Quiet Operation; Solar Operation (Optional) - Panasonic WH-MDC09C3E5 Servise Manual

12.13. Quiet Operation

• Purpose:
- To provide quiet operation compare to normal operation by reduces Monobloc unit noise.
• Starting condition:
1. When quiet button is presses.
2. When quiet request ON time by weekly timer (Refer to remote control.)
• 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:
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:
• Control according to preset whether Solar Priority is set or not.
• When tank connection is NOT set at SETTING mode, Solar operation is disabled.
• 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:
• Solar pump operates if all of the following conditions are fulfilled:-
i) Power On. (regardless operation ON or OFF)
ii) There is operation request from Solar pump station.
iii) Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.
2. Stop condition:
• Solar pump stops operating when:-
í) No power supply to unit OR
ii) There is NO operation request from Solar pump station OR
iii) Tank hot water temp is above solar off upper limit temp [EEPROM 2 : 77]°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
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