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Explanation of the various display lamps and button for module independent operation of the unit
controller
RUN (Run button)
During remote group operation: Disabled (In accordance with instructions from the module controller.)
During unit module operation: Press RUN to operate the corresponding module.
STOP (Stop button)
During remote group operation: Press STOP to stop the corresponding module.
The module changes to unit module mode.
During unit module operation: Press STOP to stop the corresponding module.
MODE (Cooling/heating button)
(heat pump module only)
During remote group operation: Disabled (Switching between cooling and heating follows commands
from the module controller.)
During unit module operation: Buttons between cooling and heating during single-module operation.
(Mode change only possible when the heat pump is not running.)
Note: To perform unit module operation when another module, connected to the same water piping system, is operating
(RUN touched), do so in accordance with the operation mode (cooling or heating) of the other module.
REMOTE (Remote/Unit button)
Switches between remote group operation (control via module controller) and unit module operation
(single-module operation).
Unit Controller
POWER lamp (green)
Lights up when the heat
pump is powered.
ALARM lamp (yellow)
Flashes/lights up
when a fault occurs.
REMOTE lamp (green)
Lights up during
Remote Group
operation.
Lamp/operation panel (unit controller)
Unit controller
(Display lamps/button for module
controller single-module operation)
Module controller
I/O board at the back
Unit controller (CPU control board)
Control circuit, fan motor, and pump breaker (CB1)
Change settings, confirm, and
return button
Run, stop, buttons
ALERT lamp (green)
Flashes/lights up when
waiting to operate.
LIMITED CAPACITY lamp
(green)
Lights up when limiting the
maximum capacity.
RUN lamp (green)
Lights up while the heat
pump is running.