Blank Display/Indoor Unit Door Micro Switch - Friedrich FPHMR18A3A Service Manual

TROUBLESHOOTING

Blank Display/Indoor Unit Door Micro Switch

If the Display is blank, check to see if the door is properly closed.
If the door is properly closed, confirm that you have proper line voltage to the indoor unit.
If the indoor unit door is not properly closed, or if the door micro switch has malfunctioned the display may be blank. See Figure 702
When the micro‑switch is not engaged, and the power button is depressed, there will be no display and the system will not operate
or respond in any way. See Figure 703.
When the Timer On/Clock button is pressed you will see a temperature on the display, but still no system operation. After a few
seconds, the display will drop the temperature leaving just the Wi‑Fi and Timer icons. Still no indoor unit operation. See Figure 704.
Fig. 702 (Door Micro Switch)
Fig. 703 (Blank Display)
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