Specifications

TO PROBE
LEVEL CONTROL PROBE
K355Q [K402A & P410A]
L398C [120V]
L399C [240V]
SS WATER LEVEL CONTROL CCA
FLOAT SWITCH
(70 V.A) L499A
CORRECT
POSITION OF
MAGNETS
GROUNDING PLATE IN
BACK OF THE BOARD
GROUND
TERMINAL
CRITICAL COMPONENTS TESTS
A) Water Inlet Valve Test
Check hot water side, going to tank: 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 electrical 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 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.
Check cold water side, going to dilution nozzle: Turn power off. If water
keeps coming out of the dilution nozzle, the solenoid might be clogged or
damaged.
A Check Valve should be provided and installed by the customer 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.
TO
SOLENOID
L1
N
1
2
3
4
T5
BACKFLOW PREVENTION
CHECK VALVE
PROVIDED AND INSTALLED
BY CUSTOMER
15
15