Mitsubishi Electric FDT125VNVF Technical Manual page 418

Error code
None
Remote controller:
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 indoor control PCB
• Broken harness
• Faulty outdoor control PCB
(Noise filter)
Note:
RUN light TIMER light
Indoor
– –
display
Green LED Red LED
Outdoor
Stays OFF 2 times flash
control PCB
5. Troubleshooting
Diagnosis
Is
AC220/240V
detected between 1 and
2 on the terminal block
of indoor
unit?
YES
Are fuse OK
(250V 3.15A)?
YES
417 417
- -
Power supply system error
Content
(Power supply to indoor control PCB)
NO
Is
AC380/415V
for 3-phase unit detected
between 1, 2 and 3 on the teminal
block of outdoor unit or is AC220/240V
for 1-phase unit detected between
1 and 2 on the terminal
block of outdoor
unit?
YES
NO
- -
'12 • PAC-T-174
Countermeasure
Defective outdoor control
PCB (Noise filter)
NO
Misconnection or breakage
of connecting wires
Replace fuse.
Defective indoor control
PCB ➞ Replace.