Specifications

T5
N
L1
4 3
2 1
A) Water Inlet Valve Test
Turn power off. If the water level rises inside the tank, the Water Inlet Valve is
leaking. Disconnect wires from the Water Inlet Valve coil and connect a 2 wire line
cord to the terminals. Plug it into a 115V outlet. If water flows in and stops when
you pull it out, the Valve is working fine. Repeat this test a few times. The
problem may be in the Probe or Water Level Control Board. If the water does not
flow in when the cord is plugged into an electrical outlet, the Solenoid coil may be
damaged, opened or the valve may have an obstruction preventing the water from
flowing in. Clean or replace it.
A Check Valve is installed to prevent backflow.
To check proper function of Check Valve, disconnect water line from the Check
Valve, check for dripping from the disconnected end of the Check Valve. If it leaks
replace it.
B) Hi-Level Float Switch Test
The Float Switch acts as a guardian for the Solid State Level Control Board
and its Probe. If they malfunction and cause the water inside the tank to rise, the
Float Switch will prevent flooding by terminating the power to the Solid State
Control Board and the Water Inlet Valve. The correct mounting position of the
Float Switch in the tank is as shown in picture, with the magnets in the Float
Switch in the upper part of the switch.
After tank is full, unplug the wire to the Level Control Probe,
the water should run into the tank for a few more seconds until it reaches the Float
Switch and it should stop.
If not, and water starts coming out of the Breather tube, the Float Switch is
malfunctioning.
C) Probe Test
If lack of water persists, check the probe as follows:
Turn on the power and water supply. Check inside the tank to make sure the
water is not touching the Probe. Pull wire and terminal out of the Probe rod. If
water still does not flow after the wire is disconnected from the Probe, the
problem may be in the Solid State Water Level Control Board.
If water starts flowing into the tank, the Probe may be grounded, due to excessive
liming. Check with Ohm meter. Clean or replace probe.
D) Solid State Water Level Control Board Test
Check the Board as follows:
1. Make sure there is power input to the Board at the terminals 2 & 3
Your voltmeter should read 115 Volts. It should read the same at terminals 1 & 3.
This is the output power to electrify the coil of the Solenoid Valve to open it.
The lack of voltage at terminals 2 & 4 will indicate that the Board is not working
properly.
2. Make sure all wire connections to the Board are tight.
3. The grounding plate at the top, in the back of the board should be securely
grounded. The Board will not work or will work erratically, if it is not grounded
properly. If after this, the Board is still failing to open the Water Inlet Valve,
replace it.
GROUNDING
PLATE IN
BACK OF THE
BOARD
GROUND
TERMINAL
SS WATER LEVEL CONTROL CCA
TO PROBE
LEVEL CONTROL PROBE K402Q
TO SOLENOID
L398C [120V]
L399C [240V]
CHECK VALVE ASSY L463A
HOSE NUT ASSY K491A
(was K178A)
WATER INLET VALVE (.5 gpm)
CD257 110 V, CD258 220 V
was L462A
FLOAT SWITCH
(70 V.A) L499A
CORRECT POSITION OF MAGNETS