3 – 7
Yes
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Open circuit of the
outdoor thermistor
Replace the
thermistor.
Replace the fan motor.
Replace the outdoor control PWB.
Replace the Compressor.
Replace the IPM PWB.
Replace the current
transformer
Connect CN6.
Overheat of the compressor
Is CN3 connected ?
Is CN16 connected ?
Check the voltage
(15V).
Check the voltage
(15V).
Check the voltage (5V).
Replace the IPM PWB
Connect CN3
Connect CN16
Check the FUSE 5
AC overcurrent
Rotation error of
the compressor
Power module PWB
(IPM) abnormality
Abnormal AC current
Open circuit of serial signal line
Short circuit of serial signal line
Power factor module (AF1) error
Replace the Power
factor module (AF1)
Are 3 LEDs
switched off ?
Is CN6 connected ?
The cycle is abnormal.
The compressor is abnormal.
P-U,N-U
P-V,N-V
P-W,N-W
A
Is the resistance
value of the ther-
mistor for the com-
pressor (TH1), heat
ex-changer (TH2)
or outdoor temper-
ature (TH3) or suc-
tion (TH4, TH6-8)
correct?
Is each of the resist-
ance values among
the terminals of the
IPM PWB 0 ?
P-U,N-U
P-V,N-V
P-W,N-W
Is each of the resistance
values among the termi-
nals of the IPM PWB 0 ?
Is the IPM PWB in a
state of floating from
theheatsink?
Fix the IPM PWB with
screws securely.
Is the winding of the current
transformer (CT1) broken ?
Is the resistance value of the
winding in the current trans-
former (CT1) ? (720)
Is the Power factor module in a
state of flaoting from the heatsink?
Fix the Power factor
module with screws
secuerly
Is the resistance value among
the terminal of the Power fac
-
tor module (AF1) 0 ?
Is the outdoor fan
motor operating ?
Inspect the compres-
sor, heat exchanger
and piping.
Is the resistance value
between 5 and 8
of fan motor 0?
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