E5 Communication Error During Operation - Mitsubishi SCM40ZS-S Technical Manual

Error code
E5
Remote control:
1. Applicable model
All models
2. Error detection method
When normal communication
between indoor and outdoor
unit is interrupted for more than
2 minutes.
3. Condition of error displayed
Same as above is detected
during operation.
4. Presumable cause
• Unit No. setting error
• Broken remote control wire
• Faulty remote control wire
connection
• Faulty outdoor sub PCB
Note:
LED Green Red
Keeps flashing 2-time flash
Indoor
– 6-time flash
Outdoor
5. Troubleshooting
Diagnosis
Note (1) Inspect faulty connections (disconnection,
Is the
connection of signal
wires at the outdoor unit
side OK?
YES
Note (2) Check for faulty connection or breakage of
Is the
connection of signal
wires between indoor-outdoor
units OK?
YES
Power source reset
Has the remote
control LCD returned to
normal state?
248
-
Content
Communication error during operation
looseness) on the outdoor unit terminal block.
NO
signal wires between indoor-outdoor units.
NO
NO
YES
-
'16 • SCM-T-199
Countermeasure
Repair signal wires.
Repair signal wires.
Defective outdoor sub
PCB (Defective network
communication circuit) →
Replace.
Unit is normal.
(Malfunction by temporary
noise, etc.)