Indoor And Outdoor Unit Communication Error - Midea DLFSHB Manual

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DIAGNOSIS AND SOLUTION (CONT)

Indoor and outdoor unit communication error

Remarks:
• Use a multimeter to test the DC voltage between the outdoor unit's 2 port and 3 port. The red pin of multimeter connects with the 2 port
while the black pin is for 3 port.
• When the air conditioner is normal running, the voltage is moving alternately as positive values and negative values.
• If the outdoor unit has a malfunction, the voltage has always been the positive value.
• If the indoor unit has malfunction, the voltage is a fixed value.
• Use a multimeter to test the resistance of the reactor that does not connect with the capacitor.
• The normal value should be around zero ohm, otherwise the reactor has malfunctioned.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
(EL01)
Fig. 20 — Multimeter
Fig. 21 — Multimeter
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