Giatsu VAW 2 Manuel De L'utilisateur Et D'installation page 93

Inlet water temp.
A
sensor detect range
Outlet water temp.
B
sensor detect range
Evaporator coil temp. sensor
C
detect range
Return gas temp. sensor
D
detect range
Ambient temp. sensor
E
detect range
Electronic expansion valve
F
step
Temp of solar thermal
H
collector
Output voltage of electrical
P
anode
Malfunctioning of the unit and error codes
When an error occurs or the protection mode is set automatically, the circuit board and the
wired controller will both display the error message.
Protection/ Error
Malfunction code
Standby
Normal
running
P1
Lower tank
water temp.
sensor failure
P2
Upper tank
water temp.
sensor failure
P3
Evaporator
coil temp.
sensor failure
P4
Return air
temp sensor
failure
Ambient P5
-9 ~ 99°C
-9 ~ 99°C
-9 ~ 99°C
-9 ~ 99°C
0-140℃
LED
Possible reasons
indicator
Dark
Bright
1) The sensor open
circuit
☆●
(1flash 1 2) The sensor short
circuit
dark)
3) PCB board failure
1) The sensor open
circuit
☆☆●
2) The sensor short
(2 flashes 1
circuit
dark)
3) PCB board failure
1) The sensor open
circuit
☆☆☆●
2) The sensor short
(3 flashes 1
circuit
dark)
3) PCB board failure
1) The sensor open
circuit
☆☆☆☆●
2) The sensor short
(4 flashes 1
circuit
dark)
3) PCB board failure
1) The sensor open
☆☆☆☆☆
Actual testing value. Error code P1 will
-9 ~ 99°C
be shown in case of a malfunction
Actual testing value. Error code P2 will
-9 ~ 99°C
be shown in case of a malfunction
Actual testing value. Error code P3
will be shown in case of a malfunction
Actual testing value. Error code
PP4 will be shown in case of a
malfunction
Actual testing value. Error code
PP5 will be shown in case of a
malfunction
N*10 step
Measured value，if failure，show P6
Actual=display value x 10
0-5
1) Check the sensor
connection
2) Replace the sensor
3) change the PCB board
1) Check the sensor
connection
2) Replace the sensor
3) change the PCB board
1) Check the sensor
connection
2) Replace the sensor
3) change the PCB board
1) Check the sensor
connection
2) Replace the sensor
3) change the PCB board
1) Check the sensor
82
Corrective actions