Mitsubishi FDK15KXZE1 Technical Manual page 82

Error code
None
Remote control:
1. Applicable model
All models
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Wrong connection or breakage
of connecting wires
• Blown fuse
• Transformer anomaly
• Indoor power PCB anomaly
• Broken harness
• Indoor unit control PCB
anomaly
Note:
LED Green Red
Stays OFF Stays OFF
Indoor
Stays OFF 2-time flash
Outdoor
5. Troubleshooting
Diagnosis
Is
AC 220-240V
detected between L-N on
the indoor terminal
block?
YES
Note (1)
Check the fuse at the power source side.
(1)
Are fuses OK?
YES
Is DC280V
detected between
CNM ① - ③ ?
YES
Is DC8V detected
between CNP ① - ③ ?
YES
Is JX1 open?
81
–
Power source system anomaly
Content
(Power source to indoor unit PCB)
NO
Is AC
380/415 V for 3-phase
unit detected between L1, L2, and L3 on
the outdoor terminal block
respectively.
NO
Is resistance
between ① - ③ of CNW0
OK?
YES
(2)
Is resistance
to FM, LM and etc.
OK?
Note (2) LM: Louver motor
FM: Fan motor
NO
NO
None of
actuator, etc. is
short-circuited?
YES
NO
–
'17 • KX-T-264
Countermeasure
Outdoor noise filter PCB
NO
anomaly  Replace it.
Wrong wiring or broken
YES
wires between outdoor and
indoor units.
Indoor power PCB
NO
anomaly  Replace it.
Replace FM, LM and etc.
YES
Replace fuse.
NO
Indoor unit power PCB
anomaly  Replace it.
Replace related parts.
NO
Defective indoor unit
control PCB  Replace.
Open JX1
Defective indoor unit
control PCB → Replace.