Water Tec Int’l. Inc. Version 02A
19
TROUBLE SHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSE
SOLUTION
RO unit will not start
No electrical power to control circuit
Check power supply
On/Off Switch
Check power / replace
Time delay not operating
Check power / replace
Fuse
Check / replace
Coil in magnetic motor starter burned out
Check / replace motor or coil
Liquid Level Control Relay
Check for power
Pump motor
Check / replace
Low Pressure
Low feed pressure
Incoming feed water supply may be off
Check
Incoming feed water supply line may be
Check / replace line if kinked
Restricted / under sized
Upstream pretreatment
Check all pretreatment
Pre-Filter may be clogged / dirty
Check / replace
Low Pressure Switch
Check for power / replace
No high pressure
Reject valve open too far
Check / adjust
Reject bypass may be open
Check / adjust
High pressure gauge may be broken
Check / replace
Restriction in tubing to gauge
Check / replace / replace if kinked
Pump impellers may be worn
Check / replace impellers or pump
Low water volume to pump
Check
No waste water
Waste Valve may be closed
Check / open / adjust
Clogged drain line
Check / replace / replace if kinked
No product water or low
Pump pressure may be too low
Check / adjust
Product water
Waste valve open too far
Check / adjust
Membranes may be fouled / dirty
Check / clean / replace
Water temperature may be low
Check
High TDS in permeate water TDS monitor or probe
Check / adjust / replace
Low pump pressure
Check / adjust
Membranes may be clogged / dirty
Check / clean / replace