COIL (SOLENOID VALVE) MAINTENANCE

TM 9-4120-430-14

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UNIT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

COIL (SOLENOID VALVE) MAINTENANCE

TEST, REMOVAL, AND INSTALLATION

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)

Test Equipment

Multimeter

References

Wire list and Schematic Diagram (WP 0038 00)

Personnel Required

One

Equipment Condition

Power disconnected from unit.

Top cover removed (WP 0018 00).

WARNING

Ensure power source is disconnected.

TEST

1. Using multimeter set on the lowest OHMS scale, check for continuity between leads of coil. If continuity is not

found, coil is open and must be replaced.

2. Using multimeter set on lowest OHMS scale, check for continuity between each lead and coil casing. If continuity is

found between either lead and the casing, the coil is grounded and must be replaced.

REMOVAL

1. Tag and disconnect wires connected for solenoid valve coil (3). See figure 1.

2. Remove screw (1) and star washer (2).

3. Slide solenoid coil (3) off stem of solenoid valve (4).

INSTALLATION

1. Slide solenoid coil (3) onto valve stem of solenoid valve (4) and secure with star washer (2) and screw (1).

2. Refer to wire tags installed during removal and reconnect wires of coil as indicated and then remove tags.

3. Install top cover. See WP 0018 00.

4. Reconnect air conditioner to power source.

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