Panasonic WH-MXC16G9E8 Service Manual ▷ View online
41
12. Operation and Control
12.1 Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating
mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and
performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by
the microcomputer at indoor unit that judging the condition according to internal water setting temperature and water
outlet temperature.
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating
mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and
performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by
the microcomputer at indoor unit that judging the condition according to internal water setting temperature and water
outlet temperature.
12.1.1 Internal Water Setting Temperature
Once the operation starts, control panel setting temperature will be taken as base value for temperature shifting
processes. These shifting processes are depending on the Air-to-Water Heat pump settings and the operation
environment. The final shifted value will be used as internal water setting temperature and it is updated continuously
whenever the electrical power is supplied to the unit.
processes. These shifting processes are depending on the Air-to-Water Heat pump settings and the operation
environment. The final shifted value will be used as internal water setting temperature and it is updated continuously
whenever the electrical power is supplied to the unit.
12.1.2 Heating Operation
12.1.2.1 Thermostat
Control
Compressor is OFF when Water Outlet Temperature – Internal Water Setting Temperature > 2°C for
continuously 3 minutes.
Compressor is ON after waiting for 3 minutes, if the Water Outlet Temperature – Water Inlet Temperature
(temperature at thermostat OFF is triggered) <-3°C.
12.1.2.2 Thermostat
Control
(Outdoor Ambient Temperature)
Stops provide heating to room side during high outdoor ambient condition.
Control content:
Control content:
Heating operation and water pump will turn OFF when outdoor ambient temperature > outdoor thermo off
temperature + 3°C.
(Outdoor thermo off set temperature is set by control panel. Thermo off set temperature is between 5°C ~ 35°C)
(Outdoor thermo off set temperature is set by control panel. Thermo off set temperature is between 5°C ~ 35°C)
Heating operation will resume when Outdoor ambient temperature < Outdoor thermo OFF set temperature + 1°C.
12.1.2.3 Heat
Mode
Operation
Operation of heat pump provide heating capacity to room side by hot water through heating panel, floor heating or
fan coil unit.
fan coil unit.
1 3 ways valve control:
o
3 ways valve switch and fix to heating side.
2 Heat pump operates follow normal heating operation.
3 Back up heater operate follow normal operation.
4 Solar 3 way valve operates follow solar operation specification.
5 2 ways valve control:
3 Back up heater operate follow normal operation.
4 Solar 3 way valve operates follow solar operation specification.
5 2 ways valve control:
o
2 ways valve opens.
42
Heat Mode Operation Time Chart
On
Off
On
Off
3 ways valve
Mode On
HeatPump
Thermo Off
HeatPump
Thermo On
On
Off
ID Water Pump
Backup Heater
On
Off
Backup Heater
Startup Timer
Heater On
Heater Off
Heater Off
Heater On
Timer for backup
heater to on back
from previous off
Backup Heater
Startup Timer
On
Off
Solar 3 way valve
Open
Close
2 ways valve
On
Off
Solar Request
Heat Pump
43
12.1.3 Cooling Operation
12.1.3.1 Thermostat
control
Compressor is OFF when Water Outlet Temperature – Internal Water Setting Temperature > -1.5°C for
continuously 3 minutes.
Compressor is ON after waiting for 3 minutes, if the Water Outlet Temperature – Water Inlet Temperature
(temperature at thermostat OFF is triggered) >3°C.
12.1.3.2 Cool
Mode
Operation
1 3 ways valve control:
o
3 ways valve switch and fix to cooling side.
2 Heat pump operates follow normal cooling operation.
3 Back up heater DOES NOT operate during cool mode.
4 Solar 3 way valve operates follow solar operation specification.
5 2 ways valve control:
3 Back up heater DOES NOT operate during cool mode.
4 Solar 3 way valve operates follow solar operation specification.
5 2 ways valve control:
o
2 ways valve is closed.
Cool Mode Operation Time Chart
Mode On
HeatPump
Thermo Off
HeatPump
Thermo On
On
Off
On
Off
3 ways valve
Backup Heater
On
Off
On
Off
Solar 3 way valve
Open
Close
2 ways valve
On
Off
Solar Request
Heat Pump
Solar Off due to
tank > solar temp.
44
12.1.4 Auto Mode Operation
Outdoor Ambient
Cool To Heat
Setting Temp.
COOL
MODE
HEAT
MODE
Heat To Cool
Setting Temp.
Control details:
o
To enable the unit to operate either heat or cool mode automatically, heat to cool set temperature and
cool to heat set temperature can be set by control panel.
o
Automatic operation is judged based on control panel setting temperature and outdoor ambient
temperature.
* Minimum setting of heat to cool set temperature is 1°C higher than cool to heat set temperature.
Judgement control:
o
If outdoor ambient temperature < Heat to Cool Set Temperature, unit will operate in Heat Mode or else
the unit will operate in Cool Mode.
o
If current operation is Cool mode, outdoor ambient temperature > Cool to Heat Temperature, unit will
maintain Cool mode operation or else the unit will operate Heat mode.
o
If current operation is Heat mode, outdoor ambient temperature >Heat to Cool Temperature, unit will
maintain Heat mode operation or else the unit will operate Cool mode.
o
Every 60 minutes the outdoor ambient temperature is judged.
o
When Auto + Tank mode is selected, operation mode switching is judged by both outdoor ambient
temperature and indoor air temperature.
Click on the first or last page to see other WH-MXC16G9E8 service manuals if exist.