Hydro-Pro Hydro-Pro+ Premium 22M, Installation Instructions Manual

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5. Maintenance and Inspection
5.1. Maintenance

Check the water supply device and the release often. You should avoid the condition of no
water or air entering into system, as this will influence unit's performance and reliability.
You should clear the pool/spa filter regularly to avoid damage to the unit as a result of the
dirty of clogged filter.

The area around the unit should be dry, clean and well ventilated. Clean the side heating exchanger regularly to
maintain good heat exchange as conserve energy.

The operation pressure of the refrigerant system should only be serviced by a certified technician.

Check the power supply and cable connection often. Should the unit begin to operate abnormally, switch it off
and contact the qualified technician.

Discharge all water in the water pump and water system ,so that freezing of the water in the pump or water
system does not occur. You should discharge the water at the bottom of water pump if the unit will not be used
for an extended period of time. You should check the unit thoroughly and fill the system with water fully before
using it for the first time after a prolonged period of no usage.
5.2. Trouble Shooting Guide
Malfunction LCD controller Reason Resolution
Water inlet temp. Sensor failure PP1 The sensor is open or short circuit Check or change the sensor
Water outlet temp. Sensor failure PP2 The sensor is open or short circuit Check or change the sensor
Coil sensor failure PP3 The sensor is open or short circuit Check or change the sensor
Ambient sensor failure PP5 Check or change the sensor Coil sensor failure
Temp. Differential between water-
in and water-out is too large
PP6
Water flow volume not enough,
water pressure difference is too
low Check the water flow volume or
system obstruction
Anti freezing under cooling mode
PP7
Outlet water is too low Check the water flow volume or
outlet water temp. Sensor
The first time freezing protection
in winter
PP7
Ambient or inlet water temp. is too
low
The second time freezing
protection in winter
PP7
Ambient or inlet water temp. is too
lower
High pressure protect
HP
The sensor is open or short circuit Check trough the high pressure
switch and the gas system
pressure to judge whether the gas
loop is blocked or the freon is
suitable
Low pressure protect
LP
The sensor is open or short circuit Check trough the high pressure
switch and the gas system
pressure to judge whether there is
leaking or the freon is not enough
Flow switch failure
Light
Water flow volume not enough,
water pressure difference is too
low Check the water flow volume,
water pump and flow switch is
failure or not
3times water-in and water-out
temp. difference protection in 30
minutes
EE5
Water flow rate not enough Check the water flow rate, or
water system is jammed or not
Defrosting Defrost code
display
Communication failure
EE8
LED controller and the PCB
connection failure Check the wire connection