HTW VAW -AT-O-100VAWE Manuel De L'utilisateur Et D'installation page 79

High pressure
protection (HP
Switch)
Low pressure
protection (LP
Switch)
Over heat
protection
(HTP Switch)
Solar thermal
collector high
tem protection
☆☆☆☆☆☆●
E1
(6 flashes 1 dark)
☆☆☆☆☆☆☆●
E2
(7 flashes 1 dark)
☆☆☆☆☆☆☆☆●
E3
(8 flashes 1 dark)
☆☆☆☆☆☆☆☆☆☆☆
E4
(11 flash1 dark)
1) Too high air
inlet temp
2) Less water in
the tank
3) The electronic
expansion valve
assembly
blocked
4) Too much
refrigerant
5) The switch
damaged
6) The
uncompressed
gas is in
refrigerant
system
7) PCB board
1) Too low air
inlet temp
2) The electronic
expansion valve
assembly
blocked
3) Too less
refrigerant
4) The switch
damaged
5) The fan
assembly can not
6 PCB board
1) Too high tank
water temp
2) The switch
damaged
3) PCB board
1) solar water
circuit water
flow very little
water flow
2) Related
●
connecting
3) Water pump
4) PCB board
32
1) Check if the air inlet
temp is over the
working limited
2) Check if the tank is
full of water. If not,
charge water
3) Replace the
electronic expansion
valve assembly
4) Discharge some
5) Replace a new
6) Discharge and then
recharge the refrigerant
7) change the PCB
failure
1) Check if the air inlet
temp is over the
working limited
2) Replace the
electronic expansion
valve assembly
3) Charge some
4) Replace a new
5) Check if the fan
working when the
compressor working. If
work
not, some problems
with the fan assembly
failure
6) change the PCB
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
failure 2) Replace a new
3) Change the PCB
1) Solar water circuit
fluid infusion and
or without
2) Related connecting
3) Change the water
wires off
4) change the PCB
failure
refrigerant
switch
board
refrigerant
switch
board
temp,
switch
board
exhaust
wires being
reconnected
pump
board