MAXA BDLM26A2 - 8.2.3 H6 Malfunction

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8.2.3 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 tool when
the unit is DE-ENERGIZED.
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 on contral terminal
board for PG motor is more than 50V
within 1 min after the louvers are opened
Replace the mainboard
with the same model
Insert the wiring terminal of indoor fan
Is the motor startup
Replace the PG motor
Is the malfunction eliminated?
End
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Tighten the screw; reassemble the
blade, motor and shaft bearing rubber
base sub-assy to make sure there is no
foreign object between them
Is the malfunction eliminated?
No
Yes
No
Yes
Stir the fan blade by hand when
the unit is DE-ENERGIZED to see
if the blade rotate smoothly?
Yes
Is the malfunction eliminated?
No
Yes
No
Measure the voltage of this terminal
to neutral wire on the mainboard