MKN HansDampf 10.1, Service Manual

Page: 27 / 72

Service manual
Functional Troubles
Notice:
This unit allows the replacement of the pressure switch, the filter and the solenoid valves. Any further
dismantling is not allowed (possible water damage, guarantee). After each replacement, a water proof
test is obligatory.
Replacement Of Solenoid Valves
Shut off water supply. Release pressure in the entry lines. Unscrew the solenoid valves.
Pay attention to the three O-rings mounted to the valve body. Take apart the valve body and clean the
valve socket and openings. Carefully clean the valve membrane of sediments. Reassemble the valve
unit (it fits only in easily the correct way). Check the correct location of the three O-rings. The valve
unit must be assembled with the script heading towards the entry opening. Mount the valve body with
a torque of 0.6 +/- 0.1Nm. Assemble the solenoid with the electric connector at the side of the decal P
with a torque of 0.1 – 0.2Nm. Connect the electric supply to the solenoid valve. Mixing up the
electrical valve connections is without consequences. Open the water supply and check the unit water
proof.
Fault Indication
Err 66
(no water)*
Units with a pressure switch display the fault
Err 66
(no water) in case the pressure switch is still
open. Check entry water pressure. Check electrical connections. The pressure switch opens at
1bar.The switch point is adjusted by the inner hexagonal nut incorporated in the pressure switch.
Replacement Of Pressure Switch*
Shut off water supply. Release pressure in the entry line. Depending of type, disassemble metering
unit. Turn the pressure switch to allow access to the mounting spring. Remove mounting spring with a
small screw driver. Now the pressure switch can be removed. Lightly lubricate the O-ring of the
replacement switch and insert it into the socket. Reconnect the mounting spring by pushing slightly on
the pressure switch. The open side of the mounting spring points toward the entry side of the unit. The
mounting spring must be completely inserted. Reconnect electric power and reassemble the metering
unit if necessary. Open the water supply and test water proof.
Installation location 20.x with WaveClean:
*= Only at units with automatic cleaning system WaveClean
27
DynaSteam unit
without pressure
switch (Order- No.
#203831) responsible
for the lower
chamber.
DynaSteam unit with
pressure switch
(Order- No. #203832)
responsible for the upper
chamber.