Gree GEH18AA-K3DNA1D Service Manual page 63

(4) Troubleshooting for H6 malfunction
60
Start the
troubleshooting
for H6 malfunction
Check whether the
terminal of DC motor is
connected tightly
Yes
No
Pull blade
with hand to see
whether
it can rotate
smoothly
Yes
No
Energize the unit and turn on the unit.
Afterthe horizontal louver opens for 1
min, measurewhether the input DC
voltage VDC (red wire) of motor is300s,
whether the DC voltageVCC
(white wire0 is 15V and whether the
outputVSP (yellow wire) is more t
han 1.1V. The earthingwire is black wire;
Yes
No
Replace controller
End
No
Insert the motor
terminal tightly
Is mafunction
eliminated?
No
Re-assemble blade
and motor correctly
Is mafunction
eliminated?
Yes
Yes
motor can be started
Whether the voltage
on motor feedback
No
terminal (blue wire)
is more than 1.1V
Replace motor
Yes
Is mafunction
eliminated?
Yes
Yes
Whether
Yes
up
No
Yes
Service Manual
Installation and Maintenance