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System Troubleshooting
ERR 4 is displayed.
If single tank system..
Verify system setting is programmed to
293/298“L”.
Controller on tank 2 does not know the
position of the camshaft. Camshaft
should be rotating to find Home position.
Wait for two minutes for the controller to
return to Home position. The hourglass
should be flashing on the display
indicating the motor is running.
Camshaft on tank 2 is not turning during
ERR 4 display.
Check that motor is connected. Verify that
motor wire harness is connected to motor
and controller module.
Verify that optical sensor is connected
and in place.
Verify that motor gear has engaged cam
gear.
If everything is connected, try replacing in
this order:
1. Wire Harness, Motor, Optical Sensor
Assy
2. Controller
Camshaft on tank 2 is turning more than
five minutes to find Home position:
Verify that optical sensor is in place and
connected to wire.
Verify that camshaft is connected
appropriately.
Verify that no dirt or rubbish is clogging
any of the cam slots.
If motor continues to rotate indefinitely,
replace the following components in this
order:
1. Wire Harness, Motor, Optical Sensor
Assy
2. Controller
Problem
Possible Cause
Solution
Regenerant tank overflow.
a. Uncontrolled refill flow rate.
b. Air Leak in regenerant line to air
check.
c. Drain control clogged with resin or
other debris.
a. Remove refill flow control to clean ball
and seat.
b. Check all connections in regenerant line
for leaks.
c. Clean drain control.
Flowing or dripping water
at drain or regenerant line
after regeneration.
a. Valve stem return spring weak.
b. Debris is preventing valve disc from
closing.
a. Replace spring. (Contact dealer).
b. Remove debris.
