Specifications

23G-Series RO System
3024270 Rev G 102 14Oct13
7.2.5 Verifying the Temperature Circuitry of the Main Board
1. Turn the machine OFF.
2. Unplug the power cord for the ECM-100.
3. Disconnect the temperature sensor wires from terminal posts
23 and 24.
4. Cover the temperature sensor wires which were removed from
terminal posts 23 and 24 with electrical tape. Secure these
wires in a location that prevents contact with the main circuit
board.
5. Install a 3 K ohm resistor between terminal posts 23 and 24.
6. Connect the power cord for the ECM-100.
7. Adjust potentiometer marked “temp” (V2) until the temperature
reads 77°F (25°C).
NOTE:
If the temperature cannot be adjusted then the main board may need to be
replaced. Contact your equipment supplier.
8. Unplug the power cord and remove the 3 K ohm resistor, and
install the temperature sensor wires.
9. If the above steps do not correct the problem, replace the feed
conductivity probe.
NOTE:
When installing a new feed conductivity probe, unplug the power cord,
make all connections, and then plug the power cord in.
NOTE:
The temperature sensor can be temporarily bypassed while waiting for
replacement parts by installing a 3 K ohm resistor between terminals 23
and 24.