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Fig. 35 – DC voltage test
Fig. 36 – Reactor resistance test
Remark
Use a multimeter to test the DC voltage between the L2 port and S
ports of the outdoor unit. (Fig. 35) The red pin of multimeter
connects with the L2 port while the black pin is for the S port.
When the AC is running normally, the voltage will move
alternatively between - 50V to 50V.
If the outdoor unit has a malfunction, the voltage will move
alternatively with a positive value.
If the indoor unit has a malfunction, the voltage will be a certain
value. Example: 10 - 13VDC small fluctuating amounts indicates
indoor unit malfunction.
Remark
Use a multimeter to test the resistance of the reactor which does not
connect with the capacitor (Fig. 36).
The normal values should be around zero ohm.
Otherwise, the reactor must has a malfunction and must be
replaced.
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