Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 307

Error code
E1
Remote control:
1. Applicable model
All models
2. Error detection method
When normal communication
between the remote control and
the indoor unit is interrupted
for more than 2 minutes.
(Detectable only with the
remote control)
3. Condition of Error displayed
Same as above
4. Presumable cause
• Defective communication
circuit between remote
control-indoor unit
• Noise
• Defective remote control
• Faulty indoor control PCB
Note:
If the indoor unit cannot communicate normally with the remote control 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
Is it possible to
reset normally by the
power reset?
NO
Turn SW7-1 to OFF. � ON
Remove the wire � connecting
between indoor/outdoor units.
Power reset
Does the drain
pump restart automatically
1 minute later?
NO
Note (2) Does the remote control still display "
after 3 minutes?
306
-
Content
Remote control
communication circuit error
Diagnosis
YES
YES
" even
WAIT
-
'12 • PAC-T-178
Countermeasure
Malfunction by noise
Check peripheral
environment.
Defective indoor control
PCB ➞ Replace.
Defective remote control
➞ Replace.