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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 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.
t ≥ 9 min
YES
NO
NO
Flow
S/W
Status
tc < 1min
NG
STOP Water pump
OK
Water Pump Control
ON Water pump
YES
ERROR display at
Control Panel
ERROR reset by
power reset
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