Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 298

INSPECT I/U
1. Applicable model
All models
2. Error detection method
Indoor unit cannot communicate
for more than 30 minutes after
the power on with remote
controller.
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
(connection of 3 units or more remote controller)
Keeps flashing 2 times flash
5. Troubleshooting
Diagnosis
277
–
INSPECT I/U
" on the remote controller, the display changes to
–
Countermeasure
Reduce to 2 units or less.
Change remote controller
setting to "Master". (SW1
on remote controller PCB)
Change address. (SW2 on
indoor PCB)
Change to master. (SW5-1,
2 on indoor PCB)
Correct
Correct
Defective outdoor control
PCB Change.
Broken connecting wire
Correct.
Change indoor control
PCB.