HTW VAW 2 - Page 92

temp. sensor
failure
●
(5 flashes 1
dark)
circuit
2) The sensor short
circuit
3) PCB board failure
connection
2) Replace the sensor
3) change the PCB board
Solar temp.
sensor failure
P6
☆ ☆ ☆☆☆
☆ ☆ ☆☆ ☆
● (10
flash1dark)
1) The sensor open
circuit
2) The sensor short
circuit
3) PCB board failure
1) Check the sensor
connection
2) Replace the sensor
3) change the PCB board
Emergency
switch off
EC only show
the
protection
code
1) Connecting wire off
2) PCB board failure
1) According to the physical
truth judging whether is
normal or not
2) change the PCB board
High
pressure
protection
(HP Switch)
E1
☆☆☆☆☆
☆
●
(6 flashes 1
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 failure
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
refrigerant
5) Replace a new switch
6) Discharge and then
recharge the refrigerant
7) change the PCB board
Low pressure
protection
(LP Switch)
E2
☆☆☆☆☆
☆☆●
(7 flashes
1 dark)
1) Too low air inlet
temp
2) The electronic
expansion valve
assembly blocked
3) Too less refrigerant
switch
4) The
damaged
5) The fan assembly
can not work
6 PCB board failure
1) Check if the air inlet temp
is over the working limited
2) Replace the electronic
expansion valve assembly
3) Charge some refrigerant
4) Replace a new switch
5) Check if the fan working
when the compressor
working. If not, some
problems with the fan
assembly
6) change the PCB board
88
Electronic
anode
output open
or
shortcircuit
P7
Electronic
anode
output voltage
exceeds
normal
working range
P8
1)Lack of tank water
2)Circuit of electronic
anode is open or short
3) PCB board failure
1
）
Fill the tank with water
2
）
Connect the circuit well or
replace an electronic anode
3
）
Replace a PCB board
1)The water quality is
abnormal
2)Lack of tank water
3
）
Circuit of electronic
anode is open or short
4
）
PCB board failure
1)Install water purifying plant
to improve the water quality
2)Fill the tank with water
3)Connect the circuit well or
replace an electronic anode
4
）
Replace a PCB board