Watts PWR4021 - Manual (Page 9)

9
Pop-Up Screens
Under certain circumstances a pop-up screen may be displayed.
These look like a window that partially blocks out the screen behind
it. The conditions that display pop-up screens are:
Low Inlet Pressure
Pretreatment Interlock
Overload Conditions
Trying to calibrate if the temperature and/or conductivity is not stable.
Service and Maintenance
The CI-1000 Reverse Osmosis Controller is designed for ease of
maintenance and minimum service. Since the highest quality of
electronic semiconductor components are used in this design, it
is not likely that circuit malfunctions or failures will occur. It is our
recommendation that service be limited to identifying malfunctions at
the board level and that component level troubleshooting be referred
to the factory.
Field failures that most frequently occur are:
- Improper or broken wiring connections
- Incorrect wiring of the motor starter
- Improper grounding
- Cable run is too long
- Water in connectors
- Dirty probes
- Defective probes
Troubleshooting
DescRiPtion of PRoblem Possible cause oR solution
System shuts down on low-pressure but pressure is okay. 1. Check the pressure switch set point
2. Possible short in wiring to pressure switch
3. Defective pressure switch
4. Orifice in pressure switch may be plugged
Pressing the Start/Stop button does not turn the system on. 1. Verify that the key switch is on
2. Verify that the circular connector on the bottom of the controller is attached
3. Check the fuse in the power inlet
Conductivity monitor does not display the proper reading. 1. Calibrate the controller
2. Check the wiring to the conductivity probe
3. Clean the conductivity probe
4. Replace the conductivity probe
Erratic conductivity display 1. Conductivity probe wiring may be too close to high voltage lines.
2. Check for moisture in the connection between the probe and the lead wire.