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A unit controller with pressure display function supports only the factory default.
This section explains the unit controller's various display lamps, button for single-module operation, and
operation state.
RUN (Run button)
During remote group operation: Disabled (In accordance with instructions from the module controller.)
During unit module operation: Touch RUN to operate the corresponding module.
STOP (Stop button)
During remote group operation: Touch STOP to stop the corresponding module.
The module changes to unit module mode.
During unit module operation: Touch 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: Switches between cooling and heating during single-module operation.
(Valid only when the heat pump is off.)
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 (with pressure display function)
Unit Controller (with pressure display function)
POWER lamp (green)
Lights up when the heat
pump is powered.
ALARM lamp (yellow)
Flashes/lights up when
a fault occurs.
Lamp/operation panel (unit controller)
Example: Bar graph display mode
Unit controller
(Display lamps/buttons for module
controller single-module operation)
Module controller
I/O board at the back
Unit controller (CPU control board)
RUN lamp (green)
Lights up while the heat
pump is running
Control circuit, fan motor, and pump breaker (CB1)
Change settings, confirm, and
return button
Run, stop, buttons
REMOTE monitor
Highlighted during remote group
operation.
Operation state monitor
Display the current
operation state.
LIMITED CAPACITY monitor
Highlighted when limiting the
maximum capacity.
ALERT monitor
Highlighted or flashes when
waiting to operate.
