Walchem LK Series Instruction Manual

Contents

Walchem LK Series Instruction Manual Manual pdf 28 page image

2510 Dust is clogging mouth of pressure gauge orpressure gauge is defective.Clean or replace.11 Leak from safety valve Readjust pressure setting or replace if it isdefective.12 Cavitation occurs due to insufficient NPSHr. Examine suction conditions.13 Lubricating oil of the drive unit is not correct. Check that the correct oil has been used. Checkthe oil quantity and level. Replenish or replace ifnecessary.14 Defective oil seal or O-ring Replace.15 Defective motor Replace.16 Wrong wiring or defective contact Check wiring. Replace switch, etc. if necessary.Ref. Cause Countermeasure17 Voltage drop Inspect cause and take countermeasuresaccordingly.18 Blown fuse. Inspect cause and take countermeasuresaccordingly.19 Overload (excessive discharge pressure) Check discharge line and take countermeasuresto lower the pressure.12 Maintenance and Inspection Daily inspection1. Check whether the pump operates smoothly and without any abnormal noise or vibration.2. Check the level of the liquid in the solution supply tank.3. Check the pump and piping for leakages.4. Check the drive unit for oil loss and leakage.5. Compare the discharge pressure and electric current measured during operation with the valuesindicated on the motor nameplate for verification of normal pump load. Note that the values indicated on the pressure gauge vary in proportion to the specificgravity of the liquid. The valve to the pressure gauge must be opened only whenmeasurement is carried out. It must be closed upon the completion of eachmeasurement. If the valve remains open during pump operation, the meter mechanismin the gauge may be affected or damaged by noise or vibration.6. If a spare pump is available, activate it from time to time to keep it ready for use any time.Check to be sure there are no leaks from the pump before operating it. If leakage is detected,never try to operate the pump.7. Check to be sure the discharge pressure, discharge flow rate, and motor power supply voltagedo not fluctuate during pump operation. If considerable fluctuation is observed, refer to theTroubleshooting section for corrective measures.