Incorrect Indoor Unit No. Setting - Hisense Hi-FLEXi S Series Technical, Installation, Maintenance

Alarm
31
Code
● The RUN indicator (Red) is flashing
● The indoor unit number, the alarm code, the unit model code and the connected number of indoor units are displayed on
LCD. Meanwhile, the indoor unit number and the alarm code are displayed on the 7-segment of outdoor unit PCB.
★ 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.
★ This alarm code is indicated when the total indoor unit capacity is smaller than 50% or greater than 150% of the combined
outdoor unit capacity. This alarm code also can be triggered when Water Module capacity is greater than 100% of the
combined outdoor unit capacity or improper function setting of "H4" on the outdoor unit PCB for Water Module application.
Are #1-#6 of DSW2 on
O.U. PCB set incorrectly?
No
Are #1-#4 of DSW3 on
I.U. PCB set incorrectly?
No
Are the setting of
DSW1 and RSW1 on
O.U. PCB and the setting
of DSW5 and RSW2 on
I.U. PCB totally same in
a refrigerant cycle?
Yes
Total indoor unit capacity
is wrong.
Phenomenon
Incorrect Capacity Setting of Indoor Unit
Incorrect Capacity Setting of Outdoor Unit
Total Indoor Unit Capacity Connected to the
Outdoor Unit is Beyond Permissible Range
Refrigeration Cycle Setting of Outdoor Unit
and Indoor Unit is Different
Refrigerant Cycle No. Setting
Setting Switch
10 digit
ON
OFF
1 2 3 4 5 6
Outdoor Unit DSW1
Indoor Unit
DSW5
(H-NET II)
Incorrect Capacity Setting of Indoor Unit and Outdoor Unit
Yes
Yes
No
Cause
Example of Setting Refrigerant Cycle No. 25
1 digit
Setting Position
0
Set by inserting
slotted screwdriver
into the groove.
RSW1
DSW and RSW setting before shipment is 0.
RSW2
Maximum in setting refrigerant cycle No. is 63.
Check Item
Check combination of
indoor units and capacity
setting on I.U. PCB.
Check capacity setting
on O.U. PCB.
Check outdoor unit
model by calculating
total indoor units
capacity.
Check refrigeration cycle
setting on O.U. PCB
and I.U. PCB.
0
ON
OFF
1 2 3 4 5 6
Turn ON No. 2 pin. Set Dial No.5.
157
Troubleshooting
Set the capacity for
O.U. PCB.
Set the capacity for
I.U. PCB.
Set them correctly.
Outdoor Unit PCB: DSW1, RSW1
Indoor Unit PCB: DSW5, RSW2
O.U. PCB: Outdoor Unit PCB
I.U. PCB: Indoor Unit PCB
Action
(Turn OFF Main Switch)
Correctly set dip switch,
DSW3.
Correctly set dip switch,
DSW2.
Ensure that total
indoor unit capacity is
from 50% to 130%.
Set them correctly.