the oil
Cause
- The O-ring casing is worn out.
- High moisture in the air.
- The seals are completely worn out.
Repair - Check and/or replace the O-ring.
- Replace the oil with double frequency in
respect of the one suggested.
- Replace the seals.
Fault Filtrations of water from the drains
between casing and head
Cause - The seals are worn out.
- The piston is worn out.
- The O-ring of the piston cap is worn out.