Communication Error At Initial Operation - Mitsubishi FDUA160AVSAWVH Service Manual

Error code
Remote control:
WAIT
1. Applicable model
All models
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Faulty indoor unit control
PCB
• Defective remote control
• Broken remote control wire
• Faulty outdoor unit control
PCB
• Broken connection wires
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
Keeps flashing 2-time flash
Outdoor
5. Troubleshooting
Diagnosis
" " is still displayed on the
WAIT
remote control LED 2 minutes
after power ON.
YES
Is the outdoor unit
green LED
flashing?
YES
Is the indoor unit
green LED flashing?
YES
Is the outdoor unit
red LED flashing
twice?
YES
Are wires
connected properly between indoor/
outdoor units?
YES
Is approx.
DC20V detected between -Ž on
the outdoor unit terminal
block?
YES
Is approx.
DC20V detected between -Ž on
the indoor unit terminal
block?
74
-
Content Communication error at
initial operation (1/2)
NO
To next page
NO
NO
NO
NO
NO
YES
-
'21 • PAC-SM-396
Countermeasure
Defective indoor unit
control PCB ➞ Replace.
Defective indoor unit
control PCB ➞ Replace.
Defective remote control ➞ Replace.
Broken remote control wire X or
Y ➞ Replace.
Correct connection wires
between indoor and
outdoor units.
Defective outdoor unit
control PCB ➞ Replace.
Defective connection wire
(Broken)
Noise
Defective indoor unit
control PCB ➞ Replace.