Communication Error - Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual

E14
1. Applicable model
All models
2. Error detection method
When communication error
between master and slave
indoor units occurs
3. Condition of Error displayed
Same as above
4. Presumable cause
• Unit address setting error
• Broken remote controller wire
• Defective remote controller
wire connection
• Defective indoor control PCB
Note:
Keeps flashing 1 time flash
Keeps flashing Stays Off
5. Troubleshooting
Diagnosis
292
–

Communication error

between master and slave indoor units
–
Countermeasure
Correct unit address setting.
Correct wiring.
Defective indoor control
PCB Replace.
• Malfunction by noise
• Check surrounding
environment.