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SM-16005-rev.2
3-31
TROUBLESHOOTING
Are #1-#6 of DSW2 on
O.U. PCB set incorrectly?
Are the settings of
DSW1 and RSW1 on
O.U. PCB and setting
of DSW5 and RSW2 on
I.U. PCB totally same in
a refrigerant cycle?
Total indoor unit capacity
is wrong.
Set capacity of O.U. PCB.
No
Yes
Yes
Yes
Are #1-#4 of DSW3 on
I.U. PCB set incorrectly?
Set capacity of I.U. PCB.
No
Set them correctly.
No
Outdoor Unit PCB: DSW1, RSW1
Indoor Unit PCB: DSW5, RSW2
l
The RUN indicator (red) flashes.
l
The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code*
1)
,
the model name*
1)
and the number of connected indoor units are displayed on the LCD. The indoor unit
number and the alarm code are displayed on the 7-segment display of the outdoor unit PCB.
*1) Except for some models.
H
This alarm code is indicated when the capacity setting DIP switch, DSW2, on the outdoor unit PCB,
is not set (all the settings from #1 to #6 are OFF) or set incorrectly.
H
This alarm code is displayed when the total indoor unit capacity is less than 50% or more than 130% of
the combined outdoor unit capacity.
Cause
Check Item
Action
(Turn OFF Main Switch)
Event
Check combination of
indoor units and capacity
setting of I.U. PCB.
Correctly set DIP switch,
DSW3.
Incorrect Capacity Setting of Indoor Unit
Check outdoor unit
model by calculating
total indoor units
capacity.
Ensure that total
indoor unit capacity is
from 50% to 130%.
Total Indoor Unit Capacity Connected to
Outdoor Unit is Beyond Permissible Range
Check refrigerant cycle
setting of O.U. PCB
and I.U. PCB.
Set them correctly.
Refrigerant Cycle Setting of Outdoor Unit
and Indoor Unit is Different
Check capacity setting
of O.U. PCB.
Correctly set DIP switch,
DSW2.
Incorrect Capacity Setting of Outdoor Unit
DSW and RSW factory setting is 0.
Maximum in setting refrigerant cycle No. is 63.
Setting Switch
10 digit
3
2
1
4
ON
5 6
OFF
1 digit
0
7
9
5
8
6
4 3
1 2
Setting Position
Set by inserting
slotted screwdriver
into the groove.
Outdoor Unit
DSW1
RSW1
Indoor Unit
DSW5
RSW2
Example of Setting Refrigerant Cycle No.25
0
7
9
5
8
6
4 3
1 2
3
2
1
4
ON
5 6
OFF
Turn ON No. 2 pin.
Set Dial No.5.
O.U. PCB: Outdoor Unit PCB
I.U. PCB: Indoor Unit PCB
Refrigerant Cycle No. Setting
Alarm
Code
Incorrect Capacity Setting of Indoor Unit and Outdoor Unit
Summary of Contents for IDM030B21E Series
Page 2: ......
Page 10: ...viii SM 16005 rev 2...
Page 14: ......
Page 15: ...SM 16005 rev 2 1 1 INSTALLATION 1 Installation...
Page 19: ...SM 16005 rev 2 2 1 OPERATION 2 Operation...
Page 22: ......
Page 23: ...SM 16005 rev 2 3 1 TROUBLESHOOTING 3 Troubleshooting...
Page 70: ......
Page 71: ...SM 16005 rev 2 4 1 MAINTENANCE 4 Maintenance...
Page 130: ......
Page 131: ...SM 16005 rev 2 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions...
Page 140: ...6 10 SM 16005 rev 2 FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A f t 3 l b...
Page 141: ...SERVICE PARTS LIST SM 16005 rev 2 7 1 7 Service Parts List...
Page 143: ......
Page 144: ...2016 Johnson Controls Inc SM 16005 rev 2 Code No LIT 12012293 Revised February 2019...