MALFUNCTION 6

TM 9-4120-428-14

0010 00

There is no continuity in the pins.

CORRECTIVE ACTION

Test the compressor motor by checking the continuity of the following pins, at

the compressor electrical receptacle. (WP 0016 00) and (WP 0090 00).

Continuity should exist in pins A and B, B and C, and C and A.

b) Continuity should NOT exist in pins A, B, and C, and the compressor

housing.

c) In pins D and E, continuity should exist when the compressor is cool

enough for the internal thermostat to be closed. If the compressor is hot, let

it cool down and then retest.

MALFUNCTION 6

COMPRESSOR SHORT CYCLES

SYMPTOM

The compressor short cycles.

MALFUNCTION

There are obstructions in front of the condenser screen.

CORRECTIVE ACTION

Remove any obstructions and/or roll up and secure the canvas cover.

There is dirt inside the condenser coil.

CORRECTIVE ACTION

Clean the condenser coil if necessary. (WP 0057 00).

The HIGH PRESSURE cutout switch and RESET is tripped.

CORRECTIVE ACTION

RESET the switch, then push and release the HIGH PRESSURE switch.

The LOW PRESSURE cutout switch is tripped.

CORRECTIVE ACTION

RESET the LOW PRESSURE switch, then push and release the LOW PRESSURE

switch.

MALFUNCTION 7

COMPRESSOR STARTS THEN STOPS DURING OPERATION

SYMPTOM

Compressor Starts, then goes out on overload.

MALFUNCTION

The condenser fan motor experiences a failure.

CORRECTIVE ACTION

Observe the condenser fan motor for failure and replace the motor if necessary.

The condenser coil or guard is dirty.

CORRECTIVE ACTION

Clean the coil and/or the guard.

The air outlet louvers are stuck or jammed in a closed position.

0010 00-5