Maytag MWF4200AWS Technical Information download pdf (Page 87)

5-37

Problem/Situation Correction/Action

After the test the tap does not work

properly.

Be sure the inlet and outlet valves were reopened. Leave the tap

on for a few minutes to allow water flow to return to normal.

Water is leaking from the System

when cap is removed.

Tighten the cap again to prevent more water from leaking. Drain

the System further by pushing the flush button on the controller.

Then remove the cap.

Controller does not zero properly. Open the John Guest valve.

Can not remove the cap. Be sure the inlet valve is closed. Drain the System.

Integrity tester is hooked up to drain

solenoid and System needs to be

drained.

Be sure the inlet valve is closed. Hold down the flush button on

the Integrity tester for approximately 20 seconds to drain the

System. Drain solenoid will open for the duration that the button

is held down.

NOTE: If there is a failure, most of the time it is due to a System leak from hoses, connections or

valves. Be sure to; replace the cap, turn on inlet valve half way to minimize air in the System,

after air has escaped through air vent turn on outlet valve, and run tap for a few minutes to

release pressure prior to repeating the test.

5.5.5 Sanitize System

During this procedure, DO NOT open the Bypass Valves, as this will allow potentially contaminated

water into the household distribution system. Contaminated water may lead to personal injury and/or

death.

Chlorine bleach must be in the house for less than 3 months. The active percentage reduces with time.

This does not disinfect all of the household pipes. If on a lake or well, it is strongly recommended that

all of the pipes are sanitized as water will be previously microbially unsafe

NOTE: Water level prior to pouring chlorine bleach into the System should still be at 2” above the

bottom of the prefilter cavity from the Integrity test. This is very important so as not to damage

the System. If the water level is too low, open the inlet valve slowly for about 30 seconds to raise

the water level.

Step 1- With the System Cap off (and internal

prefilter still removed), ensure the water level in

the internal prefilter cavity is well above the

internal prefilter spigot. Pour in 250mL of 12%

chlorine bleach OR 500mL of 5% or 6%

household chlorine bleach into the top of the

System. Let stand 15 minutes.

Step 2 – Use the controller to activate the drain

solenoid in order to drain the System. See section

5.4.7.3 for base controller and 5.4.8.3 for advanced

controller.

Advanced

Controller

Base Controller

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