PRESSURE EQUALIZING SOLENOID VALVE (L2) .

TM 5-4120-369-14

LIQUID LINE SOLENOID VALVE (L-1) - Continued.

4-38.

Inspection.

REFRIGERANT UNDER PRESSURE

is used in this equipment Organizational personnel

are not authorized to open the pressurized system.

HIGH VOLTAGE

is used in the operation of this equipment.

DEATH ON CONTACT

or severe injury may result if personnel fail to

observe safety precautions. Always disconnect

the air conditioner from power source before per-

forming maintenance on this equipment. If power

must remain on for troubleshooting, exercise

extreme care to avoid contact with any electrical

component, fan, fan motor, etc. Do not operate

the air conditioner without louvers, top controls,

and guards in place and tightly secured.

(1) Refer to para 4-18 and remove top covers.

(2) Remove valve cover and inspect coil for cracks, breaks, loose connect ions, frayed

wires or other defects.

(3) Report any defects to Direct Support maintenance.

Using a multimeter, test across the valve leads for continuity at connector

Test.

P-8, pins A and B. If no continuity is indicated , 'the coil may be defective. Report to Direct

Support maintenance for replacement.

PRESSURE EQUALIZING SOLENOID VALVE (L2) .

General. The normally-open equalizing solenoid valve is electrically closed when the

mode selector is turned to COOL. When power is switched from the solenoid coil the valve opens,

equalizing the high side to low side pressure.

Inspect.

(1) Refer to para 4-18 and remove top covers.

(2) Remove the valve cover and inspect coil for cracks, breaks, loose connections,

frayed wires or other defects.

(3) During the cooling cycle, inspect the compressor suction line. If it feels hot, the

pressure equalizing solenoid valve is defective.

(4) Report all defects to Direct Support maintenance.

Test.

Test the pressure equalizing solenoid valve for continuity across electrical

leads-at connector P-9 pins A and B, with a multimeter. If no continuity is indicated, the valve

is defective and should be replaced. Report all defects to Direct Support maintenance.

4-47