Hayward HP50A - Does Error Clear?; Verify Low Pressure Side

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While the heat pump is in its dormant (not running) state, the low side pressure
should read at least 25PSI.
To isolate an E02 error, first verify whether the error
clears when the heat pump is not running. IF the error
does not clear, go to 4B. IF error clears, jump ahead to
step 4F.
Attach low pressure manifold gauge. With the heat
pump OFF, verify the pressure is above 25PSI. IF the
pressure is below 25PSI, go to 4C. IF above 25PSI, jump
ahead to step 4D.
Step 4A
Step 4B
Verify Low Pressure Side
4. Error Code: E02
Does Error Clear?
NOTE: A pressure gauge adaptor (1/4” male SAE to 5/16”
female SAE) must be field supplied to test the high and
low pressure manifolds.