Oryx SCA1200ht, Руководство по ремонту

Страница: 37 / 53

7755 S Research Dr., Suite 105, Tempe, AZ 85284
37
Figure 33 - Water Level Sensor
E. Water Level Sensor Troubleshooting
Tools Needed:
Multimeter
Philips Screwdriver
Symptom
:
SCA beeping, high or low water LED flashing on control panel .
Theory:
The float sensor uses two internal switches within a hollow rod straddled by a watertight
stainless-steel float that slides along the rod as the water level changes ( See Figure 33 ). If
the water level is at the minimum or maximum level, the magnetic property of the float
closes an internal switch, which generates an error.
Steps:
1. Ohm out the Water Level Sensor
a. Remove the sensor from the mounting plate ( See Sensor Assembly Replacement Section V) .
b.
Visually inspect the float assembly. If there is a buildup on the shaft that inhibits the free up
and down motion of the float, clean off the shaft. A scrub pad can be used to remove any buildup
on the shaft. Ensure the float moves freely from the bottom to the top of the shaft. Very rarely, the
float can be permeated with water. Ensure the integrity of the float.
c. Ohm out across WLS-H on the connector.
i.With the float not at the top of the sensor assembly.
•
~22 Kilo Ohms
ii.With the float at the top.
•
0 ohms (continuous).
d. Ohm out across WLS-L on the connector.
i.With the float not at the bottom.
•
~22 Kilo Ohms
ii.With the float at the bottom.
•
0 ohms (continuous).
NOTE
:
If any measurement is infinite, or it measures 0 ohms (continuous) when the float is in the middle of
the shaft, the Water Level Sensor will need to be replaced.