HTW VAW -AT-O-100VAWE Manuel De L'utilisateur Et D'installation page 78

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
Lower tank
water temp.
sensor failure
Upper tank
water temp.
sensor failure
Evaporator coil
temp. sensor
failure
Return air temp
sensor failure
Ambient temp.
sensor failure
Solar temp.
sensor failure
Emergency
switch off
LED indicator
Dark
Bright
☆●
P1
(1flash 1 dark)
☆☆●
P2
(2 flashes 1 dark)
☆☆☆●
P3
(3 flashes 1 dark)
☆☆☆☆●
P4
(4 flashes 1 dark)
☆☆☆☆☆●
P5
(5 flashes 1 dark)
☆☆☆☆☆☆☆☆☆☆●
P6
(10 flash1dark)
only show the protection
EC
code
Possible
reasons
1) The sensor
open circuit
2) The sensor
short circuit
3)PCB board
failure
1) The sensor
open circuit
2) The sensor
short circuit
3) PCB board
failure
1) The sensor
open circuit
2) The sensor
short circuit
3) PCB board
failure
1) The sensor
open circuit
2) The sensor
short circuit
3) PCB board
failure
1) The sensor
open circuit
2) The sensor
short circuit
3) PCB board
failure
1) The sensor
open circuit
2) The sensor
short circuit
3) PCB board
failure
1) Connecting
wire off
2) PCB board
failure
31
Corrective actions
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
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) According to the
physical truth
judging whether is
normal or not
2) change the PCB
board