How do i fix a code 5 error on a culligan 100 water system?

https://www.manualslib.com/manual/859287/Culligan-Medallist-Series.html?page=8

Quoting from link to free manual shown:

FAILURE MODE
There are certain conditions that can be interpreted by the circuit board as a failure of the drive motor or motor
position switch. Upon failure detection the control will cease further operation. A telephone hand set symbol will be
shown in the upper left corner of the display and the error code will be shown. Listed below are the different error
codes.
1. Motor Always Turning
Error code "E1" occurs when the circuit board detects changes in the motor program switch when the motor is
not supposed to be turning. The phone icon and "E1" will be lit in the display.
2. Motor Never Turns
The Culligan Medallist Series control is equipped to detect no change in the motor position when the motor is
supposed to be turning (motor or piston locked in a frozen position). The AccuSoft circuit board will apply
power to the motor for 20 seconds. If there is no change in the motor homing or position switch, the control will
power down for 1 minute. The circuit board will repeat this procedure two more times in an attempt to remove the
obstruction. If no movement has been detected, the control will permanently power down and a phone icon and
an "E2" will appear in the display.
3. Homing Error
Error code "E3" occurs when the circuit board detects when the control is unexpectedly in the home position.
The phone icon and "E3" will be lit in the display.
Error Display Cancellation
The error code display can be removed by removing the power to the control for 1 minute. After clearing an error
condition, the control will default to the factory settings when power is restored.

Call Culligan on this problem.

The main piston is frozen up and needs to be replaced. It gets bent due to poor design. Culligan sells a rebuild kit for this that includes the piston, seal kit, brine refill piston and sleeve along with a new metal bracket to prevent the shaft on the main piston from bending and causing this issue again. There is also a new C clip for the drive gear on top.

A lot of people mistake the "S" as a 5. The error dispaly says "CS" which means call service. You probably have a gasket hung up and need a new seal pack.

First check the eductor assembly. Top of valve under chrome plate. Pull it out and clean it (after bypassing and depressurizing the system)
If that is OK the the brine piston will need to be replaced. There is a rebuild kit for this series valve that is about $120 that includes the refill piston and a retrofit kit. It would be wise to rebuild the valve.
See your local culligan dealer
RJH2O

Just unplug it for several minutes. You will need to reset the programming, hardness, time of day.
RJ

If it is running small amounts of water to the drain when it is in service position this means you have a bad seal pack and it needs to be replaced. The "sealpack" is the main piston and seals that control the hydraulics of the valve. When water runs to the drain constantly either the piston is jammed (which would show an error code) or there is a bad seal causing water to get by. I suggest calling Culligan or if you are handy you can do this yourself. You need a sealpack and refill piston. It takes about 20 minutes. The kit is available from Culligan.
RJ

This is under warranty still call Culligan for service. Is it flashing an error code? In the meanwhile unplug the system for two minutes and plug back in, this may reset the controls.
RJ

the wasre filter is plugged up if not shutting off