Diagnosis For Overload And Discharge Malfunction - Daikin FTKS18SL216 Service Manual

6.Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit)
Main detection point:
● If the electron expansion valve is connected well? Is the expansion valve damaged?
● If the refrigerant is leakage?
● If the overload protector is damaged?
Malfunction diagnosis process:
protector SAT
66
After the unit
de-energized
for 20min
If the overload protector SAT
is well connected?
Under ambient temperature, test the
resistance of overload protector with ohmic
If the wiring terminal FA of electron
N
expansion is well connected?
The resistance value of
firs t 4 l e ad fo ot an d th e
fif th lead fo ot is similar,
less than 100
Replace
Replace EKV
overload
coil of electron
expansion valve
Remove
malfunction?
Check refrigerant, if there is
leakage, please refer to
specification
Remove
malfunction?
Replace
control board
End
Y
Y
Y
N
N
AP1
N
Connect wire
well with wiring
N
diagram
Y
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