E5 Communication Error During Operation - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

Error code
Remote controller:
E5
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 controller wire
• Faulty remote controller wire
connection
• Faulty outdoor sub PCB
Note:
LED Green Red
Indoor Keeps flashing 2 times flash
Outdoor – 6 times flash
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 reset
Has the remote
controller LCD returned to
normal state?
91
-
Content
Communication error during operation
looseness) on the outdoor unit terminal block.
NO
signal wires between indoor-outdoor units.
NO
NO
YES
-
'10 • SCM-SM-094
Countermeasure
Repair signal wires.
Repair signal wires.
Defective outdoor sub
PCB (Defective network
communication circuit)
Replace.
Unit is normal.
(Malfunction by temporary
noise, etc.)