Malfunctioning Of The Unit And Error Codes - HTW VAW -ATS-O-150VAW Manuel De L'utilisateur Et D'installation

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

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
☆●
1 2) The sensor short
(1flash
dark) circuit
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
☆☆☆☆●
(4 flashes 1 2) The sensor short
circuit
dark)
3) PCB board failure
1) The sensor open
☆☆☆☆☆
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
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
75
Corrective actions