Mitsubishi Heavy Industries FDT71VNXWVH User Manual

-
81
-
'19 • PAC-SM-332
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
INSPECT I/U
INSPECT I/U
(Connection of 3 units or more remote controls)
Keeps ashing Stays OFF
Keeps ashing 2-time ash
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
Reduce to 2 units or less.
Change remote control
setting to “Master”. (SW1
on remote control PCB)
Change address. (SW2 on
indoor unit control PCB)
Change to master. (SW5-
1, 2 on indoor unit control
PCB)
Correct.
Correct.
Defective outdoor unit
control PCB
➞
Replace.
Broken connecting
wire
➞
Correct.
Defective indoor unit
control PCB
➞
Replace.
2. Error detection method
Indoor unit cannot communicate
for more than 30 minutes after
the power on with remote
control.
3 . Condition of error displayed
Same as above
4. Presumable cause
• Improper setting
• Surrounding environment
• Defective remote control
communication circuit
• Faulty indoor unit control
PCB
• Faulty outdoor unit control
PCB
Note:
If any error is detected 30 minutes after displaying “
WAIT
” on the remote control, the display changes to
“INSPECT I/U”.
NO
NO
NO
NO
NO
Are more than
3 units of remote control
connected?
Does remote
control display
“Slave”?
YES
Do more than
one indoor units have the
same address?
Is it set to
a slave indoor unit?
(
SW5-1, 2
)
Is there loose
or wrong connection at the termanal
of wiring between indoor and
outdoor units?
Is the
grounding wire connected
properly?
Is approx.
DC20V detected between ➁-➂
on the outdoor unit terminal
block?
Is approx.
DC20V detected between ➁-➂
on the indoor unit terminal
block?
YES
YES
NO
NO
NO
YES
YES
YES
YES
YES

Mitsubishi Heavy Industries FDT71VNXWVH Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDT71VNXWVH
Category	Air Conditioner
Language	English