VZN 500 SERIES
18
P/N 1013008 Rev C 11/19
®
Problem
Possible Cause
Corrective Action
Unit does not have power.
The power cord is not plugged into the
appropriate outlet or control box.
Plug power cord into the appropriate outlet.
The unit is plugged into a switched
electrical outlet.
Plug the power cord into an unswitched outlet.
Universal Pulse Controller is inoperable.
Contact your maintenance person or Authorized
Service Agency.
Transformer is defective.
No water comes out of the
filter system.
Inlet/Outlet Ball Valves closed.
Open the Inlet/Outlet Ball Valves.
System depressurized.
Pressurize system.
Drain Valve is stuck open.
Clean, rebuild, and/or replace the Drain Valve.
Rinse Ball Valve is open.
Close the Rinse Ball Valve.
The system may be in a flush cycle.
Wait for the flush cycle to end.
Inlet Strainer (if installed) is plugged.
Clean or replace Inlet Strainer
Ultra Filter Cartridge is plugged.
Replace Ultra Filter Cartridge.
Carbon Element is plugged.
Replace Carbon Element.
Low water flow comes out of the
filter system.
See above.
See above.
The inlet water pressure is too low.
Boost the inlet water pressure.
The outlet check valve may be plugged
or defective.
Clean or replace the outlet check valve
assembly.
The inlet flow restrictor may be plugged.
Clean or replace the inlet flow restrictor.
Water tastes bad.
Carbon Element need replacing.
Replace Carbon Element.
Storage/shipping solution not completely
rinsed out of the system.
Rinse the system for a longer period of time;
replace Carbon Element.
Biological growth in pipes.
Sanitize plumbing.
Water condition changed.
Consider installing additional filtration.
Broken capillaries in Ultra Filter
Cartridge.
Replace Ultra Filter Cartridge.
Flush runs continuously.
Drain Valve stuck open.
Clean, rebuild, or replace the Drain Valve.
Controller sending continuous signals to
valve.
Replace the controller.
Water splashes at drain during
flush.
Drain line not positioned properly.
Reposition the end of the drain line.
Drain not capable of handling high flow
rate.
Clean drain; find alternate drain.
Water leaks at ends of the Ultra
Filter cartridge after changing
cartridge.
O-rings are not lubricated.
Lubricate O-rings with food grade lubricant.
O-rings are split, cut, or twisted.
Replace O-rings.
Ultra Filter Housing clamps and hardware
not properly secured
Tighten Ultra Filter Housing Clamps or replace.
Water leaks from Carbon or TAC
bowls.
O-rings are not lubricated.
Lubricate O-rings with food grade lubricant.
O-rings are split, cut, or twisted.
Replace O-rings.
Water leaks from system
fitting or connection.
Fitting broken or loose.
Tighten or replace the fitting.
Not enough pipe thread sealant used.
Redo the fitting with the proper amount of
sealant.
Troubleshooting
