TESY HPWH 2.1 200 U02, Service Manual

Page: 11 / 35

Page 11 of 35
F. ACTIONS TO BE TAKEN WHEN ERROR CODE APPEARS ON DISPLAY
Protection/ Malfunction Error code LED indicator Possible reasons Corrective actions Procedure
Standby Dark
Normal running Bright
Lower tank water temp. sensor
failure
P1
☆
●
(1flash 1 dark)
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 1) Procedure 2
3) Procedure 1
Upper tank water temp. sensor
failure
P2
☆☆
●
(2 flashes 1 dark)
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 1) Procedure 3
3) Procedure 1
Evaporator coil temp. sensor
failure
P3
☆☆☆
●
(3 flashes 1 dark)
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 1) Procedure 4
3) Procedure 1
Return gas temp sensor failure P4
☆☆☆☆
●
(4 flashes 1 dark)
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 1) Procedure 5
3) Procedure 1
Ambient temp. sensor failure P5
☆☆☆☆☆
●
(5 flashes 1 dark)
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 1) Procedure 6
3) Procedure 1
Solar temp. sensor failure P6
☆☆☆☆☆☆☆☆☆☆
●
(10 flash1dark)
1) The sensor open circuit
2) The sensor short circuit
3) PCB board failure 1) Check and change the solar sensor
2) Replace the sensor
3) change the PCB board 1) Procedure 7
3) Procedure 1
T6 Solar temperature too high
temp. protection
P8 Dark 1) T6 too high temp.
2) T6 sensor has problem
1) P8 appears at 125°C and
disappears at
120°C
2) Check
and if it’s necessary replace
the sensor
2) Procedure 7
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
2) Procedure 1
High pressure protection (HP
Switch)
E1
☆☆☆☆☆☆
●
(6 flashes 1 dark)
1) Too high air inlet temp
2) Less water in the tank
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