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Explanation of the various display lamps and button for module independent operation of the unit
controller
POWER lamp (green)
Lights up when the heat
pump is powered.
RUN lamp (green)
Lights up while the heat
pump is running.
REMOTE lamp (green)
Lights up during
Remote Group
operation.
RUN (Run button)
During remote group operation: Disabled (In accordance with instructions from the module controller.)
During unit module operation:
STOP (Stop button)
During remote group operation: Press STOP to stop the corresponding module.
During unit module operation:
MODE (Cooling/heating button) (heat pump module only)
During remote group operation: Disabled (Switching between cooling and heating follows commands
During unit module operation:
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
ALARM lamp (yellow)
Flashes/lights up
when a fault occurs.
Lamp/operation panel (unit controller)
Module controller
I/O board at the back
Press RUN to operate the corresponding module.
The module changes to unit module mode.
Press STOP to stop the corresponding module.
from the module controller.)
Buttons between cooling and heating during single-module operation.
(Mode change only possible when the heat pump is not running.)
ALERT lamp (green)
Flashes/lights up when
waiting to operate.
- 35 -
LIMITED CAPACITY lamp
(green)
Lights up when limiting the
maximum capacity.
Run, stop, buttons
Change settings, confirm, and
return button
Unit controller
(Display lamps/button for module
controller single-module operation)
Unit controller (CPU control board)
Control circuit, fan motor, and pump breaker (CB1)
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