Panasonic WH-MXC16J9E8 Service Manual page 93

During tank heat-up interval
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
Tank interval is the first mode running when the cool + tank mode is select.

Switch to room interval only when tank achieve tank thermo OFF OR tank heat-up interval timer is
complete.

Heat pump operates according to normal tank mode operation.
3 Room heater control:
During room cooling interval
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
Room heater is OFF and not operates.
4 Tank heater control:
During room cooling interval
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
If External tank heater is select.

External heater ON/OFF according to external tank heater operation control.

If internal tank heater is select and tank heater ON

Internal tank heater will not function under room cooling interval.
During tank heat-up interval
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
If External tank heater is select.

Once room cooling interval switch to tank heat-up interval, tank heater will turn OFF and tank
heater delay timer will start counting.

Tank heater turns ON after tank heater delay timer is fulfill and tank temperature is lower than
tank set temperature.

Tank heater delay timer is clear when switch to room cooling interval.

If internal tank heater is select and tank heater ON.

Internal tank heater will turn ON after heat pump thermos off to boil tank temperature to tank set
temperature.
5 2 ways vale is close.
6 Indoor water pump control:
Indoor water pump always turn ON if room heat pump thermo ON OR Tank thermo ON.
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13.1.12 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.
Compressor:
Outdoor Fan:
ON
OFF
Fan Speed
ON
30 sec
93
OFF
ON
ON