Service The Electrical Controls - Graco HydroShield Instructions Manual

Service the the Electrical Electrical Controls
Service Service the Electrical
Use the procedures in this section to service
components of the electrical controls as
needed. The procedures refer to the figures in
Electrical Schematics, page
Prepare the the Electrical Electrical Controls
Prepare Prepare the Electrical
1. Prepare the isolation system for service. Follow
of the steps in Prepare the Isolation System for
Service, page 93.
2. Remove power from the isolation system.
3. Use a flat blade screwdriver to open the isolation
cabinet door.
4. Loosen the cover screws (416) and remove the
cover (402).
5. Open the electrical control assembly.
Replace a a a Solenoid Solenoid Valve
Replace Replace Solenoid
1. Prepare the electrical controls for service. Follow
the steps in Prepare the Electrical Controls for
Service, page 109.
2. Remove the connector (433) from the color
change board (403).
3. Disconnect the solenoid wire.
4. Remove the solenoid valve (407) from the
manifold (406) by turning it counter clockwise.
5. Install a new solenoid. Lubricate the o-ring.
6. Reconnect the solenoid wire to connector
(433). Reinstall connector (433) on the color
change board (403). For location details, see
Electrical Schematics, page
7. Use Maintenance screens 3-6 to verify the
operation of the solenoid.
3A7370C
Controls
Controls
112.
Controls for for Service Service
Controls for Service
Valve
Valve
112.
Replace Replace a a a kV Replace kV Board kV Board Board
1. Prepare the electrical controls for service. Follow
the steps in Prepare the Electrical Controls for
Service, page 109.
2. Disconnect the wires from the kV board assembly
(428).
3. Pull the tab with a screw driver to release the
board from the DIN rail (436).
4. Install a new kV board assembly.
5. Snap the board on the DIN rail (436).
6. Reconnect the cable (445) as shown in
Electrical Schematics, page
7. Connect the wires to the kV board as shown in
Electrical Schematics, page
Repair
112.
112.
109