Operation and Maintenance Manual for

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LC Manual 11/02 Rev. 3 TROUBLESHOOTING 5.1 SYSTEM INOPERATIVE 5.0 TROUBLESHOOTING A. Check to see if power to the unit is turned on. B. Verify the controller indicates that the system is on, if not press the system start button. C. Verify that the motor starter relay is engaging, if not reset the overload relay. If the overload relay fails to reset, replace the overload relay or contact your USFilter representative for further assistance. D. Check the motor starter coil for proper operation and replace if necessary. E. With a voltmeter check that power is being supplied to the motor. If proper voltage is going to the motor but it does not run, replace the motor or contact your USFilter representative for further assistance. 5.2 LOW SYSTEM PRESSURE A. If the feed pressure before the prefilter is too low, check for obstruction in equipment and piping between feed source and RO unit. B. If the feed pressure after the prefilter is below normal, check for high differential pressure across the prefilter (plugging), replace the filter cartridge. C. If the membrane feed pressure is below normal, verify that the pump is running. D. Verify that the reject, reject recycle and product flows are normal. If not, adjust to design flow rates using the Equipment Specifications located in the Appendix and recheck membrane feed pressure. E. If the flows cannot be adjusted to the above flow rates, slowly close the reject and reject recirculation valves to observe the maximum pressure to the membrane. Do this only briefly and do not completely close the valve. If this pressure does not exceed 150 psig, repair or replace the pump/motor. 5.3 LOW PERCENT RECOVERY A. Check product, reject, reject recycle flow rates and feed pressures to be sure they are normal; adjust flows as necessary. B. If feed to membrane pressure exceeds normal by 10% and product flow is lower than normal at a given temperature, the RO membranes are beginning to fail. They should be cleaned or replaced. 5.4 HIGH PERCENT RECOVERY A. Verify that the reject, reject recycle and product flows are normal. If not, adjust to design flow rates using the Equipment Specifications located in the Appendix. B. Set the membrane pressure to 150 psig. C. If the product flow is high after adjusting the pressures and flows, the RO membrane o-rings may be leaking. Check percent rejection. USFilter 5-1
TROUBLESHOOTING LC Manual 11/02 Rev. 3 5.5 LOW SALT REJECTION A. Verify that the feed water temperature has not increased substantially from normal. High temperatures can affect percent rejection, as temperature increases, percent rejection decreases. B. Check product, reject, reject recycle flow rates and feed pressures per the Equipment Specifications in the Appendix, and adjust flows/pressures as necessary. C. Another possibility is high CO2 content in the inlet water. CO2 readily permeates the membrane. High CO2 content water will also have a pH of less than 6.0. D. RO membrane o-rings may not be seated correctly, check the percent rejection for each individual membrane housing. Remove membranes and verify o-rings are seated correctly on any that are below 90% rejection. E. If the above possibilities are eliminated, RO membranes are beginning to fail. They should be cleaned or replaced. 5.6 SYSTEM KEEPS SHUTTING OFF A. Observe the controller indicators to see if they indicate the cause for system shutdown, if the controller is shutting the unit down refer to the RO controller section of this manual for further discussion. B. The motor is equipped with automatic thermal overload protection. If the motor gets too hot it will shut down. After it has cooled it will restart. Excessive amp draw can cause the motor to get too hot. C. If an optional sensor is being used (Tank Level switch(es), Pretreatment Interlock), check to verify the sensor is not shutting off the system. 5.7 SYSTEM SHUTOFF, LOW PRESSURE A. Verify that the feed water pressure is above 15 psig. B. Check the differential pressure across prefilter(s). It should be less than 10 psig, if not replace the prefilter cartridge filter and recheck feed pressure. C. Check the pump suction pressure. It should be greater than 15 psig, if not check for obstruction in piping between the prefilter and pump suction. D. Verify the low pressure switch is operating properly. 5.8 SYSTEM SHUTOFF, HIGH TEMPERATURE A. Check incoming water temperature. B. The high temperature shut down is user settable and should activate around 35°C ± 3°C (95°F ± 5°F). C. The temperature thermistor (sensor) is combined in the feed conductivity probe circuitry. The probe may be replaced if it is giving an erroneous temperature indication. (Refer to the RO Controller manual in the Appendix for correct values.) 5-2 USFilter
Page 1 and 2: USFilter 10 Technology Drive Lowell
Page 3 and 4: This manual discloses information i
Page 5 and 6: TABLE OF CONTENTS SECTION DESCRIPTI
Page 7 and 8: LC Manual 11/02 Rev. 3 INTRODUCTION
Page 9 and 10: LC Manual 11/02 Rev. 3 INTRODUCTION
Page 11 and 12: LC Manual 11/02 Rev. 3 SYSTEM INSTA
Page 13 and 14: LC Manual 11/02 Rev. 3 SYSTEM INSTA
Page 15 and 16: LC Manual 11/02 Rev. 3 OPERATING IN
Page 21 and 22: SYSTEM MAINTENANCE LC Manual 11/02
Page 29: SYSTEM MAINTENANCE LC Manual 11/02
Page 33 and 34: LC Manual 11/02 Rev. 3 WARRANTY 6.1
Page 35 and 36: APPENDIX LC Manual 11/02 Rev. 3 7.1
Page 41 and 42: APPENDIX LC Manual 11/02 Rev. 3 RO
Page 45 and 46: Product Description/Equipment Speci
Page 47 and 48: Process Water Systems General Speci
Page 49 and 50: Process Water Systems Low feed pres
Page 51 and 52: Process Water Systems Skid Cleaning
Page 53 and 54: Series 1, 2 & 3 Pumps Page 1 of 2 [
Page 55 and 56: Product Information FILMTEC Membran
Page 57 and 58: USFilter USFilter USFilter USFilter
Page 59 and 60: Conventions and Symbols ii Special
Page 61 and 62: Table of Contents iv MC10 Overview
Page 63 and 64: Specifications The MC10 incorporate
Page 65 and 66: ! The MC10 may be configured to use
Page 67 and 68: Installation 2 Environmental The MC
Page 69 and 70: I/O The wiring diagram for the inpu
Page 71 and 72: Operation 3 Controls The MC10 is ho
Page 73 and 74: Sequence The normal startup and shu
Page 75 and 76: 7 Perm Divert TD Sec 8 High Temp SP
Page 77 and 78: Time Delays Time delays and deadban
Page 79 and 80: Important Please note: • Temperat
Page 81 and 82:
Troubleshooting 5 The MC10 Reverse
Page 83 and 84:
Type of Problem Possible Cause or S
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