Check High And Low Pressure Limit Switches - Friedrich VRP12K Service And Parts Manual

Check High and Low Pressure Limit Switches

1. Ensure power is removed from the unit.
2. At fmc board disconnect the orange (J8) and yellow (J7) wires.
3. The switches are wired together in series and if either switch is faulty you will get an error code 14.
4. Trace high pressure switch wires through grommet into upper cabinet and locate disconnect point.
5. Disconnect orange and blue wire.
6. Check orange to orange to check high pressure switch.
7. Check yellow to blue for low pressure switch.
8. An ohms reading of open indicates a faultyswitch.
Orange and Blue wries
from High Pressure
Switch
153
COMPONENTS TESTING
Figure 631 (Pressure Limit Switches)
Orange and Yellow wires
at FMC Board