Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 201

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 unit 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
Diagnosis
Is it possible to
reset normally by the
power reset?
NO
Turn SW7-1 to OFF. ¨ ON
Remove the wire z connecting
between indoor/outdoor units.
Power source reset
（1）
Does the drain
pump restart automatically
1 minute later?
NO
Connect the wire z connecting
between indoor/outdoor units.
200
-
Content
Remote control
communication circuit error
YES
Note (1) Only indoor unit
with drain pump
YES
-
'19 • PAC-T-327
Countermeasure
Malfunction by noise
Check peripheral
environment.
Defective indoor unit control
PCB ➞ Replace.
Move to E5.
(Communication error
during operation) check.