Hydro-Pro 7024515 - Other Malfunctions and Solutions

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Water pump running logic and error code ‘ON’.
There are two options for water pump running.
Option 1:Water pump starts or stops in relation to heat pump operation.
Water pump starts 60s before compressor, water pump start 30s and then detect the water flow switch. When the
heat pump enters standby mode, water pump will stop 60s after compressor stops. Water pump will restart to
running for 3 min then stop when the standby time is over 2 hours.
HP working mode
Condition
(Tset:Setting water temp.
T1: Inlet water temp.)
Example:
Tset = 28℃,
Water pump working logic
Heating mode
T1>Tset-1,
and last for 30 min
T1>27℃,
last for 30 minutes
Water pump will enter standby
mode for 2 hours and will not start
except turn off power supply and
restart. Heat pump will restart 3
minutes after the water pump exit
the standby mode to detect the
water temp. T1 again.
Cooling mode
T1<Tset+1,
And last for 30 min
T1<29℃,
last for 30 minutes
Water pump will enter standby
mode for 2 hours and will not start
except turn off power supply and
restart. Heat pump will restart 3
minutes after the water pump exit
the standby mode to detect the
water temp. T1 again.
In this case, it is unnecessary to deal with Error code ‘ON’ if ‘ON’ occurs in water pump’s 2 hours standby period.
Option 2
No matter when the heat pump is on (running or standby), water pump will always be running.
Water pump will run for 1 minute after manually turn off.