TM 9-4110-256-14
4-43.
SOLENOID VALVE L2 (DEFROST LINE) TESTING AND REPAIR.
This task covers: a. Testing
b. Removal
c. Installation
INITIAL SETUP
Equipment Conditions:
General Safety Instructions:
Refrigeration unit shut down (para 2-7) and power
WARNING
disconnected.
Right side condenser door open.
High voltage and exposed rotating
parts are used in the refrigeration unit.
Materials / Parts:
Personal injury can result if power is
Marker tags (2)
connected.
7, Appendix E
a. Testing.
(1)
Tag and disconnect tabs (1).
(2)
Using multimeter set to measure continuity, check coil (2) continuity between tabs (1). Continuity should
be indicated. If no continuity was indicated, replace coil.
(3)
Using multimeter set to measure continuity, check coil (2) continuity between each tab (1) and coil (2)
metal case. No continuity should be indicated. If continuity was indicated, replace coil.
(4)
If no failure was indicated, check tabs (1) and tab housing (3). If damaged, repair or replace per paragraph
(5)
Using tags and wiring diagram (fig. 14), connect tabs (1). Remove tags.
NOTE
The only authorized repair to the solenoid valve is coil replacement. The coil can be replaced
without opening the refrigeration pressure system.
b. Removal.
WARNING
Do not attempt any disassembly of the solenoid valve other than coil removal with a refrigerant
charge in the system. Refrigerant will be sprayed out dangerously if the screws that attach the
tube and plunger assembly to the valve body are loosened.
(1)
Tag and disconnect tabs (1).
4-90
