Install Instructions

8
SENSOR TROUBLESHOOTING AND REPLACEMENT
When a sensor is disconnected or no longer in proper working condition, an error message is
displayed on the controller Err: Check Probe See Error Code 1 above.
TURN OFF POWER TO THE PROTON CONTROL BOX BEFORE TROUBLESHOOTING OR
REPLACING ANY WIRES AND SENSORS.
Determine if the sensor is truly broken and not a simple disconnection. Please verify the 3-
wire RTD Temperature Probe connector is firmly plugged into its location on the bottom left
of the Proton Control Box.
If the sensor is properly connected to the controller and the condition persists, then the
sensor needs to be replaced. Contact Local Leonard Valve Representation for part number
803203
1. Shut down hot, cold and outlet ball valves and depressurize the pipes. Remove the
defective sensor from the piping and install new sensor in its place. For RTD probes new
compression fittings are required. Do not overtighten compression nuts before re-
pressurizing valve (See Page 9).
2. Open cold line and outlet ball valves to pressurize valve, once it is confirmed there are no
leaks open the hot line as well. Introduce power to the Proton control box and confirm
that the replacement sensor is providing proper feedback and data.