Panasonic WH-MXC16G9E8 Service Manual ▷ View online
73
12.15 External Room Thermostat Control (Optional)
Purpose:
1 Better room temperature control to fulfill different temperature request by external room thermostat.
Recommended external room thermostat:
Maker
Characteristic
Siemen (REV200)
Touch panel
Siemen (RAA20)
Analog
Connection of external room thermostat:
Wire Connection and thermo characteristic of Siemen REV200:
Wire Connection and thermo characteristic of Siemen REV200:
Setting
L/L1 (H)
Heat Thermo
L/L2 (C)
Cool Thermo
Set Temp < Actual Temp
Open Circuit
OFF
Short Circuit
ON
Set Temp > Actual Temp
Short Circuit
ON
Open Circuit
OFF
Cooling
Heating
Siemen REV200
Connect only heating line for heating only model. And connect both
heating and cooling line for heat + cool model.
heating and cooling line for heat + cool model.
Indoor Unit
9
L (label)
10
11
12
L1 (label)
L2 (label)
9 : Terminal Bord No.
Wire Connection and thermo characteristic of Siemen RAA20:
Setting
L/Y1 (H)
Heat Thermo
L/Y2 (C)
Cool Thermo
Set Temp < Actual Temp
Open Circuit
OFF
Short Circuit
ON
Set Temp > Actual Temp
Short Circuit
ON
Open Circuit
OFF
Cooling
Heating
Siemen RAA20
Connect only heating line for heating only model. And connect both
heating and cooling line for heat + cool model.
heating and cooling line for heat + cool model.
Indoor Unit
9
L (label)
10
11
12
Y1 (label)
Y2 (label)
9 : Terminal Bord No.
Control Content:
External room thermostat control activate only when remote thermostat connection select YES by Indoor control
panel.
When indoor running heat mode, refer thermo On/Off from heating line feedback. And when indoor running cool
mode, refer thermo On/Off from cooling line feedback.
Heat pump Off immediately when receive thermo off feedback.
74
12.16 Three Ways Valve Control
Purpose:
- 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side.
Control contents:
1 3 ways valve switch Off:
o
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
2 3 ways valve switch On:
o
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3 Stop condition:
o
During stop mode, 3 ways valve will be in switch off position.
L
N2
Indoor Unit
N1
Spring Return 2 point
SPDT 3 wire
5
4
4
M
L
6
N1
5
N2
COM
Open
Close
4
6: Terminal Bord No.
M
L
NC
6
N1
5
N2
4
M
L
NO
6
N1
5
N2
4
6
AC230V
* During pump down and force mode, fix 3 ways valve in close condition.
* Recommended Parts : SFA 21/18 (Siemens)
12.17 Two Ways Valve Control
Functionality of 2 ways valve:
Use to allow hot water to floor heating panel or block cold water to floor heating panel.
Control contents:
1 When indoor running in heat mode, OPEN the 2 ways valve.
2 When indoor running in cool mode, CLOSE the 2 ways valve.
3 Stop condition:
2 When indoor running in cool mode, CLOSE the 2 ways valve.
3 Stop condition:
a.
During stop mode, fix 2 ways valve in close condition.
L
N2
Indoor Unit
N1
Spring Return 2 point
SPDT 3 wire
2
1
1
M
L
3
N1
2
N2
COM
Open
Close
1
3: Terminal Bord No.
M
L
NC
3
N1
2
N2
1
M
L
NO
3
N1
2
N2
1
3
AC230V
* During pump down mode, fix 2 ways valve in close condition.
* During force mode, open 2 ways valve.
* During force mode, open 2 ways valve.
* Recommended Parts : SFA 21/18 (Siemens)
75
12.18 External OFF/ON Control
Communication circuit between indoor unit and external controller is as per below.
External
Controller
Controller
Panasonic
PCB
CN-THERMO
17
18
18
5V
12V_4
R25
1k
R23
10k
R1
1
4
2
3
ZD2
PC1
G2 G2
C30
0.01µ
16V
Maximum length of communication cable is 20 meter.
Control content:
External Control Switch
Control Panel OFF/ON
Control Panel Power LED
System Status
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
REMOTE
ON
ON
ON
ON
OFF
OFF
UNIT
OFF
OFF
OFF
ON
CONTROLLER
During EXTERNAL SW OFF,
display “EXT SW OFF”
LED
REMOTE
CONTROLLER
SIGNAL
REMOTE
CONTROLLER
SIGNAL
EXTERNAL
CONTROLLER
SWITCH
CONTROLLER
SWITCH
OPERATION
ACTUAL
HEATER
BOOSTER
QUIET
SETTING
STATUS
SERVICE
AUTO
HEAT
COOL
TANK
HEATER
FORCE
°C
°C
ON
OFF
MON TUE WED THU
FRI
SAT SUN
hr
hr
kwh
* During External Switch OFF condition, it is allow to change the setting and also timer operation.
76
12.19 Holiday Mode
Purpose:
Promotes energy saving by allowing the user to stop the system during holiday and enables the system to
resume at the preset temperature after holiday.
resume at the preset temperature after holiday.
Control details:
o
Range of days can be set in holiday mode is from 1 to 999 days.
o
After days of holiday have been set, heat pump will stop and only resume operation at 12.00am at the
end of holiday countdown.
Start condition:
o
Unit is OFF and holiday mode is set.
* The day the holiday mode was set is counted as day 1.
Stop condition:
o
OFF/ON button is pressed.
o
Holiday counter is reached.
12.20 Dry Concrete Function
Purpose
Provide heat to floor heating panel and dry the wet concrete during installation.
Setting condition:
o
Dry concrete parameter can be set through control panel by selecting dry concrete menu.
o
Parameters are possible to set up to 99 days with different target set temperature.
Control details:
o
Dry concrete operation can be activate under Service Mode 3.
o
Once dry concrete function start, day 1 setting temperature will be send to indoor unit by control panel.
o
Unit will operate heat mode with dry concrete preset water outlet temperature. (No shift value added to
the preset water outlet temperature)
o
After complete day 1 setup operation, day 2 data will be send to indoor at 12.00am on the second day.
o
Each preset data will be send everyday until dry concrete mode is complete, unit will turns OFF and exit
dry concrete function.
o
3 ways valve and booster heater will turn OFF and 2 ways valve will turns ON.
Cancel condition:
o
Unit will turns OFF and exit dry concrete function.
o
OFF signal is received by pressing OFF/ON button or error H76 is occurred.
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