Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 65

Error code
Remote controller: [No display]
7-segment display:
1. Applicable model
All models
(No display on the remote
controller after power ON)
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Fuse blown
• Noise filter anomaly
• Anomalous connection of
wire between PCBs
• Indoor control PCB anomaly
• Remote controller anomaly
• Breakage of connecting wires
of remote controller
• Outdoor control PCB anomaly
Note:
LED Green Red
Stays Off Stays Off
Indoor
Stays Off Stays Off
Outdoor
5. Troubleshooting
Diagnosis
No display on the remote
controller after power ON
Is DC10V
or higher between X-Y
detected at remote
controller terminal?
YES
Is DC10V
or higher between X-Y
wires detected when
removing remote
controller?
YES
Are
connecting wires between
indoor and outdoor units
connected properly?
YES
63
–
Content
[No display]
NO
NO
NO
–
Countermeasure
Remote controller anomaly
Remote controller anomaly
Correct connecting wire
Indoor control PCB
anomaly