Giatsu VAW 2 Manuel De L'utilisateur Et D'installation page 95

E3
Over heat
protection
(HTP Switch)
E4
Solar thermal
collector high
tem
protection
E5
Water flow
failure
Defro
sting
Defrost
indica
te
Communicati E8
on failure
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.
1) Too high tank water
☆ ☆ ☆ ☆ ☆
☆ ●
☆ ☆
temp
(8 flashes 1
2)
dark)
damaged
3) PCB board failure
1) solar water circuit
water flow very little
☆ ☆ ☆ ☆ ☆
or without water flow
☆ ☆ ☆ ☆ ☆
2) Related connecting
☆ ●
wires off
(11flash1
3) Water pump failure
dark)
4) PCB board failure
1) solar water circuit
water flow very little or
without water flow
☆ ☆ ☆ ☆ ☆
2) Related connecting
☆ ☆ ☆ ☆ ●
wires off
(9 flash
3) water pump failure
1dark)
4) water flow switch
failure
5) PCB board failure
☆ ☆☆☆ ☆
☆ ......
☆
( all long
flashes)
Bright
1) If the tank water temp is
over 85C, the switch will
open and the unit will stop for
The switch
protection. After the water
comes to normal temp,
2) Replace a new switch
3) Change the PCB board
1) Solar water circuit fluid
infusion and exhaust
2) Related connecting wires
being reconnected
3) Change the water pump
4) change the PCB board
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
84