Display Module - Graco Reactor H-25 Series Repair And Parts Manual

Display Module

Temperature and Pressure Displays
CAUTION
Before handling board, put on a static conductive
wrist strap to protect against static discharge which
can damage board. Follow instructions provided with
wrist strap.
1. Turn main power OFF
supply.
2. Relieve the pressure. See Pressure Relief
Procedure, page 26.
3. Refer to electrical diagrams.
4. Put on static conductive wrist strap.
5. Disconnect main display cable (20) at lower left
corner of display module; see F
6. Remove screws (509, 510) and cover (504); see
F . 13.
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NOTE: If replacing both displays, label temperature
display cables TEMP and pressure display cables
PUMP before disconnecting.
7. Disconnect cable connectors (506 and 511) from
back of temperature display (501) or pressure
display (502); see F
8. Disconnect ribbon cable(s) (R) from back of display;
see F . 13.
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9. Remove nuts (508) and plate (505).
10. Disassemble display, see detail in F
11. Replace board (501a or 502a) or membrane switch
(501b or 502b) as necessary.
12. Reassemble in reverse order, see F
medium strength thread sealant where shown. Be
sure display cable ground wire (G) is secured
312063Z
. Disconnect power
. 13.
IG
. 13.
IG
. 13.
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. 13. Apply
IG
between cable bushing and cover (504) with screws
(512).
Red Stop Button
CAUTION
Before handling board, put on a static conductive
wrist strap to protect against static discharge which
can damage board. Follow instructions provided with
wrist strap.
1. Turn main power OFF
supply.
2. Relieve the pressure. See Pressure Relief
Procedure, page 26.
3. Refer to electrical diagrams.
4. Put on static conductive wrist strap.
5. Remove screws (509, 510) and cover (504), F
13.
6. Disconnect button cable connectors (506) from back
of temperature display (501) and pressure display
(502).
7. Remove red stop button (506).
8. Reassemble in reverse order. Be sure display cable
ground wire (G) is secured between cable bushing
and cover (504) with screws (512).
Repair
. Disconnect power
.
IG
41