Installation and Service Manual – L Series Reverse Osmosis System
Systems and Components
Membranes
,
Filters
,
Chemicals
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Page 20
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System
Controller
Troubleshooting
–
Series
S100
Caution:
Hazardous voltages are present when power is applied to the controller. Pressing the Power
key DOES NOT remove these voltages. The power must be disconnected from the power source. When
connecting or disconnecting any wiring to the unit, be sure the power is turned off at the disconnect or
breaker.
Note:
If fuse F1 is blown, none of the outputs will operate. If fuse F2 is blown, the controller will be
inoperative.
PROBLEM
TROUBLESHOOTING STEPS
System Inoperative
Is the water quality display lit? If no, check fuse F2 located below the
transformer. If the fuse is OK, use a voltmeter to verify that power is applied to
power terminals L1 and L2 . If power is applied to the power terminals and the
above checks are OK, the board may be defective and should be replaced. If
no power is applied to the board, check the power wiring to the controller.
Inlet Valve Will Not Operate
Is the controller off? If no, are any shut down conditions active? If no, is the
inlet LED, I2 lit? If no, replace the board. If yes, check fuse F1. If bad, replace
the fuse. If it is OK, check the inlet terminals for power. Is there power? If no,
replace the board. If yes, check the valve and valve wiring.
RO Pump Will Not Operate
Is the controller off? If no, are any shut down conditions active? If no, is the RO
LED, I1 lit? If no, replace the board. If yes, check fuse F1. If bad, replace the
fuse. If it is OK, check the RO pump terminals for power. Is there power? If no,
replace the board. If yes, check the pump motor and motor wiring.
No Flush or Not Flushing
Correctly
Verify that the flush jumpers, J11 and J12 are set correctly.
No or Incorrect TDS Reading
Is the sensor wired correctly? If no, correct wiring. Is the sensor installed as
described in the installation section? If no, install correctly. Is unit calibrated
correctly? If no, recalibrate. Disconnect green and white wires of sensor from
P3. Does reading show 0? If no, replace board. If yes, reconnect wires and
remove sensor from piping and dry. Does reading show 0? If no, replace
sensor. If yes, short pins of sensor. Does reading show ^ ^ ^? If no, replace
board.
Pump Troubleshooting (for Systems with Procon Pumps)
(L-12521A, L-125A, L-225A: All Voltages; L-14A-116, L-24A: 60Hz only)
PROBLEM
POSSIBLE CAUSE
SOLUTION
Pump is working below its
capacity
(continued on next page)
Inlet or internal strainer is
clogged or restricted
Clean out the inlet line. If you have an inlet
filter or internal strainer, clean it (replace it if
more than 20% clogged). Do not allow
debris to fall into pump from filter.
Pump is rotating in the wrong
direction
Change motor rotation by properly rewiring
it.