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An Error Code: E01 relates to a problem detected on the high refrigerant pressure side.
This could be caused by a problem with the pressure switch, pressure switch wiring,
control board PCB, the water supply, the filter dryer, or the Heat Pumps refrigerant
charge.
To isolate an E01 error, first verify whether the error
clears when the heat pump is not running. IF the error
clears, go to 3D. IF the error does not clear, jump to
step 3B.
Power down heat pump, disconnect high pressure
switch wires & measure switch for resistance. IF
resistance is identified, replace switch (HPX2001-3605).
IF no resistance, go to step 3C.
Does Error Clear?
Step 3A
Step 3B
Power Down & Test Pressure Switch
3. Error Code: E01
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