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When connected to Apply voltage terminals of multiple RB units with a connected
unit, be sure to make a branch outside the RB unit using a pull box, etc. as shown on
below example.
DC power sup-
ply 12 - 24V
Load
resistance
connected unit
COOLING/HEATING PRIORITY FUNCTION
"Edge" input only
Connector
Input signal
OFF → ON
CNA01 or CNA02
ON → OFF
On
CNA01 or
CNA02
Off
Heating
Priority mode
Cooling
10. TEST RUN
10.1. Test run using Outdoor unit (PC board)
• Refer to the Installation Manual for the outdoor unit to perform the test run using the
outdoor unit.
10.2. Test run using Remote Controller
• Refer to the Installation Manual for the remote controller to perform the test run
using the remote controller.
11. CHECK LIST
Pay special attention to the check items below when installing the RB unit(s). After
installation is complete, be sure to check the following check items again.
CHECK ITEMS
Has the RB unit been installed
correctly?
Has there been a check for gas
leaks (refrigerant pipes)?
Has heat insulation work been
completed?
Is the voltage of the power source
the same as that indicated on the
label on the RB unit?
Is the address setting correctly
configured?
Are the wires and pipes all
connected completely?
Is the RB unit earthed (grounded)?
Is the connection cable the specified
thickness?
PC board
CNA
02
PC board
CNA
02
Command
Heating priority
Cooling priority
CHECK
If not performed correctly
BOX
Vibration, noise, RB unit may
drop
No cooling, No heating
Water leakage
No operation, heat or burn
damage
No operation
No operation, heat or burn
damage
Short circuit
No operation, heat or burn
damage
12. INDICATOR LAMP STATUS
Power indica-
Error
tor lamp
indicator lamp
(Green)
(Red)
Lit when the power is turned on.
(Lit)
The wiring is incorrect. The "IN/U" terminal of RB
unit and outdoor unit transmission terminal are
connected with the transmission cable. Correctly
(Lit)
(Lit)
connect the wiring. When re-wiring, you must turn
off the power.
There is a fault with the communication board or
●
(Lit)
(Flashing)
the main board.
●
: 0.1s ON / 0.1s OFF
Status contents
En-10
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