Panasonic WH-MXC16G9E8 Service Manual page 71

Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority SET condition)
When solar 3 way valve turn on during Tank interval, cancel
Tank interval immediately and switch 3-way valve to the
room side and start a heating/cooling interval.
T2
tank side
3 way valve
Heatpump
On
Off
T3
Booster
On
heater
Off
Solar request
On
Off
Solar 3 way
valve
On
Off
Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority NOT SET condition)
tank side
3 way valve
Heatpump
On
Off
T3
Booster
On
heater
Off
Solar request
On
Off
Solar 3 way
On
valve
Off
T1
room side
Booster heater Off as solar
3 way valve On
T2
After heating/cooling interval, stand by to go in tank side after solar 3 way
valve request off, and fulfil tank therno on (heat pump)
T1
T2
room side
T3
71
T2
T1
Booster heater On as
solar 3 way valve Off
T1
Heat pump
Thermo Off
Booster Heater
Thermo Off
due to upper limit
T1 - Heating
T2 - Tank interval
T3 - Booster heater delay timer
Solar off