Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 297

INSPECT I/U
1. Applicable model
All models
2. Error detection method
Communication between indoor
unit and remote controller
is disabled for more than 30
minutes after the power on.
3. Condition of Error displayed
Same as above
4. Presumable cause
• Improper setting
• Surrounding environment
• Defective remote controller
communication circuit
Note:
If any error is detected 30 minutes after displaying "
"INSPECT I/U".
Keeps flashing Stays Off
Keeps flashing 2 times flash
5. Troubleshooting
Diagnosis
276
–
INSPECT I/U
(When1 or 2 remote controllers are connected)
" on the remote controller, the display changes to
–
Countermeasure
Set SW1 on remote
controller PCB at "Master".
Set address again. (SW2 on
indoor PCB)
Separate remote controller
wires from high voltage
wires.
Defective indoor control
PCB Replace.
Defective remote controller
Change.