Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 255

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 contnrol PCB starts to
reset automatically.
LED Green Red
Keeps flashing Stays OFF
Indoor
– 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.
254
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Content
Remote control
communication circuit error
YES
Note (1) Only indoor unit with drain pump
YES
-
'17 • SCM-T-225
Countermeasure
Malfunction by noise
Check peripheral
environment.
Defective remote control
or defective indoor control
PCB ➞ Replace.
Move to E5
(Communication error
during operation) check.