P.49
2. Pressure switch
Pressure switch, which use the water pressure to
control its spring, connects different control circuit
through contacting different contractor.
Pressure switch has two groups of pressure control
point: point 1 connects point 2 in normal state
without water, when the water level is up to a
certain value, point 3 connects point 1 under the
water pressure, providing power to the heater
through point 3 and making signal of the water
level to the control panel. When the water level is
too high, points 1 connects drain pump directly
through point 6 and then feedback the signal of
overflow to the PCB panel.
Technical parameters:
1) Main touch point subsection capacity:
Point 3: 16(4) A/250V on/off
Point 2: 10(2.5)A/250V on/off
2) Overflow protection point subsection capacity:
1A/250V on/off
The test methods of water level switch:
1) In normal state without water, points 1 and 2
connect and points 1 and 3 disconnect, if points
1 and 3 connect without water, the water is not
in and appear interference malfunction, it should
be replaced.
2) Huff the switch and if it leaks breath, the inlet
will be endless. It should be replaced.
3) When the water pressure reach 98mm of water
column, points 1 and 3 connect. If not connected,
it may appear the malfunction of endless inlet.
6.TROUBLESHOOTING
