185
Troubleshooting
Alarm
Code
c3
Incorrect Indoor Unit Connection (SW BOX)
● LED (LED5, 6 ) on SW BOX PCB ashes
★
<Heat Recovery System>
This alarm code is indicated when indoor unit with dierent refrigerant cycle group is connected to SW BOX.
● Alarm Code “
c3
” will be indicated when the units are connected as follows.
No
Yes
Yes
No
Is wiring connection for SW
BOX incorrect?
Is the refrigerant cycle group setting
for indoor unit connected to
SW BOX incorrect?
Correctly connect the wiring
and reset the power supply.
Set refrigerant cycle group
(RSW2, DSW5) correctly
and reset the power supply.
Failure of SW BOX PCB
Refrigerant Cycle Group is different.
Alarm Code "C3" will be indicated in this SW BOX
Outdoor Unit
(Ref. Cycle Group: 1)
SW BOX
Indoor Unit
(Ref. Cycle Group: 1)
SW BOX
Indoor Unit
(Ref. Cycle Group: 1)
SW BOX
Indoor Unit
(Ref. Cycle Group: 1)
Indoor Unit
(Ref. Cycle Group: 2)
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