Troubleshooting Microphor LF-220



Problems Cause Remedy  
Water drains from bowl Nicks or obstructions on Flapperseat. Replace Flapper, Service Kit P/N 90066-3.  
Insufficient Flapper tension See Flapper Adjustment    
Flapper seal worn or damaged. Replace Flapper -Kit 90066-3    
Water level too high. Water level control out of adjustment. Turn Level Adjustment 1/8 turn at a time toraise or lower water level; Clockwise to raise,Counterclockwise to lower.  
Fluctuating water pressure Regulate water pressure.    
Timer malfunction. Replace Timer -Reference Timer Drawing    
Water continues to run. Obstruction in water Solenoid Valve. Remove and inspect Solenoid Valve-see Solenoid Valve Cleaning  
Toilet continues to cycle after initial flushcycle is complete -oronly partially cycles. A cracked cam. Replace Cam-reference Flapper Adjustment Drawing  
Defective Cam Switch; switch outof adjustment. Adjust or replace Cam Switch-reference Flapper Adjustment Drawing    
Defective Timer Disconnect either purple wire at limit switch.If toilet continues to cycle, the timer isdefective. If the toilet stops cycling, the limitswitch either is not adjusted properly or isfaulty.    
Water leaking onfloor. The hopper has been jarred loosefrom the bowl. Reseal Hopper -see Hopper Removal/Reseal  
Defective wax ring at toilet to floorconnection. Replace the wax ring.    
Loose water supply connection attoilet. Disconnect water line to toilet, add Teflon tapeto threads, reconnect.    
No water. Water turned off. Turn water on.  
Water inlet filter screen clogged. Clean water inlet filter screen.    
No power to valve. Check for DC power at Solenoid Valve duringflush cycle.    
Defective Timer. Check Timer operation -replace if necessary.    
Toilet doesn't activate. No power. Restore power.  
Tripped Circuit Breaker. Reset Circuit Breaker Switch. Determine cause of tripped breaker if possible beforeoperating toilet.    
Disconnected wires. Check all wiring connections.    
Water is visible at Vacuum Breaker when flushed. Insufficient lubrication;Worn vacuum breaker seal. Service Vacuum Breaker, Kit P/N 95037.  

Service Procedures

Before performing any service procedures, turn off water and electrical power to toilet.

Flapper Adjustment

Flapper Replacement Kit, P/N 90066-3

1 Remove toilet from floor. Locate flapper operating linkage on the side of the hopper.

2 Remove the clevis pin retaining ring. Remove clevis pin.

3 Adjust as necessary by turning the 3/8" set screw inside the clevis as required, then replace the clevis pin and retaining ring. Turn clockwise to increase flapper seal tension, counterclockwise to decrease. Inspect the crank arm, clevis and clevis pin for wear; replace if required. Do not turn bolt more than three (3) complete turns.

Flapper Adjustment

To Change Flapper Gasket

1. Turn water and air off.

2. Reach behind flapper to grasp gasket tails.

3. Pull tails out of slots to remove old gasket.

4. Installation is the reverse of removal.

5. Tails must be pulled all the way through to insure smooth surface.


Solenoid Valve Cleaning

Solenoid Service Kit, P/N 40037

1 Disconnect the power by removing the two blue wires from the solenoid.

2 Disconnect the water supply line at china end.

3 Remove two screws securing the solenoid to the mounting bracket.

4 Pull solenoid away from the Vacuum Breaker.

5 Remove water supply tube.

6 Remove four (4) screws from Solenoid Valve Body and remove spring and diaphragm.

7 Clean holes in the diaphragm if clogged. Inspect solenoid for debris and clean. Reassemble in reverse order.


Hopper Removal and Resealing

Hopper Replacement Kit, P/N 24770-3

1 Remove toilet from the floor. Place toilet upside down on a sheet of cardboard or other padded material.

2 Remove J-bolts nuts from hopper sides - lift the hopper off.

3 Remove quad ring between hopper and seal adaptor. Check that the quad ring is not damaged, replace quad ring if necessary.

4 Reassemble in reverse order.

Hopper Installation

Vacuum Breaker Service

Vacuum Breaker Service Kit, P/N 95037

1 If water is visible at the top of the vacuum breaker during operation, apply some silicone lubricant to the underside of the white float and to the O-Ring located at the upper end of the body.

2 To disassemble the vacuum breaker, remove the snap-on cap and unscrew body from the bracket. The white float inside can now be removed.

3 No service procedures are required for the lower portion of the vacuum breaker.

Vacuum Breaker

© Barry Brideau 2003-2018