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Locate and test the 6.8k Ohm resistor on the main control PCB. If the resistor is out of
range, replace it, otherwise replace the main control PCB.
Power down the heat pump, and locate the resistor.
Verify it is secured to the main control PCB. IF not,
secure the resistor and retest. IF secured, proceed to
step 2B.
Measure the resistor, verifying 6.8k ohms (+/-.5). IF the
resistance is correct, replace the main control PCB
(HPXMCB50). IF incorrect, replace the 6.8k ohm resistor
(Field Supplied).
Power Down & Locate Resistor
Step 2A
Step 2B
Measure Resistance
2. Error Code: P07
NOTE: 6.8k ohm resistor is not reading with +/-.5, then
replace it with a locally sourced 6.8k ohm resistor.
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