Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 307

E5
1. Applicable model
All models
2. Error detection method
When normal communication
between indoor and outdoor
unit is interrupted for more than
2 minutes.
3. Condition of Error displayed
Same as above is detected
during operation.
4. Presumable cause
• Unit No. setting error
• Broken remote controller wire
• Faulty remote controller wire
connection
• Defective indoor control PCB
Note:
Pressing the pump-down switch cancels communications between indoor and outdoor unit so that "communication
error-E5" is displayed on indoor unit and remote controller, but it is normal.
Keeps flashing See below
Keeps flashing 2 times flash
5. Troubleshooting
Diagnosis
286
–
Communication error during operation
–
Countermeasure
Repair signal wires.
Repair signal wires.
To the diagnosis of
" "
Unit is normal.
(Malfunction by temporary
noise, etc.)
Defective outdoor control
PCB (Defective network
communication circuit)
Replace.
Unit is normal.
(Malfunction by temporary
noise, etc.)