Gree GMV6 DC Inverter VRF Units Service Manual
150
"L1" Indoor Fan Protectio n
Is th e type of motor o f th e
faulty indo or u nit DC motor, AC mo tor
or PG motor?
Remove forei gn
matters
Yes
No
For a DC motor or a PG mo tor,
the low speed of mo tor would trigger pro tection.
In this case, check whether th e motor, shaft or
blad es are clogge d o r stuck
Is th e motor abno rmal?
Replace th e a bnormal
motor with the same
model's motor
Yes
No
The ma in b oard
of in door unit operates
improp erly
Replace th e main
boa rd o f indoo r u nit
Yes
For an AC motor withou t fa n
protection sig nal input (for d eta ils, see the
circuit diag ram of the ind oor unit), check whether
the fan pro tection input is connected proper ly
on the ma in b oard
Loo sen ess, oxidation or
poo r contact of ju mp ers
may misleadin gly trigge r
indo or fan pro tection
No
For mo dels with fan pro tection
signal inpu t (for d eta ils, see the circuit dia gram o f
the indoor uni t), check whether th e fan overloa d
protector o perates p roperly
No
No
Replace th e fan overloa d
protector