Panasonic WH-MXC16G9E8 Service Manual ▷ View online
57
12.1.7.2
Cooling Priority NOT SET
1. 3 ways valve control:
3 ways valve switch to room side during room cooling interval and switch to tank side during tank heat-up
interval. Both modes will switch alternately. Tank mode is the initial running mode of this cool + tank mode.
2. Heat pump operation control:-
a) During room cooling interval
Follow normal cooling operation.
Under Solar Priority Set condition:
Under Solar Priority Set condition:
Switch to tank heat-up interval and start tank heat-up timer when External Room Thermo OFF AND solar
3WV OFF AND Tank temperature < THERMO ON TEMP (End Room Interval Early) OR
Switch to tank heat-up interval and start counting tank heat-up timer when tank temperature < THERMO
ON TEMP AND solar 3VW OFF.
Under Solar Priority Not Set Condition:
Switch to tank heat-up interval and start counting tank heat-up timer when External Room Thermo OFF
AND Tank temperature < THERMO ON TEMP (End Room Interval Early) OR
Switch to tank heat-up interval and start counting tank heat-up timer when tank temperature < THERMO
ON TEMP.
* THERMO ON TEMP is defined from following tank thermo ON/OFF condition.
b) During tank heat-up interval
Tank water set temperature = tank set temperature or 55°C whichever lower.
Heat Pump Water Outlet set temperature is set to [53°C].
Initial Tank THERMO ON TEMP = heat pump tank target temperature + [-2°C].
Tank Thermo ON/OFF characteristic
o
Tank Thermo ON/OFF characteristic
o
THERMO OFF TEMP:
1)
THERMO OFF TEMP = Tank water set temperature + [0°].
2)
Tank temperature > THERMO OFF TEMP for continuous 10 seconds, 3 ways valve is switch to
room side. End Tank heat-up interval and start count cooling interval.
room side. End Tank heat-up interval and start count cooling interval.
3)
Tank temperature > Tank set temperature + [2°] for continuously 10 seconds, 3 ways valve is
switch to room side. End Tank heat-up interval and start count cooling interval.
switch to room side. End Tank heat-up interval and start count cooling interval.
o
THERMO ON TEMP:
1)
THERMO ON TEMP = Tank water set temperature + [-2°C].
2)
During cooling interval or external room thermo OFF, always detect tank temperature.
Switch to next tank heat-up interval when tank temperature < THERMO ON TEMP.
Switch to next tank heat-up interval when tank temperature < THERMO ON TEMP.
Case 2:
o
o
Heat pump THERMO OFF TEMP:
1)
Heat pump THERMO OFF TEMP = [53°C] + [+4°C].
2)
Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump
OFF.
OFF.
o
THERMO ON TEMP:
1)
THERMO ON TEMP = Water inlet when heat pump thermo OFF + [-3°C].
58
Water Inlet Thermo Condition
o
o
Heat pump THERMO OFF TEMP:
1)
Water inlet temperature > [55°C] for continuous 60 seconds, heat pump OFF.
o
THERMO ON TEMP:
1)
THERMO ON TEMP = Water inlet temperature > [55°C].
c) Solar Operation Condition (Only under Solar Priority Set Condition)
When solar pump ON, tank heat-up interval end early and 3 ways valve switch to room side.
o
THERMO ON TEMP:
1)
THERMO ON TEMP = Heat pump tank target temperature + [-2°C].
2)
After cooling interval or external room thermo OFF, always detect tank temperature.
Switch to next tank heat-up interval when tank temperature < THERMO ON TEMP.
Switch to next tank heat-up interval when tank temperature < THERMO ON TEMP.
o
Tank interval will end and start cooling interval timer, IF
1)
Tank interval timer finish AND External Room Thermo ON OR
Only when this condition occur at tank side before case 1 thermo OFF, switch to room side is
compulsory and continue until complete cooling interval and switch back to tank side.
Only when this condition occur at tank side before case 1 thermo OFF, switch to room side is
compulsory and continue until complete cooling interval and switch back to tank side.
2)
Fulfill case 1 of thermo OFF condition.
3. Backup heater control:
a)
Backup heater does not operate at Cool + Tank Mode.
4. Booster heater control:
a)
During cooling interval
o
o
Booster heater ON/OFF according to booster heater operation control.
b)
During tank heat-up interval
o
o
Once switch from cooling interval to tank heat-up interval, booster heater is turns OFF and BOOSTER
HEATER DELAY TIMER starts counting.
o
Booster heater turns ON after BOOSTER HEATER DELAY TIMER fulfill and tank temperature lower
than tank set temperature.
o
BOOSTER HEATER DELAY TIMER is clear when switch to cooling interval.
5. Solar 3 ways valve
Solar 3WV operates follow solar operation specification.
* Under solar priority is set condition, when solar 3WV is ON, booster heater turns OFF.
* Under solar priority is not set condition, solar 3WV only can ON during cooling interval.
* Under solar priority is set condition, when solar 3WV is ON, booster heater turns OFF.
* Under solar priority is not set condition, solar 3WV only can ON during cooling interval.
6. 2 ways valve control:
2 ways valve is closed.
59
12.1.8 Setting Water Outlet Temperature for Heat Mode
The set temperature defines the parameters for the outdoor ambient temperature dependent operation of the
unit. Where by the internal water setting temperature is determined automatically depending on the outdoor
temperature. The colder outdoor temperatures will result in warmer water and vice versa. The user has the
possibility to shift up or down the target water temperature by control panel setting.
temperature. The colder outdoor temperatures will result in warmer water and vice versa. The user has the
possibility to shift up or down the target water temperature by control panel setting.
Outdoor
Temp.
Temp.
Water
Temp.
Temp.
H2O HI
H2O LO
OUT LO
OUT HI
outdoor ambient set temperature
outdoor ambient set temperature
OUT LO = Low outdoor ambient set temperature
OUT HI = High outdoor ambient set temperature
H2O LO = Water outlet set temperature at low
OUT HI = High outdoor ambient set temperature
H2O LO = Water outlet set temperature at low
H2O HI = Water outlet set temperature at high
Outdoor temperature is updated every 30 minutes when operation ON.
Setting water outlet temperature always follow H20 (Lo) or H2O (Hi) whenever is higher if outdoor ambient
sensor or indoor communication error happen.
Operation under tank mode
When heat pump operate to tank side, the water outlet target temperature is 53°C.
60
12.1.9 Water Temperature Thermo Shift Setting
Switchs are ignored during “PUMPDW” = ON.
Switchs are ignored during “STATUS” = ON.
“
“
▲
”, “
▼
”, ”SELECT” switch are ignored if “SETTING” = OFF.
“CANCEL” switch is ignored if “SETTING” = OFF & “STATUS” = OFF.
If “SET” Switch pressed for less than 5secs, immediately enter water temperature shift setting mode.
Once enter this setting mode, “SETTING” display is ON.
This setting mode is used to easily shift the target water outlet temperature.
Outdoor
Temp.
Temp.
Water
Temp.
Temp.
H2O HI
+ 5
± 0
Shift value
- 5
H2O LO
OUT LO
OUT HI
OUT LO
= Low outdoor ambient set temperature
OUT HI
= High outdoor ambient set temperature
H2O LO
= Water outlet set temperature at low
outdoor ambient set temperature
H2O HI
= Water outlet set temperature at high
outdoor ambient set temperature
Shift value = Setting water temperature thermo shift
12.1.10
Outdoor Fan Motor Operation
Outdoor fan motor is adjusted according to operation condition. It starts when compressor starts operation and it
stops 30 seconds after compressor stops operation.
stops 30 seconds after compressor stops operation.
30 sec
Compressor:
ON
ON
Fan Speed
ON
ON
OFF
OFF
Outdoor Fan:
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