Lmi; Chc Control Station - EcoWater CHC Series Service And Troubleshooting Manual

5.6.5 LMI-

The only LMI unit used was the DC4000 series controllers. Please refer to the attached service
manual for information regarding the screen layout and specifics about the controller. Here is
some basic information about the controller that will aid in troubleshooting.
 The blow down valve is connected to the bleed function of the controller. Each
controller allows you to manually initiate the valve, refer to manual.
 The blow down valve will only open if the current conductivity exceeds the bleed set
point.
 All conductivity probes must be verified once a week for accuracy.
 All models utilize a 4A, 240 Volt fuse on F1 that controls the power to the Bleed Relay.
 Most LMI units are wired directly into the 120V relay found in the motor controller that
will remove the control of the blow down actuator away from the Timer. The 120 Volt
signal from the NO Bleed relay in the controller passes directly to the coil on the relay
found in the motor controller.
 If the controller is wired directly into the Actuated valve, then the NO signal passes to
the OPEN pin on the actuator and the NC signal passes to the CLOSE pin on the
actuator.

5.6.6 CHC Control Station-

The newer CHC skids utilize the CHC Control Station to monitor the conductivity of the system
and control the blow down valve. It utilizes a toroidal sensor that needs to be verified each
month as well as cleaned at least once every quarter. If the conductivity probe fails the
conductivity reading will indicate 0 or 32000. You can use the hidden screen to monitor the
raw analog signal from the sensor, when in air it should read 60K-100 and when in water it
should read 200-4000. If the raw signal does not change verify the presence of the resistor and
check the voltage at the A1 connector. If the voltage does not change, then replace the sensor.
If the raw readings are normal but the meter is not stable, verify calibration or change the
sensor over to the A2 connector and change the VCS software accordingly. The Control Station
controls a relay within the motor starter that is used to control the blow down valve. If you
enter the Bleed screen, you can adjust the set points for the bleed function as well as press the
Bleed Test button to initiate a valve test (reverses current state for a period of 20 seconds).
Refer to the manual in this document for further assistance. If the Control Station Fails, it must
be replaced. Refer to "CHC Control Station Error Codes" for more information
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