Panasonic WH-MXC16G9E8 Service Manual ▷ View online
65
12.8 Indoor Back-Up Heater Control
12.8.1 Indoor Electric Heater Control
1 Normal Heating Mode
o
Heater On condition:
a. Heater switch is ON
b. After Heatpump thermo ON for [30] mins
c. After water pump operate [9] mins
d. Outdoor air temperature < Outdoor set temperature for heater
e. When water outlet temperature < Water set temperature + [-8°C]
f. [20] minutes since previous Backup heater Off
b. After Heatpump thermo ON for [30] mins
c. After water pump operate [9] mins
d. Outdoor air temperature < Outdoor set temperature for heater
e. When water outlet temperature < Water set temperature + [-8°C]
f. [20] minutes since previous Backup heater Off
* When heatpump cannot operate due to error happens during normal operation, heater will go into
force mode automatic
* Heater need to operate during deice operation
o
Heater Stop Condition:
a. When outdoor set temperature > outdoor set temperature + [+2°C] for continuous 15 secs OR
b. When water out temp> water set temperature + [-2°C] for continuous 15 secs OR
c. Heater switch is Off OR
d. Heatpump thermo-off or OFF condition
b. When water out temp> water set temperature + [-2°C] for continuous 15 secs OR
c. Heater switch is Off OR
d. Heatpump thermo-off or OFF condition
2 Force Heater Mode
o
Heater On condition:
a. After water pump operate [9] mins
b. When water outlet temperature < water set temperature + [-8°C]
c. [20] minutes since previous Backup heater Off
b. When water outlet temperature < water set temperature + [-8°C]
c. [20] minutes since previous Backup heater Off
o
Heater Stop condition
a. Force mode off OR
b. When water outlet temperature > water set temperature + [-2°C] for continuous 15 secs
b. When water outlet temperature > water set temperature + [-2°C] for continuous 15 secs
* Do not operate heater at the following situation
1 Water outlet temperature sensor, and water inlet sensor abnormal
2 Flow switch abnormal
3 Circulation pump stop condition
4 During Heatpump switch to tank side
1 Water outlet temperature sensor, and water inlet sensor abnormal
2 Flow switch abnormal
3 Circulation pump stop condition
4 During Heatpump switch to tank side
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12.9 Tank Booster Heater Control
12.9.1 Tank Booster Heater Control
Heating operation condition:
Tank set temperature +
[-7°C]
[-7°C]
Tank set temperature +
[+2°C]
[+2°C]
Heater OFF
Heater ON
1 Booster heater Turn On condition:
o
After BOOSTER HEATER DELAY TIMER fulfill during heatpump startup time in tank mode, or during
switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not
set).
switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not
set).
o
Tank temperature < Tank set temperature + [-5°C],
o
20 minutes since previous heater off.
* BOOSTER HEATER DELAY TIMER is clear when tank heat-up interval end.
2 Booster heater Turn Off condition:
o
Tank temperature > Tank set temperature + [+2°C] for continuous 15 sec
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
heat-up interval
heat-up interval
* DELAY TIMER can be set by control panel.
12.10 Base Pan Heater Control (Optional)
To enable the base pan heater function, control panel initial setting has to be manually adjusted by activating
Base Pan Heater menu.
There are 2 optional start condition can be selected, Type A or Type B.
Control details:
1 Type A: (Default Auto Mode)
Start conditions:
o
o
When outdoor air temperature ≤ 3°C during heating and deice operation is ON.
Control contents:
o
Base pan heater is ON during deice operation and continues ON for 10 minutes after deice operation
ends.
ends.
Cancel condition:
o
When outdoor temperature > 6°C after deice end or
o
When operation is not at heating mode or
o
Base pan heater ON timer count is completed.
2 Type B: (ON Mode)
Start conditions:
o
o
When outdoor air temperature is ≤ 5°C and operates in heating mode, base pan heater is ON.
Cancel conditions:
o
When outdoor air temperature is > 7°C or
o
When operation is not at heating mode.
Note:
* Base pan heater cannot be ON during test mode and stand by mode.
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12.11 Sterilization Mode
Purpose:
o
To sterilize water tank by setting the required boiling temperature.
Control start condition:
o
Tank connection menu is set to YES by control panel.
o
Sterilization menu is set to YES by control panel.
o
Sterilization signal received from control panel by timer.
Control stop condition:
o
After sterilization timer completed or
o
After 4 hours of operation since sterilization function starts.
Control content:
o
Once the sterilization function is enable, set the target sterilization set temperature.
o
Booster heater will allow to ON during solar SET condition.
Booster heater OFF Temp = Sterilization set temperature +0°C
Booster heater ON Temp = Sterilization set temperature -7°C
o
Sterilization timer which set by control panel will start count after tank achieve sterilization set temperature.
o
Target tank temperature will set back to normal tank set temperature.
* Tank heater control is not affected by solar pump when solar priority set.
12.12 Quiet Operation
Purpose:
o
To provide quiet operation compare to normal operation by reduces outdoor unit noise.
Starting condition:
o
When quiet button is presses.
o
When quiet is request to ON by weekly timer. (Refer to control panel)
When any of above mentioned condition is achieved, this control is activated.
New target FM speed = Present target FM speed – 80 rpm
Minimum target FM speed = 200 rpm
Minimum target FM speed = 200 rpm
Cancellation condition:
o
Cancel by pressing quiet button.
o
Stop by OFF/ON button
o
When quiet is request to OFF by weekly timer.
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12.13 Anti Freeze Control
Anti freeze protection control menu can be set YES or NO by control panel.
In heatpump system, there are 3 types of anti freeze control:
1. Expansion tank anti-freeze control
Expansion tank anti freeze heater ON condition:
o
Outdoor ambient temp. < 3°C
Expansion tank anti freeze heater OFF condition:
o
Outdoor ambient temp. > 4°C
2. Water pump circulation anti freeze control
Water pump turns ON when ALL below conditions are fulfilled:
o
Heatpump OFF (stand by) OR error occurs.
o
Water flowing flag is ON.
o
Water flow switch is not abnormal.
o
Outdoor ambient temp. < 3°C OR outdoor ambient temp. sensor is abnormal.
o
Water inlet/outlet temp. < 6°C.
o
After 5 minutes from previous water pump OFF.
Water pump turn OFF when ANY of below conditions is fulfilled:
o
Outdoor ambient temperature ≥ 4°C.
o
During -5°C < outdoor ambient temp. < 4°C
After water pump ON for 4 minutes, and water inlet temp. ≥ 8°C.
Else, shift to back up heater anti freeze control.
o
During outdoor ambient temp. < -5°C
After water pump ON for 4 minutes, and water inlet/outlet ≥ 20°C.
Else, shift to back up heater anti freeze control.
However, if flow switch is abnormal (H62), then water pump circulation anti freeze control will not activate.
3. Back up heater anti freeze control:
Back up heater turn ON when ALL below conditions is fulfilled:
o
Water inlet/outlet temp. < 6°C.
o
Water pump circulation anti freeze control activated and water pump ON for 4 minutes.
Back up heater turns OFF when ANY of below conditions is fulfilled:
o
Water inlet/outlet temp. > 28°C.
o
Water pump circulation anti freeze control deactivated/water pump OFF.
However, if back up heater is abnormal (H70) then back up heater anti freeze control will not activate.
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