Communication Error During Operation - Mitsubishi Heavy Industries FDT200VSAWPVH Service 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 unit control
PCB
Note:
Pressing the pump-down switch cancels communications between indoor and outdoor unit so that "communication
error-E5" is displayed on indoor unit and remote control, but it is normal.
LED Green Red
Keeps flashing 2-time flash
Indoor
Keeps flashing See below
Outdoor
5. Troubleshooting
Diagnosis
● In case that the outdoor unit red LED flashes 2-time
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?
●
In case that the outdoor unit red LED stays OFF
Power source reset
Has the remote
control LCD returned to
normal state?
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Content

Communication error during operation

looseness) on the outdoor unit terminal block.
NO
signal wires between indoor-outdoor units.
NO
NO
YES
NO
YES
-
'21 • PAC-SM-383
Countermeasure
Repair signal wires.
Repair signal wires.
To the diagnosis of
" ".
WAIT
Unit is normal.
(Malfunction by temporary
noise, etc.)
Defective outdoor unit
PCB (Defective network
communication circuit) ➞
Replace.
Unit is normal.
(Malfunction by temporary
noise, etc.)