MAXA CALIDO 110, User Manual

Page: 29 / 36

CALIDO
Sanitary water heat pump
29
11.7 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/
Malfunction
Error code LED indicator Possible reasons Corrective actions
Standby Dark
Normal running Bright
Lower tank water
temp. sensor failure
P01
☆
●
(1flash 1 dark)
1) The sensor open circuit
2) The sensor short circuit
1) Check the sensor connection
2) Replace the sensor
Upper tank water
temp. sensor failure
P02
☆☆
●
(2 flashes 1 dark)
1) The sensor open circuit
2) The sensor short circuit
1) Check the sensor connection
2) Replace the sensor
Evaporator coil
temp. sensor failure
P03
☆☆☆
●
(3 flashes 1 dark)
1) The sensor open circuit
2) The sensor short circuit
1) Check the sensor connection
2) Replace the sensor
Return gas temp
sensor failure
P04
☆☆☆☆
●
(4 flashes 1 dark)
1) The sensor open circuit
2) The sensor short circuit
1) Check the sensor connection
2) Replace the sensor
Ambient temp.
sensor failure
P05
☆☆☆☆☆
●
(5 flashes 1 dark)
1) The sensor open circuit
2) The sensor short circuit
1) Check the sensor connection
2) Replace the sensor
Antifreez protection
failure
P06
☆☆☆☆☆☆☆☆☆☆
●
(10 flashes 1 dark)
High pressure
protection (HP
Switch)
E01
☆☆☆☆☆☆
●
(6 flashes 1 dark)
1) Too high air inlet temp
2) Less water in the tank
3) The electronic expansion valve
assembly blocked
4) Too much refrigerant
5) The HP switch damaged
6) The uncompressed gas is in
refrigerant system
1) Check if the air inlet temp is over the
working limit
2) Check if the tank is full of water. If not,
charge water
3) Replace the electronic expansion valve
assembly
4) Discharge some refrigerant
5) Replace a new switch
6) Discharge and then recharge the refrigerant
Low pressure
protection (LP
Switch)
E02
☆☆☆☆☆☆☆
●
(7 flashes 1 dark)
1) Too low air inlet temp
2) The electronic expansion valve
assembly blocked
3) Too less refrigerant
4) The LP switch damaged
5) The fan assembly can not work
1) Check if the air inlet temp is over the
working limit
2) Replace the electronic expansion valve
assembly
3) Charge some refrigerant
4) Replace a new switch
5) Check if the fan working when the
compressor working. If not, some problems
with the fan assembly
High temperature
protection (Automatic
thermostat T80°C
Switch)
E03
☆☆☆☆☆☆☆☆
●
(8 flashes 1 dark)
1) Too high tank water temp
2) The T85°C switch damaged
1) If the tank water temp is over 80°C, the
switch will open and the e ‐ heater will stop for
protection. When water temperatures
becomes normal, the protection is auto ‐ reset
2) Replace a new switch
Compressor
protection
PA
☆☆☆☆☆☆☆☆☆
●
(9 flashes 1 dark)
The compressori s operating out
of the air and/or water
temperature limits
Wait for the air temperature to become
normal for operation.
Defrosting
☆☆☆☆☆☆☆☆
(Flashes in a continuous
fashion)
Wait the termination of the defrosting cycle
Communication
failure
E08 Bright