Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 66

Error code
E1
Remote controller:
-
7-segment display:
1. Applicable model
All models
2. Error detection method
When normal communication
between remote controller
and indoor unit is interrupted
for more than 2 minutes.
(Detectable only with the
remote controller)
3. Condition of error displayed
Same as above
4. Presumable cause
• Anomalous communication
circuit between remote
controller and indoor unit
• Noise
Note:
If the indoor unit cannot communicate normally with the remote controller for 180 seconds, the indoor unit PCB starts to
reset automatically.
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing Stays Off
Outdoor
5. Troubleshooting
Diagnosis
(2)
Is it possible to
reset normally by the power
supply reset?
NO
(1)
Turn SW7-1 OFF. ➝ ON
Disconnect the wire ➂
between indoor and outdoor
units
Reset power supply
Does
the drain pump start
automatically at one
minutes after power
ON?
NO
Note (2) Does the remote controller displays "Internal check ON" even
after 3 minutes?
64
–
Content
Remote controller
communication error
YES
Note (1) SW7-1: OFF ➝ ON
YES
–
Countermeasure
Malfunction by temporary
noise.
Check peripheral
environment
Indoor control PCB
anomaly
 Replace it
Remote controller
anomaly
 Replace it