Heating Outdoor Ambient Thermo Off Control; Quiet Operation; Anti Freeze Control - Panasonic WH-ADC0916G9E8 WH-UX09FE8 Service Manual

12.13 Heating Outdoor Ambient Thermo OFF Control


Purpose:
To stop provide heating to room side during high outdoor ambient condition
o

Control content:
Heating outdoor ambient thermo off control only effective when heat pump operates in heat mode to room
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side. (This control will not activate when running in tank side)
Heat pump and water pump will turn OFF when outdoor ambient is higher than outdoor thermo off set
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temperature.
Heat pump will ON back when outdoor ambient temperature < Outdoor thermo off set temperature + [1°C].
o

12.14 Quiet Operation


Purpose:
To provide quiet operation compare to normal operation by reduces outdoor unit noise.
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
Starting condition:
When quiet button is presses.
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When quiet is request to ON by weekly timer. (Refer to control panel)
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
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

Cancellation condition:
Cancel by pressing quiet button.
o
Stop by OFF/ON button
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When quiet is request to OFF by weekly timer.
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12.15 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:
Outdoor ambient temp. < 3°C
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 Expansion tank anti freeze heater OFF condition:
Outdoor ambient temp. > 4°C
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2. Water pump circulation anti freeze control
 Water pump turns ON when ALL below conditions are fulfilled:
Heatpump OFF (stand by) OR error occurs.
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Water flowing flag is ON.
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Water flow switch is not abnormal.
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Outdoor ambient temp. < 3°C OR outdoor ambient temp. sensor is abnormal.
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Water inlet/outlet temp. < 6°C.
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After 5 minutes from previous water pump OFF.
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Outdoor thermo off set
temperature + 3°C
OFF
Outdoor thermo off set temperature +
ON
1°C
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