54
7-1.
Basic
Operation
4) Cooling operation 1. Purpose
Cooling
2. Details
This section performs
cooling operation
according to cooling
conditions specified for
the steps on the left.
3. Operations
1) By pressing the [ ]
button on the remote
controller, the hydro
unit controller starts to
transmit a cooling
operation signal to the
outdoor unit.
2) The hydro unit
controller performs the
operation controls
shown on the left while
also controlling the
circulation pump, water
2-way valve, and water
3-way valve.
3) The outdoor unit
controls the
compressor, outdoor
fan motor, pulse motor
valve, and 4-way valve
based on the operation
signals transmitted by
the hydro unit.
Item Operation flow and applicable data, etc. Operation description
Hydro unit
control
Circulation pump "ON/OFF" control
Water 3-way valve control
Water 2-way valve control
Cooling temperature: 7°C to 25°C
Number of compressor revolutions control
Number of outdoor fan motor revolutions control
Pulse motor valve control
4-way valve control
Outdoor unit
control
Operation instruction
signal transmit
Cooling operation
start
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