Yamato Scientific WG221S Water Purifiers - Manual (Page 26)

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Identification of Parts
Operation Panel
⑥ Indicator (1) …
The displayed (selected) water quality is the converted value at 25 ℃. Another water
quality not indicated (selected) is always being checked. If either water deteriorates its
quality to the specific value, the indicator repeatedly indicates the sensor No. The
indicator also gives the respective error codes in case of stop of raw-water supply,
decrease of water pressure or any other trouble in the device.
<The standard values to determine deterioration of water quality>
Ion-exchanged water: or more
Distilled water: or more
<Example of indication of water deterioration>
Incase you select the ion-exchanged water by SELECT key: When quality of ion-exchanged
water is 0.10×10
-4 S/m while distilled water is 10×10 -4 S/m or more. (deterioration of water)
<Stop of raw-water supply or decrease of water pressure>
comes up and the STAND-BY, an operation display lamp, blinks.
<In trouble>
The display identifies the trouble.
Refer to the Trouble Shooting Guide (P.27) for more information.
Electric conductivity of the electrode C1
(deteriorated distilled water) Electric conductivity of the selected
electrode C3 (ion-exchanged water)