Mitsubishi Electric SRK100VNPZJX, Technical Manual

Page: 423 / 509

-
422
-
INSPECT I/U
INSPECT I/U
(Connection of 3 units or more remote controller)
– –
Keeps flashing 2 times flash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Reduce to 2 units or less.
Change remote controller
setting to “Master”. (SW1
on remote controller PCB)
Set address again. (SW1 on
interface kit PCB)
Change to master. (SW3-1,
2 on interface kit PCB)
Correct
Correct
Defective outdoor control
PCB
➞
Replace.
Defective indoor control
PCB
➞
Replace.
Broken connecting wire
➞
Correct.
Defective interface kit
PCB
➞
Replace.
2. Error detection method
Indoor unit cannot communicate
for more than 30 minutes after
the power on with remote
controller.
3. Condition of Error displayed
Same as above
4. Presumable cause
• Improper setting
• Surrounding environment
• Defective remote controller
communication circuit
• Faulty indoor control PCB
• Faulty outdoor control PCB
• Faulty interface kit PCB
Note:
If any error is detected 30 minutes after displaying “
WAIT
” on the remote controller, the display changes to
“INSPECT I/U”.
NO
NO
NO
NO
NO
Are more than
3 units of remote controller
connected?
Does remote
controller display
“Slave”?
YES
Do more than
one interface kit have the
same address?
Is it set to
a slave interface kit.
SW3-1, 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
�
-
�
on the outdoor unit terminal
block?
YES
NO
NO
YES
YES
YES
YES
Is approx.
DC20V detected between
�
-
�
on the interface kit terminal
block?
YES
YES
YES
NO
Is approx.
DC20V detected between
�
-
�
on the indoor unit terminal
block?
NO
Error code
Remote controller:
Indoor
display
RUN light TIMER light
Green LED Red LED
Outdoor
control PCB
Content
-
422
-
'12 • PAC-T-174