Gree GMV-1015WM/G-U, Service Manual

Page: 167 / 331

Gree GMV6 DC Inverter VRF Units Service Manual
165
"L1" Indoor Fan Protection
Is the type of motor of the
faulty indoor unit DC motor, AC motor
or PG motor?
Remove foreign
matters
Yes
No
For a DC motor or a PG motor,
the low speed of motor would trigger protection.
In this case, check whether the motor, shaft or
blades are clogged or stuck
Is the motor abnormal?
Replace the abnormal
motor with the same
model's motor
Yes
No
The main board
of indoor unit operates
improperly
Replace the main
board of indoor unit
Yes
For an AC motor without fan
protection signal input (for details, see the
circuit diagram of the indoor unit), check whether
the fan protection input is connected properly
on the main board
Looseness, oxidation or
poor contact of jumpers
may misleadingly trigger
indoor fan protection
No
For models with fan protection
signal input (for details, see the circuit diagram of
the indoor unit), check whether the fan overload
protector operates properly
No
No
Replace the fan overload
protector