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Service and Maintenance
Serial Numbers
The Culligan RO units have a serial number located directly behind the electronic controller on the side panel. Do not
remove or destroy these serial number labels.
They must be referenced if you require repairs or parts replacement under warranty.
Troubleshooting
Problem
1.
Unit is set to Go to Running but
unit does not start.
2.
Unit running but not holding
high pressure.
3.
Unit running but poor quality
(less than 95% rejection)
4.
Low quantity of product water.
5.
Excessive noise.
6.
Inadequate product pressure
(direct feed systems)
Culligan® Series M2 Reverse Osmosis
60
Probable Cause
A. No power to unit.
B. Low feed pressure.
C. Inlet solenoid failure
D. Prefilter fouled.
A. Pump malfunction.
B. System pressure control valve
malfunction.
C. Concentrate flow too high.
D. Product flow too high.
A. Low pump pressure.
B. Module failure.
C. Concentrate throttling valve
open.
D. Poor seal on endcap.
A.-D. Same as 3.
E. Cold water.
A. Air in the plumbing.
B. Misaligned pump.
C. Harmonic vibration.
D. Low feed pressure.
A. Low quantity of product water.
B. Demand for product water ex-
ceeds unit capacity.
Solution
A. Check circuit breaker.
B. Correct low pressure condition.
C. Replace solenoid
D. Replace cartridge
A. Replace pump.
B. Replace valve.
C. Check and adjust concentrate flow, re-
place tubing on A.
D. Test modules.
A. See 2.
B. Replace modules. Check product line
over pressurization.
C. Throttle valve down.
D. Check o-rings inside endcap. Replace
o-rings if necessary.
A.-D. Same as 3.
E. Install additional modules.
A. Check fittings for leaks. Purge air from
system.
B. Remove pump and check for bearing
wear.
C. Install a pressure regulator ahead of the
prefilter.
D. Increase feed pressure above 20 psig.
A. See 4.
B. Install additional modules.
60
Cat. No. 01023095
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