I. May 28, 2008 our technicians on your factory (three plants) purification room air conditioning mainframe troubleshooting, has resumed normal operation of the faulty unit.
Model: CUW160B5Y
Failure phenomenon: 1. unit E6 fault code, 2. can only open a refrigeration system.
Production date: 2004-04
Reason for failure: since the unit put into use for a long time did not do the necessary professional maintenance, condenser, evaporator cleaning, refrigeration lubricating oil replacement, refrigerant replenishment, the external water flow switch aging and so on.
Two. After a comprehensive inspection of the site of all chilled water host, there are currently the following problems:
1. Refrigeration lubricant quality decline, dirty and turbid, need to be replaced in a timely manner.
2. condenser, evaporator lack of professional cleaning led to the operation of the refrigeration system pressure is too high.
3. The running current of the unit is high.
4. Unstable system water flow.
5. Because of the decline in the efficiency of the use of the unit, according to the analysis of the current operation of the unit, all the units have been fully loaded and put into operation with no spare capacity, and when any of the units undergoes an abnormal shutdown failure, it will not be able to meet the end cooling, which results in the loss of control over the temperature and humidity of the end space.
Three. Inspection results
Unit number
Unit model
Production date
Inspection results
Consequences that may result
1
CUW120B5Y
2002.06
Dirty refrigeration oil, high electric current, high pressure, condenser, evaporator dirty, frozen water flow switch aging.
Dirty refrigeration oil, high current, high pressure, dirty condenser, dirty evaporator, aging of refrigeration water flow switch,
Significant increase in energy consumption, frequent breakdowns, protection shutdown, compressor burnout, etc.
2
CUW120B5Y
2002.06
Dirty refrigeration oil, high current, high pressure, dirty condenser, dirty evaporator, aging of refrigeration water flow switch
Significant increase in energy consumption, frequent breakdowns, protection shutdown, compressor burnout, etc. Increase in energy consumption, frequent breakdowns, protection shutdowns, compressor burnout, etc.
3
C7-UW3350B5Y
1997.7
Dirty refrigeration oil, high electric current, high pressure (critical protection), dirty condenser, evaporator, aging of chilled-water flow switch, and insufficient refrigerant.
Substantial increase in energy consumption, frequent malfunctions, protection shutdown, compressor burned out, etc.
4
CUW160B5Y
2004.4
Dirty refrigeration oil, high current, high pressure, dirty condenser, evaporator, aging of refrigerant flow switch
Substantial increase in energy consumption, frequent malfunctions, protection shutdown, compressor burnt out, etc.
Four. Recommendations
1. It is recommended to carry out the necessary comprehensive professional maintenance in a timely manner.
2. Add a standby unit.
Zhuhai XXXX Co.