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Procedure for changing the parameters values that are allowed to the user/installer:
- Press the clock and down arrow buttons (
- "00" will flash on the right side of the display.
- Press the button
- Press again the button
confirm.
- The first parameter with the relative value will flash. At this point, only the parameters defined as "Editable" in the
reported table of parameters will be displayed and can be selected.
- Use the up and down arrow buttons to go to the parameter you want to modify and press the button
enter the mode of changing the value. Only its proper value will start to flash. Change the value with the up and
down arrow buttons and press the button
- Quit the edit mode by pressing the ON/OFF button
The password used view the editable parameters is 24.
4.7 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/
Error
Malfunction
code
Standby
Normal running
Lower tank water
P01
temp. sensor failure
Upper tank water
P02
temp. sensor failure
Evaporator coil
P03
temp. sensor failure
Return gas temp
P04
sensor failure
Ambient temp.
P05
sensor failure
Antifreez protection
P06
failure
High pressure
protection (HP
E01
Switch)
Low pressure
protection (LP
E02
Switch)
High temperature
protection
(Automatic
E03
thermostat T80°C
Switch)
Compressor
PA
protection
Defrosting
Communication
E08
failure
, the only the first zero "00" will start flashing; use the up/down buttons to select the first value.
, the other zero "00" will start flashing and select the next value, use the button
LED indicator
Dark
Bright
●
o
(1flash 1 dark)
●
o o
(2 flashes 1 dark)
●
o o o
(3 flashes 1 dark)
●
o o o o
(4 flashes 1 dark)
●
o o o o o
(5 flashes 1 dark)
o o o o o o o o o o ●
(10 flashes 1 dark)
o o o o o o ●
(6 flashes 1 dark)
o o o o o o o ●
(7 flashes 1 dark)
o o o o o o o o ●
(8 flashes 1 dark)
o o o o o o o o o ●
(9 flashes 1 dark)
o o o o o o o o
(Flashes in a
continuous fashion)
Bright
+
) simultaneously for 3 seconds.
to confirm the new value.
.
Possible reasons
1) The sensor open circuit
2) The sensor short circuit
1) The sensor open circuit
2) The sensor short circuit
1) The sensor open circuit
2) The sensor short circuit
1) The sensor open circuit
2) The sensor short circuit
1) The sensor open circuit
2) The sensor short circuit
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) 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) Too high tank water temp
2) The T85°C switch damaged
The compressor s operating out of
the air and/or water temperature
limits
Corrective actions
1) Check the sensor connection
2) Replace the sensor
1) Check the sensor connection
2) Replace the sensor
1) Check the sensor connection
2) Replace the sensor
1) Check the sensor connection
2) Replace the sensor
1) Check the sensor connection
2) Replace the sensor
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
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
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
Wait for the air temperature to become normal
for operation.
Wait the termination of the defrosting cycle
to
again to
37
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