TEST AND INSPECTION - TM-9-4120-423-14-P0420

TM9-4120-423-14&P

Slip the coil assembly and data plate on to the body tube and plunger assembly.

Using wrench, secure the coil with a nut.

Connect leads to disconnect splices.

TEST AND INSPECTION

WARNING

Disconnect input power from the air conditioner before performing maintenance on any

part of the electrical system. The voltages used can be lethal. Shutting the unit off at the

control module does not disconnect power to the various components of the air

conditioner.

NOTE

The following basic instructions apply to both the equalizing solenoid L1 and the liquid

line solenoid L2.

Disconnect the solenoid valve leads at the quick disconnect terminals.

Use multimeter set on the lowest ohms scale to check for resistance between leads. If resistance

is not between 40 and 70 ohms, the coil is bad and must be replaced.

Use multimeter to check for continuity between each lead and the coil casing. If continuity is

found between either lead and the case, the coil is grounded and should be replaced.

If resistance checks are satisfactory, apply 24 volts dc from an external power supply across the

leads and listen for a sharp click when the valve changes position. If a click is not heard, internal

valve problems are indicated and the entire valve should be replaced.

INSTALLATION

Disassemble all removable components from the new valve.

NOTE

Step (2) applies only to the L1 solenoid valve.

Install the flush bushings in the valve body.

Position the valve body in the unit. See arrow on valve body for proper installation.

Purge system with nitrogen and braze joints. See WP0071 and WP0072.

0093 00-4