DM17-01.01.08en Light Commercial R410A on-off
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Lack of phase
Check the power supply, is it 3 phase,
Check the connection between power supply and terminal,
is the voltage in outdoor terminal is 3 phase, 380-415V?
Outdoor PCB is defective
Yes
Yes
(2) For the outdoor unit
a. Phase sequence error:
b. Lack of phase
Phase sequence error
Change the order of two of the wires to power supply.
Switch on the unit again.
If the problem cannot be solved, the outdoor PCB is defective
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