Watts PWR4011 - Manual (Page 7)

7
Motor Troubleshooting Guide cont.
PRoblem Possible cause coRRective action
Wrong rotation Wrong sequence of phases Reverse connections at motor or at switchboard.
Motor overheats while running
under load
Overloaded Reduce load.
Frame or bracket vents may be clogged with dirt and prevent proper
ventilation of motor.
Open vent holes and check for a continuous stream of air from the motor.
Motor may have one phase open Check to make sure that all leads are well connected.
Grounded could Locate and repair.
Unbalanced terminal voltage Check for faulty leads, connections and transformers.
Motor vibrates after correcting
have been made
motor misaligned Realign
Weak support Strengthen base.
Coupling out of balance Balance coupling.
Driven equipment unbalanced Rebalance driven equipment.
Defective ball bearing Replace bearing.
Bearing not in line Line properly.
Balancing weights shifted Rebalance motor.
Polyphase motor running single phase Check for open circuit.
Excessive end play Adjust bearing or add washer.
Unbalanced line current on
polyphase motors during normal
operation
Unequal terminal volts Check leads and connections
Single phase operation Check for open contacts
Scraping noise Fan rubbing air shield Remove interference.
Fan striking insulation Clear fan.
loose on bedplate Tighten holding bolts.
Noisy operation Airgap not uniform Check and correct bracket fits or bearing.
Rotor unbalance Rebalance.
Hot bearings general Bent or sprung shaft Straighten or replace shaft.
Excessive belt pull Decrease belt tension.
Pulleys too far away Move pulley closer to motor bearing.
Pulley diameter too small Use larger pulleys.
Misalignment Correct by realignment of drive.
Hot bearings ball Insufficient grease Maintain proper quantity of grease in bearing.
Deterioration of grease, or lubricant contaminated
Remove old grease, wash bearings thoroughly in kerosene and replace with new
grease.
Excess lubricant Reduce quantity of grease: bearing should not be more than ½ filled.
Overloaded bearing Check alignment, side and end thrust.
Broken ball or rough races Replace bearing: first clean housing thoroughly.
These instructions do not cover all details or variations in equipment nor provide for every possible condition to be met in connection with installation, operation or maintenance. Chart courtesy of
Marathon Electric.
RO System Troubleshooting
PRoblem coRRective action
General
high Product Water tDs
Membrane expanded. Replace membrane.
Membrane attack by chlorine Carbon pre-filter may be exhausted. Replace with a new cartridge.
Clogged pre-filter-creates pressure drop and low reject flow. Replace pre-filter cartridge.
Feed pressure too low. Feed pressure must be at least 20 psi.
Insufficiently flushed post-filter cartridge. Flush post-filter with pure water.
Brine seal on membrane leaks. Determine if seal or o-ring is bad. Replace as needed.
no Product Water or not enough Product Water
Feed water shut off. Turn on feed water.
Low feed pressure. Feed pressure must be at least 20 psi. Consider booster pump.
Pre-filter cartridge clogged. Replace pre-filter cartridge.
Membrane fouled. Determine and correct cause; replace membrane.
Product check valve stuck. Replace check valve fitting.
Low pump discharge pressure Open pump discharge valve, replace pump