Ye
s
No
Ye
s
Ye
s
No
No
Ye
s
No
[E31]
e
s
u
a
C
e
d
o
c
k
c
e
h
C
Check code name
IPDU communication
trouble
1.
Connection
trouble
of communication line between
IPDU and I/F P
.C. board
2.
I/F P
.C. board
trouble
3.
IPDU P
.C. board
trouble
4.
External noise
Is
communication
connector between IPDU
and I/F P
.C. board
connected?
Is there
no disconnection on
communication line
between IPDU and I/F
P
.C. board?
Is there
voltage deflection
between 4 and 5 pin of
CN600 on I/F P
.C. board?
(Measurement with tester:
DC 0 to 5V
,
5 pins GND)
Is there
voltage deflection
between 3 and 5 pin of
CN600 on I/F P
.C. board?
(Measurement with tester:
DC0 to 5V
,
5 pins GND)
Correct connection of connector
.
Replace communication line.
I/F P
.C. board
trouble
I/F P
.C. board
trouble
Replace defective IPDU
P
.C. board.
In the case that
All IPDUs (A3- IPDUs and
fan IPDU) do not return response.
*
Two A3-IPDUs (NO. 1 and 2) and one Fan-IPDU exist in all models.
Sub-code
No
Reset power supply and reactivate.
Y
es
I/F board
trouble
--> Replace
Was power
supply correctly reset?
(Power supply OFF for
60 seconds or more)
Sub-code : 80
Communication
trouble
between MCU and MCU
Circle (O):
Troubled
IPDU
1
2
1
0
1
○
0
2
○
0
3
○
○
0
8
○
0
9
○
○
0
A
○
○
0
B
○
○
○
A3-IPD
U
Fan
IPDU
[E19]
[E20]
Sub-code: 01: Connection of an outdoor unit in another line 02: Connection of an indoor unit in another line
Cause
Check code
Check code name
Cause
Check code
Check code name
O
utdoor unit quantity
trouble
1.
Misconnection of inter-unit wire between indoor
and outdoor
2.
Outdoor I/F P
.C. board
trouble
Unit connected to other line
during automatic address
When starting automatic indoor address, a device in
another line is connected.
Separate the connection between the lines following the address setup method.
Sub-code: 00: No
outdoor
unit
Yes
No
Is
communication
line between indoor and
outdoor connected to
one unit per 1
system?
Connect
communication
line
between indoor and outdoor.
Check I/F board.
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