MAXA BDS28A, Техническое руководство

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8.4.2.8 Power factor correction (PFC) fault (a fault of outdoor unit) (AP1 hereinafter refers to the control board of the
outdoor unit)
Main detection point:
● Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken?
The failure diagnosis is as follows:
Start
Check wiring of the reactor (L)
of the outdoor unit and the PFC
capacitor
Whether there is any damage or
short-circuit? Replace it as per the wiring diagram
and reconnect the wires. If the fault is
eliminated?
Remove the PFC capacitor and
measure resistance between
the two terminals.
Is the resistance around zero ?
Disconnect the terminals for the
reactor and measure the
resistance between the two
terminals of the reactor.
Whether there is any damage or
short-circuit?
Replace the control panel AP1
End
The capacitor is short circuited and
the capacitor should be replaced. Restart
the unit If the fault is
eliminated?
Replace the
reactor If the fault is
eliminated? Restart the
unit
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No