Specifications

23G-Series RO System
3024270 Rev G 92 14Oct13
Troubleshooting Guide - Machine Performance
Symptom
Possible Causes
Remedies
Declining rejection (or
high permeate
conductivity)
(continued)
Overfeeding buffer solution due to
improper adjustment of pump or
low inlet pressure.
Check the pH of the concentrate and adjust to
6.0. Check the inlet pressure to be sure
siphoning of the buffer solution is not occurring.
Check pH probe calibration.
Troubleshooting Guide – EMC-100 Display Failures
Symptom
Possible Causes
Remedies
Permeate conductivity
consistently reads over
range (“O/R”) and/or
triggers the alarm
Permeate conductivity value in
excess of maximum value and/or
alarm setpoint, broken wire, probe
fouled or defective.
Check the wiring connections on the Main
Board terminals 27 and 28. Clean the permeate
conductivity probe, check calibration. Contact
your equipment supplier for assistance.
One or more pressure
readings on ECM-100
Display screen are
zero or unusually high
Faulty pressure transducer(s),
cable(s), or connection(s).
Disconnect the pressure transducer cable at
sensor end and inspect for possible water
corrosion damage. Expose the soldered tabs to
reveal a possible short or broken connection.
Take care to avoid pinching the soldered wire
ends together or breaking the wires when
reinstalling the plug on the cable end and into
the sensor body. Try plugging the pressure
transducer into other pressure transducer
cables to isolate the problem to the sensor or
sensor cable. Repair or replace the sensor or
cable. Calibrate sensor.
One or more pressure
readings on the ECM-
100 are “drifting” over
a period of time (days),
requiring repeated
calibration
Calibration characteristics of
pressure transducer have
changed and transducer may be
failing.
Refer to pressure calibration (Section 8.6).
Replace transducer if necessary. Contact your
equipment supplier for assistance. Debris in
port of transducer.
pH reading on ECM-
100 display is off by
greater than 0.4 units,
when check in a
standard solution of 4
and 7 or 10 at ambient
temperature
Faulty pH probe.
Check by soaking for 10 minutes in a 2 pH acid
solution. Recalibrate the pH probe monthly.
Replace and calibrate pH sensor as required.
Faulty pH probe.
On V2 boards, check for 3.1 to 3.3 volts DC at
the pH test points on J3 with the probe in a 4.0
pH solution, and 2.4 to 2.6 volts when in 7.0 pH
solution or 1.6 to 1.9 volts in a 10.0 pH solution.
pH reading
(continued)
Life expectancy for a pH probe is
18 to 24 months.
The pH probe may need to be replaced.
Replace and recalibrate probe.
Temperature in ECM-
100 cannot be
adjusted
Temperature circuit failure.
Refer to ECM-100 Troubleshooting
(Section 7.2).
Water leaking from
O-ring or diaphragm failure.
Replace valve.