42
Protection/
Malfunction
Error code
LED
indicator
Possible reasons
Corrective actions
Lower tank
water temp.
sensor failure
P1
1flash
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
Upper tank
water temp.
sensor failure
P2
2 flashes
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
Evaporator coil
temp. sensor
failure
P3
3 flashes
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
Return gas
temp sensor
failure
P4
4 flashes
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
Ambient temp.
sensor failure
P5
5 flashes
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
Solar temp.
sensor failure
P6
10 flashes
1) Sensor open circuit
2) Sensor short circuit
3) PCB board failure
1) Check sensor connection
2) Replace sensor
3) Change PCB board
T6 too high
temp.
protection
P8
No
flashes
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 sensor
Emergency
switch off
EC
Shows the
code
1) Connecting wire off
2) PCB board failure
1) According to the physical
truth judging whether is
normal or not
2) Change PCB board
High pressure
protection (HP
Switch)
E1
6
Flashes
1) Too high air inlet temp
2) Less water in the tank
3) Electronic expansion
valve assembly blocked
4) Too much refrigerant
5) Switch damaged
6) Uncompressed
gas is in refrigerant
system
7) PCB board failure
1) Check if air inlet temp is
over working limited
2) Check if tank is full of
water. If not, charge water.
3) Replace electronic
expansion valve assembly
4) Discharge some refrigerant
5) Replace a new switch
6) Discharge and then
recharge the refrigerant
7) Change PCB board
Summary of Contents for Dalis Pro 200DHW5
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