MAXA BDS28A, Техническое руководство

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8.4.1.2 Indoor fan does not operate (H6 Malfunction)
Possible causes:
1. Fan motor is locked;
2. The feedback terminal of PG motor is not connected tightly;
3. The control terminal of PG motor is not connected tightly;
4. Motor is damaged;
5. Malfunction of the rotation speed detection circuit of the mainboard.
See the flow chart below:
“ H6 ” is displayed on the unit.
Stir the fan blade with a hand when
the unit is DE-ENERGIZED.
Does the blade rotate smoothly?
Reinstall the motor and the blade
to make it rotate smoothly.
Is the malfunction eliminated?
Is the wiring terminal of PG motor loose?
Energize and retart up the unit, test if the
voltage between motor terminal 1 and 2 is
280
~ 310VDC
Test if the voltage between motor
terminal 2 and 3 is 15VDC
It’s the malfunction of the
motor. Replace the motor
Insert the wiring terminal of indoor fan
Is the malfunction eliminated?
It’s the malfunction of the main
board. Replace the main board
with the same model
Is the malfunction eliminated?
Is the malfunction eliminated?
End
Yes
No
Yes
No
Yes
No
No
No
Yes
No
Yes
Yes
Yes
Yes
No
No
It’s the malfunction of the main
board. Replace the main board
with the same model