Amana Heat Pumps PMH074

Remove the two mounting screws, one on each side of the control board cover

Tilt the control panel out and disconnect ribbon connector from control board

Disconnect all wiring to the control board

Label the wires to ensure proper reassembly

WARNING: NEVER TEST OPERATION WITHOUT THE UNIT IN THE WALL SLEEVE

Describe any changes in design specifications for air movement

Ensure the unit is installed in the wall sleeve

Cooling Performance Test Thermometers

Secure thermometers in proper locations

Observe thermometer readings without touching or moving them

Remove the two mounting screws from the control board cover

Tilt the control panel out and disconnect ribbon connector from control board

Remove the two screws securing the top screen to the evaporator assembly

Remove screws on mid partition panel and shift out of the way

Remove the two screws securing the heater assembly to the evaporator

Pull heater assembly up and out of the chassis

Disconnect all wiring to the heater assembly and remove the assembly

Disconnect all power sources before servicing or installing the unit

Measure the voltage across terminals L1 and L2 of the outlet using a voltmeter

Is there a voltage reading across terminals L1 and L2?

Identify possible issues if no voltage reading is present

Describe the repairs needed if any issues are identified

Record dry bulb temperature of return air at conditioner (Step A)

Record dry bulb temperature of air leaving conditioner (Step B)

Ensure dry bulb thermometer temperature on sling psychrometer is within ±1°F of return air thermometer reading (Step C)

Record wet bulb temperature on sling psychrometer

Temperature Difference Calculation

Calculate temperature difference by subtracting Step B from Step A

Use Cooling Range Chart to determine cooling range based on calculated temperature difference