Solenoid / Water Valves (Inlet Valve) - Ffle3911Qw And Fflg4033Qw; General Characteristics; Operating Principle; Mechanical Jamming Of The Solenoid Valve - Frigidaire FFLE3911QW Technical & Service Manual

9.14 Solenoid / Water Valves
(Inlet Valve) - FFLE3911QW and
FFLG4033QW

9.14.1 General Characteristics

This component fills water into the detergent dispenser and
is controlled electrically by the Main Control Board via Triac.
The level of water in the tub is controlled by the Pressure
Sensor.
1. Water inlet
2. Solenoid valve body
3. Filter or needle trap
4. Flow reducer
5. Coil
6. Spring
7. Moving core
8. Rubber
9. Membrane
10. Water outlet
NOTE
Model FFLG4033QW Washer unit has 3 coil (hot water, cold water, and softener) Solenoid Valve.
Model FFLE3911QW Washer unit has 2 coil (hot water and cold water) Solenoid Valve.

9.14.2 Operating Principle

When idle, the core pushed by a spring, keeps the central
hole of the membrane closed and so the latter hermetically
seals access to the water inlet duct. When the coil is
powered, the core is attracted, releasing the central hole of
the membrane. Consequently the valve opens.
9.14.3 Mechanical jamming of
the Solenoid Valve
The Solenoid Valve may jam or open without being actuated
(which will cause flooding if the Pressure Sensor controlling
the water level does not trip). If this occurs, the electronic
control system (which continuously monitors the flow
sensor) will lock the door, start the Drain Pump and display
an ALARM, simultaneously.

9.14.4 Low Water Pressure

The Flow Sensor may not generate a signal during the
water fill phases, even though power is being supplied to the
Solenoid Valve. This condition may result due to a closed
water tap or clogged filter on the Solenoid Valve (with
ensuing low water pressure). If this occurs, only a WARNING
will be displayed and the cycle will continue for 5 minutes,
after which an ALARM will be signalled.
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