TM9-4120-400-14
4-46.
SOLENOID VALVE (COIL). - contlnued
Figure 4-41. Solenoid Valve (Coil)
NOTE
The following basic instructions apply to both the by-pass solenoid L1 and the pressure
equalizer solenoid L2.
TESTING
1. Disconnect the solenoid valve connector plug (1). (P8 for L1 solenoid and P9 for L2 solenoid.)
2. Check for continuity between pins A and B in connector plug (1). If continuity is not found, the coil (4) is open
and must be replaced.
3. Check for continuity between each pin in connector plug (1) and coil (4) casing. If continuity is found the coil is
grounded and should be replaced.
4. If continuity checks are satisfactory, apply 28 volts dc from an external power supply across pins A and B in
connector plug. 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, Notify supervisor.
REPAIR
The only authorized repair to solenoid valve is coil replacement. The coil can be replaced without opening the
refrigeration pressure system.
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