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6. Maintenance and Inspection
6.1 Maintenance
To check the water supply device and the releaser often. You should avoid the condition of no water or air enter
into system, or that will influence unit's performance and reliability. You should clear the water filter regularly to
avoid unit's damage by filter's jam.
There should be dry, sanitary and ventilation around the units. To clean the side heating exchanger regularly for
keeping good heating exchanging and saving energy.
To check the operation of every process in the u nit, the operation pressure of the refrigerant system.
You should maintain or change it in time.
To check the power supply and cable connection often, there is abnormal action or bad smell about the electrical
component. If there is, please maintain or change it in time.
Please discharge all water in the water pump and water system lest freeze the water pump or water system.
You should discharge the water at the bottom of water pump if the units will stop for long time. And you
should check the units thoroughly and fill the system with water fully before power on the units again.
6.2 Trouble shooting guide
malfunction
Water in temp.
Sensor failure
Water out temp.
Sensor failure
Coil1 sensor failure(Heating mode)
Gas return sensor failure
Ambient sensor failure
Temp. is too much
different
between
water-in and water-out
High pressure protection
Low pressure protection
Flow switch failure
3times display PP06 (
Temp.
is too much different between
water-in&out)
in 30minutes
Communication failure
Controller
Reason
display
The sensor is open
PP 01
or short circuit
The sensor is open
PP 02
or short circuit
The sensor is open
PP 03
or short circuit
The sensor is open
PP 04
or short circuit
The sensor is open
PP 05
or short circuit
PP 06
Water volume isn't enough
Refrigerant system pressure is high
EE 01
Refrigerant system pressure is low
E E02
No water/little water
EE 03
in water system.
Water flow volume not
enough,
EE 05
pressure difference is
too low
Wire controller and The
EE 08
PCB connection failure
3
14
Check or replace a new sensor
Check or replace a new sensor
Check or replace a new sensor
Check or replace the sensor
Check or replace the sensor
Increase water volume
Check pressure gauge,increase the
water volume
Check pressure gauge,refeed refrigerant
Check the water flow volume,
water pump is failure or not
Check the water flow volume, or
water
water system is jammed or not
Check the wire connection
EN
resolution
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