Repair
Replacing Solenoids
Follow this procedure to replace a single solenoid.
1.Remove User Interface cover. See page 16.
2.Disconnect two solenoid wires (V) from main board. FIG. 8.
3.Disconnect dispense valve pilot lines (A1, A2, B1, B2). FIG. 8.
4.Remove two screws (S).
5.Remove and replace solenoid (306b).
From left to right, solenoid functions are as follows:
•Component A
•Component B
6.Reassemble. Solenoid wires are polarized (red +, black
Replacing Alternator Regulator
1.Remove User Interface cover. See page 16.
2.Remove two screws (309) from the back of the con- trol box.
3.Disconnect supply and exhaust air lines (310). FIG. 5, page 19.
4.Disconnect solenoid wires 12 position Phoenix con- nector (306r) from main board.
5.Remove solenoid module (306) with regulator (306e). FIG. 8.
6.Unscrew and replace regulator (306e).
7.Reassemble. Refer to Electrical Schematic, page 22.
Make sure gaskets (306j, 306k) are in place when reinstalling solenoid module.
8. Set regulator to 24 psi (160 kPa, 1.6 bar).
Replacing Alarm
1.Remove User Interface cover. See page 16.
2.Disconnect alarm wires from main board.
3.Unscrew alarm (313) and replace. FIG. 5, page 19.
4.Reassemble. Refer to Electrical Schematic, page 22.
Dispense Valve | 1 | Set regulator pressure to 24 psi (160 kPa, 16 bar). |
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Pilot Lines |
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| 2 Safety relief valve (306t) is required on all IS units. |
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A1 (off), clear tube |
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A2 (on), black tube |
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B1 (off), green tube |
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B2 (on), red tube |
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| 306e 1 | ||
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| V |
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B1 |
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| A | B |
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A1 | B2 |
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A2 |
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| 306t | 2 |
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| 306k | 306j | B2 |
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| A2 | S | 306b | TI4558a |
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| A1 | B1 |
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FIG. 8
20 | 309909H |
