Water Pump - Panasonic WH-SDC12F6E5 Service Manual

13.2

Water Pump

13.2.1 Water Pump Control

Once the indoor unit is ON, the water pump will be ON immediately and no error judgement for 9 minutes.
However, during this 9 minutes 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 9 minutes. If water flow level is
detected low continuously 10 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 must always operate during heating mode, deice operation and also during heater ON condition.

Water pump will stops 15 seconds after the unit stops operation.
Water Pump Control
NO
t ≥ 9 min
YES
Flow
S/W
Status
YES
NO
OK
tc < 1min
NG
STOP Water pump
ERROR display at
Control Panel
79
ON Water pump
ERROR reset by
power reset