40
Solenoid Coil Test
The solenoid coil should be energized in the cool cycle (opening
the solenoid valve), and off in the heat cycle.
The coil can be tested by removing the coil from the valve and
sliding the coil over a screwdriver shaft. Turn unit on and adjust
setpoint up and down. You should feel the coil attract the screw-
driver in the cool cycle, and release in the heat cycle.
If the coil never turns on, either the coil is open or the control
voltage is missing. The coil can be tested for continuity using an
Ohmmeter. Turn the unit off. Unplug the coil from the wiring
harness and measure the coil resistance. It should be 750 - 850
Ohms.
Replacements are available as a coil only, or a coil assembly.
The assembly includes the electrical connector. Refer to the
parts list for part numbers.
If a coil is obtained locally, be sure it is type OMKC-1 and rated
for 208VAC. Do not substitute a DC coil.
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