Graco 334130A, Instructions-Parts List Manual

Page: 56 / 108

Repair
Replace Transformer
See Fig 35, page 57 .
1. Turn the main power switch off.
2. Open electrical enclosure door.
3. Disconnect incoming power harness (234) from
top of transformer (235).
4. Disconnect transformer (235) output power
harness wires (RCD-W1, -W2, -W3, -W4) from
RCD-1.
5. Disconnect transformer (235) ground wire from
the back panel ground lug.
6. Disconnect the red (+) and black (-) wire of fan
from pins 4 and 3 of J7 connector on AWB (205).
Disconnect J7 connector from AWB.
7. Cut wire zip ties securing fan wires.
8. Remove flanged nuts (N) and transformer (235)
from the back panel (201).
9. Install transformer (235) onto mounting studs on
back panel (201) and secure with flanged nuts
(N).
10. Insert thermal sensor connector from transformer
(235) onto J7 connector on AWB (205).
11. Reconnect red (+) wire from fan into pin 4 and
the black (-) wire into pin 3 of J7 connector.
12. Install transformer (235) ground wire onto ground
lug of back panel (201).
13. Connect transformer output power harness (234)
to power terminal connections. Torque to 25–27
in-lbs (2.8–3.1 N•m).
Table 11 Transformer Output Power Harness
Connections
Power Harness Wires RCD-1 Connections
RCD-W1
Terminal N
RCD-W2 Terminal 5
RCD-W3 Terminal 3
RCD-W4 Terminal 1
14. Install incoming power harness (234) to top of
transformer in voltage port specified on machine
serial number label.
15. Verify all electrical connections, including earth
grounds, are compete and tight. All connections
and plugs must be connected prior to applying
power.
16. Close the electrical control panel door.
17. Apply power to the machine. Turn on the main
power switch.
18. Restart the system.
56 334130A