Water Pump - Panasonic WH-ADF0309J3E5CM Service Manual

During Tank heat-up interval
o
Tank interval is the first mode running when heat + 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 heating heat-up interval
o
Follow normal room heater control operation.

4. Tank heater control:
During heating heat-up interval
o
Internal tank heater will not function under heating heat-up interval.

During tank heat-up interval
o
Internal tank heater will turn ON after heat pump thermo off to boil tank temperature to tank set

temperature.
2 ways valve control is open
o
Indoor water pump control:
o
Indoor water pump always turn ON if room heat pump thermo ON OR Tank thermo ON.


14.2 Water Pump

14.2.1 Water Pump Control
 Once the indoor unit is ON, the water pump will be ON immediately, if there is any abnormality cause at outdoor
or malfunction, the compressor should be OFF immediately and restart delay after 3 minutes.

The system will start checking on the water flow level after operation start. If water flow level is detected low
continuously 160 seconds, the water pump and the compressor will be OFF permanently and OFF/ON control
panel LED will blink (H62 error occurs).

When error happens, the power has to be reset to clear the error.

If there is no error indication, the water pump shall be continuously running.

The water pump will remain ON when compressor OFF due to thermostat OFF setting is reached.

Water pump will OFF when room thermo OR tank thermo OR buffer tank thermo OFF.

Water pump will delay 15 seconds to turn OFF when request to OFF except during anti-freeze deice activate or
air purge mode.
Maximum pump speed setting on remote control
1) When Pump flowrate setting is ΔT
Standard pump speed is automatically controlled to get the designed water temperature different between water
inlet and outlet (ΔT). The maximum pump speed setting limitation can be adjusted by the installer according to
water circuit pressure drop condition.
Pump ON Request
ON Water Pump
NO
Water Flowrate Abnormal
OFF Water Pump
YES
> 160 Sec?
YES
H62 Error Display
at Remote Controller
182