Gree GWH(09)MA-K3DNA2B - Page 44

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Troubleshooting
9.2.2 H6 malfunction
“ H6” is
displayed on
the unit
.
Stir the fan blade
with a hand when
the unit is DEEN-
ERGIZED.
Does the blade
rotate unsmoothly ?
Reinstall the motor
and the blade to
make it rotate
smoothly
.
Yes
Is the feedback
terminal of PG
motor loose?
Insert the feedback
terminal tightly
.
Mainboard
malfunction
;
Replace it .
No
Yes
Replace the fan
motor
.
End
Is the control
terminal of PG
motor loose?
Insert the control
terminal tightly
.
Yes
No
is over 50V
No
Yes
No
Is the
malfunction
eliminated ?
No
Is the
malfunction
eliminated?
No
Is the
malfunction
eliminated?
No
Is the
malfunction
eliminated?
No
Yes
Yes
Yes
Yes
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:
turn on the unit;measure
Re-energize to
within1turnontheunit;
measure
within 1 min after the louvers are opened whether
the output voltage on the control
ter minal of the PG motor