:
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
27
DIAGNOSIS AND SOLUTION (CONT)
Indoor and outdoor unit communication error
(EL01)
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.
Fig. 20 — Multimeter
• 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.
Fig. 21 — Multimeter
