_________________________________________________Chapter 4 – Smoke Control Section, Page 4-51
Wash System – Troubleshooting (Cont.)
Water Solenoid Valve (Cont.)
If solenoid valve sticking is a recurring problem, it indicates that foreign material in the water supply line is
escaping through the line strainer located in the Wash Control Cabinet. The screen in the line strainer
should be removed, checked for holes, and cleaned. For instruction, refer to Page 4-48.
Solenoid Valve Not Opening
If a Solenoid Valve does not open when the system is placed into a Wash Cycle perform the following:
1.
Check to see if there is electrical power at the solenoid coil. If there is no power refer to the specific
Technical Manual for your Command Center, the Troubleshooting Section.
2.
If there is power it indicates that the Solenoid is burned out. To replace the Solenoid proceed as
follows:
Danger: Always shut off electrical power when repairing electrical controls. Contact with unsecured
power will result in immediate injury or death to personnel.
a)
Shut off electric power to the Wash Control Cabinet.
b)
Open the junction box next to the Solenoid Valve and disconnect the valve wires.
c)
Lift up the tab on the Solenoid Retainer and slide the retainer off (Refer to Figure 4-51-1)
d)
Slide the Solenoid Coil off the coil stem.
e)
Pull the wires out of the conduit going to the junction box.
f)
Slide the wires from the new Solenoid through the conduit and into the junction box and connect
the wires.
g)
Slide the new Solenoid onto the coil stem.
h)
Install the Solenoid Retainer.
Valve Housing
Solenoid
Retainer
Figure 4-51-1
Water Solenoid Valve
