Power Source System Error (Power Source To Indoor Control Pcb); Power Source System Error (Power Source To Remote Control) - Mitsubishi Heavy Industries FDT100VNP1VF2 Technical Manual

Error code
Remote control: None
1. Applicable model
All models
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Misconnection or breakage of
connecting wires
• Blown fuse
• Faulty transformer
• Faulty indoor control or
power PCB
• Broken harness
• Faulty outdoor control PCB
Note:
LED Green Red
(Power source to indoor control PCB)
Indoor Stays OFF Stays OFF
5. Troubleshooting
Diagnosis
Is
AC220-240V
detected between � and
� on the terminal block
of indoor
unit?
YES
Note(1) FDT, FDE: F1, F2
FDU, FDUM: F1
FDF: F200, F201
(1)
Are fuses OK
YES
(2) (3)
Is DC5V
detected between �-�
of CNW2?
Note (2) � for GND
YES
Is JX1 open?
167
-
Content Power source system error
NO
Is
AC220-240V
detected between
� and 2/N on the terminal
block of outdoor
unit?
NO
Isn't F5 fuse
(250V,8A)
blown?
NO
Is the
check of resistance between
�-� of CNW0
OK?
YES
Is the
checked result
of resistance of FM,
LM, etc
OK?
NO
(3) FDF series: CNW3
NO
-
'16 • PAC-T-240
Countermeasure
Misconnection or breakage
YES
of connecting wires
Replace fase.
YES
Defective outdoor control
NO
PCB
Defective indoor control or
NO
power PCB ➞ Replace.
Replace FM, LM, etc.
NO
Replace fuse.
YES
Defective indoor power
PCB ➞ Replace.
Open JX1.
Defective indoor control
YES
PCB ➞ Replace.