Water Pump - Panasonic WH-SDC03H3E5 Service Manual

12.2

Water Pump

12.2.1 Water Pump Control

Once the indoor unit is ON, the water pump will be ON immediately and no error judgment for 70 seconds.
However, during this 70 seconds operation, 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 for 62 seconds. If water flow level is
detected low continuously 20 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.
OFF Water Pump
Pump ON Request
ON Water Pump
Pump ON Time
NO
Water Flowrate Abnormal
YES
≥ 70 Sec?
YES
> 15 Sec?
YES
96
NO
H62 Error Display
at Remote Controller