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3. Hydro Unit
Control
10) Room temperature thermostat control (Option
board TCB-PCM03E is necessary. Connect
the connection cable to the water heat
exchange board CN211.)
When the room thermostat is connected and
heating or cooling operates with DP_SW12-4
set to ON, an room thermostat operation is
performed.
10-1)Heating thermostat operation
When the heating room thermostat is OPEN, the usual heating AUTO operation is performed.
After 30 minutes has passed, if the heating room thermostat continues to be in the OPEN status, the operation raises
the water temperature by 1 degree every 30 minutes. The same heater control as that of the usual HP operation
applies to the backup heater and booster heater.
When the heating room thermostat is CLOSE, the heat pump performs thermostat off. During the thermostat off, the
operation lowers the set water temperature by 1 deg every 30 minutes. When the thermostat off is completed, the
backup heater and booster heater stops being energized.
10-2)Cooling thermostat operation
When the cooling room thermostat is CLOSE, the usual cooling operation is performed. (Initial set water temperature
20°C)
After 30 minutes has passed, if the room thermostat continues to be in the OPEN status, the operation lowers the
water temperature by 1°C every 30 minutes.
When the cooling room thermostat is OPEN, the heat pump performs thermostat off. During the thermostat off, the
operation raises the set water temperature by 1 degree every 30 minutes.
11) Forcible stop control (Option board TCB-PCMO3E is necessary. Connect the connection cable to the water heat
exchange board CN210.)
• When CLOSE occurs between "HEAT" and "COM" of TCB-PCM03E, the RED LED on the option board lights and
the operation (hot water supply, heating, cooling) stops. To restart the operation, use the operation button of the
remote controller.
12) Output signal control 1 (Option board TCB-PCIN3E is necessary. Connect the connection cable to the water heat
exchange board CN208.)
• If an error detecting signal is output, CLOSE occurs between the terminal 1 and 2.
• If a boiler output signal is output, CLOSE occurs between the terminal 3 and 4.
• In either signal above is output, the red LED on the Option board lights.
13) Output signal control 2 (Option board TCB-
PCIN3E is necessary. Connect the connection
cable to the water heat exchange board
CN209.)
• When defrosting is in operation, CLOSE
occurs between the terminal 1 and 2.
• When the compressor is in operation,
CLOSE occurs between the terminal 3 and
4.
In either signal above is output, the red LED on
the OP board lights.
Item Operation flow and applicable data, etc.
PJ17
Terminal label
TCB-PCMO3E
CN210
Red
CN211
Black
Indoor thermostat
contact point
Correction control Heating operation Cooling operation
OPEN Setting shift UP Thermostat ON
Up water temperature by 1 deg every 30
mins
Thermostat OFF
Lower water temperature by 1 deg every
30 mins
CLOSE Setting shift DOWN Thermostat OFF
Lower water temperature by 1 deg every
30 mins
Thermostat ON
Up water temperature by 1 deg every 30
mins
PJ20
Terminal label
TCB-PCIN3E
CN208
Blue
CN209
Green
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 56 Monday, October 5, 2009 2:09 PM