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