HTW HTW-ATS-O-300VAX, Owners And Installation Manual

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63
Over heat
protection
(HTP
Switch)
E3
☆
●
(8 flashes 1
dark)
1) Too high tank water
temp
2)
The switch
damaged
3) PCB
board failure
1) If the tank water temp is
over 85C, the switch will
open and the unit will stop for
protection. After the water
comes to normal temp,
2) Replace a new switch
3)
Change the PCB board
Solar thermal
collector high
tem
protection
E4
☆ ☆ ☆ ☆ ☆
☆ ☆ ☆ ☆ ☆
☆
●
(11flash1
dark)
1) solar water circuit
water flow very little
or without
water flow
2) Related connecting
wires off
3)
Water pump failure
4) PCB board failure
1) Solar water circuit fluid
infusion and exhaust
2) Related connecting wires
being reconnected
3)
Change the water pump
4) change the PCB board
Water flow
failure
E5
☆ ☆ ☆ ☆ ☆
☆ ☆ ☆
(9
☆ ●
flash
1dark)
1) solar water circuit
water flow very little or
without water flow
2)
Related connecting
wires off
3) water pump failure
4) water flow
switch
failure
5) PCB board failure
1) Solar water circuit fluid
infusion and exhaust
2) Related connecting wires
being reconnected
3)
Change the water pump
4) Change the water flow
switch
5) Change the PCB board
Defrost
Defro
sting
indica
te
☆ ☆☆☆
☆
……
( all long
flashes)
Communicati
on failure
E8
Bright
MAINTENANCE
Maintenance activities
In order to ensure an optimum operation of the unit, a number of checks and inspections on the unit
and the field wiring have to be carried out at regular intervals, preferably yearly.

Check the water supply and air vent frequently, to avoid lack of water or air in the water loop.

Clean the water filter to keep a good water quality. Lack of water and dirty water can damage
the unit.

Keep the unit in a place where it is dry and clean, and which has good ventilation. Clean the
heat exchanger every one to two months.

Check each part of the unit and the pressure of the system. Replace the defect part if there is
any, and recharge the refrigerant if it is required.
☆ ☆ ☆ ☆ ☆
☆ ☆
☆
☆