Electronic Control Check; Continuity Checks - Graco SuperCat 232096 Instruction Manual

Electronic Control Check

Problem
Keypad display and schematic
blank
Keypad fails continuity checks.
Schematic lights fail continuity
checks.
Keypad display and schematic
blink
Keypad display shows 8 2.02*
* or current software revision.
See setup level 7.

Continuity Checks

Follow the procedure on page 86 to access the circuit
board, keypad, or schematic panel ribbons to conduct
the continuity tests. Be sure to put on the ground strap
provided before checking continuity.
Use an ohmmeter to check continuity on the ribbon
cable for the desired light or key. Refer to the following
charts and Fig. 92 for the associated pin numbers and
locations.
SCHEMATIC PANEL KEY AND LIGHT CONTINUITY CHECKS
NOTE: The keys use the small ribbon (A). The lights use the large ribbon (B). Refer to Fig. 92.
Continuity Check
Feed Pump A Light
Feed Pump B Light
Full Level Reservoir A Light
Full Level Reservoir B Light
Low Level Reservoir A Light
Low Level Reservoir B Light
Low Pressure A Light
Low Pressure B Light
Premier Runaway Light
Material A Usage Light
Material B Usage Light
Troubleshooting
Operating Condition
Red Green
2 and 10
2 and 14
2 and 5 2 and 6
1 and 17 1 and 18
2 and 7 2 and 8
1 and 19 1 and 20
2 and 11 2 and 12
2 and 15 2 and 16
2 and 3 2 and 4
1 and 21 1 and 22
1 and 23 1 and 24
Cause/Solution
Open system air supply (red handle
ball valve). Check air supply pressure
and volume.
Clean main air filter.
Clean power supply filter.
Replace power supply. See Service,
page 92.
Replace keypad. See Service, page
86.
Replace schematic panel. See Ser-
vice, page 86.
Air supply volume too low. Increase
air volume.
Air supply pressure too high. Do not
exceed 100 psi (0.7 MPa, 7 bar).
Air supply volume too low. Increase
air volume.
NOTE:
When closed, the keys should have less than 100
ohms resistance.
Check the lights for continuity with the leads touch-
ing the pins one way then reverse polarity. If there
is no continuity reading with either check, the lights
are bad and the entire part needs to be replaced.
Continuity Check
High Pressure A Light
High Pressure B Light
Work Life Time Light
Solvent Runaway Light
Temperature A Light
Temperature B Light
Feed Pump A Key
Feed Pump B Key
Premier Pump Key
Solvent Pump Key
Red Green
1 and 26
1 and 28
1 and 29 1 and 30
1 and 31 1 and 32
2 and 9 2 and 13
1 and 25 1 and 27
1 and 3
1 and 4
1 and 2
1 and 5