Mitsubishi Heavy Industries FDT100VNAWVH Service Manual page 142

Error code
INSPECT I/U
Remote control:
1. Applicable model
All models
2. Error detection method
Communication between indoor
unit and remote control is
disabled for more than 30
minutes after the power on.
3. Condition of error displayed
Same as above
4. Presumable cause
• Improper setting
• Surrounding environment
• Defective remote control
communication circuit
• Faulty interface kit PCB
Note:
If any error is detected 30 minutes after displaying "
"INSPECT I/U".
RUN light TIMER light
Indoor
display
– –
Green LED Red LED
Outdoor unit
control PCB
Keeps flashing 2-time flash
5. Troubleshooting
Diagnosis
YES
⑴， ⑵
Set one remote control
for "Master" and the other
for "Slave"
Note (1) Use SW1 to set at
master or slave.
Does it
become normal?
NO
Do more than
one interface kit have the
same address?
Are remote
control wires laid
along high voltage
Is approx.
DC20V detected between -Ž
on the interface kit terminal
Is approx.
DC20V detected between -Ž
on the remote control terminal
WAIT
141
-
Content
INSPECT I/U
(When 1 or 2 remote controls are connected)
Are 2 units
of remote control
connected?
NO
⑵
Is it set
at the slave remote
control?
Note (2)
"Slave" is displayed
on the remote
control LCD.
NO
YES
NO
YES
wires?
NO
NO
block?
YES
NO
block?
YES
" on the remote control, the display changes to
-
'19 • PAC-SM-309
Countermeasure
Set SW1 on remote control
YES
PCB at "Master".
Set address again. (SW3 on
interface kit PCB)
Separate remote control
wires from high voltage
wires.
Defective interface kit
PCB ➞ Replace.
Broken connecting wire ➞
Correct.
Defective remote control
PCB ➞ Replace.