"L1" Indoor Fan Protectio n
Is th e type of motor of th e
faulty indo or u nit DC motor, AC motor
or PG motor?
Remove foreign
matters
Yes
No
For a DC motor or a PG mo tor,
the low speed of motor would trigger protection.
In this case, check whether th e motor, shaft or
blades are clogged o r stuck
Is th e motor abno rmal?
Replace the a bnormal
motor with the same
model's motor
Yes
No
The main b oard
of indoor unit operates
improp erly
Replace the main
board o f indoo r u nit
Yes
For an AC motor without fa n
protection signal input (for deta ils, see the
circuit diag ram of the indoor unit), check whether
the fan protection input is connected proper ly
on the main board
Looseness, oxidation or
poor contact of ju mpers
may misleadingly trigge r
indoor fan pro tection
No
For models with fan protection
signal inpu t (for d eta ils, see the circuit dia gram of
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
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