Pages from 03-30ACR-2_2023-05-11_08-38-07.pdf

NAVAIR 03−30ACR−2

8. TEST PROCEDURE.

Ensure pin C of test circuit and casing of unit under test are properly grounded.

Failure to ensure proper grounding of valve casing could create an electrical shock hazard.

a. Fabricate test circuit or equivalent as shown in figure 4. Connect test circuit mating connector to valve.

b. Apply air at 120 psig to inlet port. Using test circuit, energize pin A of connector (18) from a 115 volts, single−phase, 400 cycle, ac power source. The output shaft shall rotate clockwise, opening the valve within 5 to 7 seconds. The indicator on plate (2) shall indicate OPEN. Motor current shall not exceed 0.35 amperes during operation. Check for continuity between pins A and D.

NOTE

If high voltage is found across connector pins D and C, replace clockwise limit switch and repeat step b.

c. Using test circuit, energize pin B. The output shaft shall rotate counterclockwise, closing the valve within 5 to 7 seconds. The indicator on plate (2) shall indicate CLOSED. Motor current shall not exceed 0.35 amperes during operation. Check for continuity between pins B and E.

NOTE

If high voltage is found across connector pins E and C, replace counter−clockwise limit switch and repeat step c.

d. Open valve, remove power, and disconnect connector from valve. Check for continuity between pins A and D. Resistance should be less than 1 ohm. Check for continuity between pins B and E.

Resistance should be infinity. Reconnect connector to valve, apply power, and close valve. Remove power and disconnect connector from valve. Check for continuity between pins A and D. Resistance should be infinity. Check for continuity between pins B and E. Resistance should be less than 1 ohm.

e. With valve closed, apply air at 120 psig to inlet port. Internal leakage shall not exceed 0.25 cubic feet per minute.

f. In case of unit malfunction, consult Table 1 for cause and remedial action.

Figure 1. Wiring Diagram

001002

Figure 2. Preliminary Actuator Settings

001003

Figure 3. Actuation Limits

TABLE 1. TROUBLESHOOTING

TROUBLE PROBABLE CAUSE REMEDY

Unit inoperative. Incorrect wiring Repair wiring.

Defective switch assemblies (52, 53 figure 5)

Replace switch assemblies.

Defective motor (21). Replace defective part.

Current exceeds 0.35 amperes during operation.

Damaged slide (72). Replace slide.

Binding gear train. Replace damaged parts.

Defective motor (21). Replace defective part.

Internal leakage exceeds 0.25 cubic feet per minute.

Slide (72) not fully closed. Reset switch assemblies (52, 53)

Defective gasket (5) Replace gasket.

Defective seating surface on fittings (3, 4). Replace fitting.

Defective slide (72). Replace slide.

NOTE

This publication reflects the listing of parts kits. Such listings are intended to provide information concerning replacement parts usable at major overhaul and minor repair. Certain replacement parts are stocked only in kits. Standard parts and parts having multi−application are stocked in their appropriate classes and may also be stocked in kits.

C

E

B

A

D

MS3456W14−5S PLUG

POWER FROM

115 VOLT

400 HZ

SINGLE PHASE

SOURCE

TEST POINT

BLACK−OPEN

TEST POINT

RED−OPEN

OPEN

CLOSE

TEST POINT

BLACK−CLOSED

TEST POINT

RED−CLOSED

NOTE: ALL WIRES SHALL BE AT LEAST 20 AWG

PER MIL−W−22759.

SWITCH S1 SHALL BE SINGLE−POLE,

DOUBLE THROW.

S1

001004

Figure 4. Inducer Valve Test Circuit