70
COSMOGAS
Ecotower
The alarm history is displayed in the “Info” icon (section 8.2.15) of the display.
9 - DIAGNOSTICS
Code
Description
Status
Solution
E01
No communication between control
panel and control card or gas side
board
Compressor
stopped
Communication between control panel and control card or gas side card,
check the electrical wiring. Check that the microswitches on the control board
and the microswitches on the gas side board are in the position shown in the
wiring diagram. The system restarts as soon as communication is restored.
E02
No communication between control
panel and control card
Compressor
stopped
Check the electrical wiring.
E03
Error in the compressor electrical
supply phase (short circuit or open)
Compressor
stopped
Check the compressor electrical supply wiring, make sure there are no
short circuits.
E04
Current on the compressor phase
over the limit
Compressor
stopped
Check the compressor electrical supply wiring, make sure there are no
short circuits.
E05
Compressor driver error
Compressor
stopped
Supply voltage too high or low.
E06
Electrical supply voltage of the
compressor inverter board out of
limits.
Compressor
stopped
Check that the electrical supply between the “ACL” and “ACN” heads of the
compressor inverter board is between 197 and 253 VAC.
E07
Electrical supply error
Compressor
stopped
Check the electrical absorption of the outdoor unit and compare these values
with those shown on the control panel. If the difference is low, check that
the refrigerant quantity is sufficient. If the difference is great, replace the
compressor inverter board.
E08
Eeprom error
Compressor
stopped
Replace the gas side control board.
F01
Failure of the outdoor temperature
sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F02
Failure of the evapo-condensing battery
sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F03
Failure of the compressor discharge
temperature sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F04
Failure of the compressor suction
temperature sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F05
Failure of the low pressure sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F06
Failure of the high pressure sensor
Compressor
stopped
Check that the sensor is not shorted, open and that it is not giving wrong
values. If necessary, replace the sensor.
F07
Failure of the high pressure switch
Compressor
stopped
This message appears if the pressure switch is in the open position while
the unit is on standby or 2 minutes after the compressor is stopped. Check
that the pressure switch is not broken or badly connected.
F09
Fan speed control failure
Low speed
compressor
The speed of a fan or its return signal does not reach the desired value.
Check if the gas side control board or the fan motor are not broken.
F10
Fault in fan speed control
Compressor
stopped
The speed of a fan or its return signal does not reach the desired value.
Check if the gas side control board or the fan motor are not broken.
F11
Evaporating pressure too low
Compressor
stopped
If the pressure switch on the evaporator detects too low pressure 3 times
in a certain period of time, this message appears. The system restores by
removing and re-energizing the power supply. Check that the refrigerant
in the system is sufficient. Check that the fan or pump motors are running
smoothly. Check that the capacitor works properly. Check that the EEV
works regularly. Check that the water temperature is not too low and that
the difference between supply and return in cooling is quite low (within
approximately 8 ° C)
F12
Condensing pressure too high
Compressor
stopped
If the pressure switch on the evaporator detects too high pressure 3 times
in a certain period of time, this message appears. The system restores by
removing and re-energizing the power supply. Check that the water flow
in the system is sufficient. Check that the fan or pump motors are running
smoothly. Check that the external battery works properly. Check that the
EEV works regularly. Check that the water temperature is not too high and
that the difference between supply and return in cooling is quite low (within
approximately 6 ° C)
