Hach SC4200c, User Manual

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Cleaning the controller
D A N G E R
Always remove power from the controller before performing maintenance activities.
Note: Never use flammable or corrosive solvents to clean any part of the controller. Use of these solvents may
degrade the environmental protection of the unit and may void the warranty.
1. Make sure the controller cover is securely closed.
2. Wipe the controller exterior with a cloth dampened with water, or with a mixture of water and mild
detergent.
Troubleshooting
LED status
Problem Possible cause Solution
The inner green power LED
is off.
All indicator LEDs are off. Power is not supplied to the
controller. Make sure the power cable is connected to the
controller. Contact technical support.
The sensor status LED
stays amber. A warning message is
reported by the sensor. Refer to the sensor warning description shown in the
MSM and to the sensor user manual.
The sensor status LED
stays red. There is an invalid
measurement due to a
sensor error. Refer to the sensor error description shown in the
MSM and to the sensor user manual.
There is a communication
failure between the sensor
and the controller. Examine the sensor and the sensor cable for
damage. If damage is found, contact technical
support.
If no damage is found, disconnect the sensor, wait
until the LED red is off, then connect the sensor
again. Contact technical support if the LED shows
red again.
The sensor status LED
flashes red. The sensor type is not
supported by the cloud. Make sure that the sensor is supported by the MSM.
If the sensor is supported, contact technical support.
The sensor status LED
flashes red. Sensor connection issue Make sure that only two sensors are installed in the
controller. Although two analog module ports are
available, if a digital sensor and two modules are
installed, only two of the three devices will be seen
by the controller.
Make sure that the analog module and the digital
sensor are not connected to the same channel. The
analog module ports are internally connected to the
sensor channel. If a digital sensor and an analog
module is connected to the same channel only the
module is seen by the controller.
Make sure that the controller is compatible with the
mA input module. Contact technical support.
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