Panasonic WH-SHF09D3E5, Service Manual

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12.13 Quiet Operation
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Purpose:
- To provide quiet operation compare to normal operation by reduces outdoor unit noise.
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Starting condition:
1 When quiet button is presses.
2 When quiet request ON time 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
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Cancellation condition:
1 Cancel by press quiet button
2 Stop by OFF/ON button
3 When quiet request OFF time by weekly timer
When any of above mentioned condition is achieved, this control is cancelled.
12.14 Solar Operation (Optional)
12.14.1 Solar Operation
1 External solar heat source signal can be connect to unit for proper control of heat source switching during
tank boiling time.
2 Control according to preset whether solar priority is set or not.
3 When tank connection is NOT set at SETTING mode, solar operation is disabled.
4 When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump
3 Way Valve is requested ON (Refer to figure below).
12.14.2 Solar Operation Control
When solar priority is SET
1 Operation
condition:
a Solar pump operates if all of the following conditions are fulfilled:
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Power On. (regardless operation ON or OFF)
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There is operation request from solar pump station.
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Tank hot water temp is below solar on upper limit temp 80°C.
2 Stop condition:
a Solar pump stops operating when:
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No power supply to unit OR
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There is NO operation request from solar pump station OR
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Tank hot water temp is above solar off upper limit temp 72°C.
* heat pump OFF OR operate to room side when solar pump operate during solar priority set.
* booster heater OFF when solar pump operate during solar priority set.