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6. Fault Messages
While on, the control panel will automatically display the faults that may occur
according to the acronyms presented in the "Fault" column of the table below,
except for the Ope and SHr faults.
OPERATION
DESCRIPTION
SYMPTOM
FAULTS
E2
Compressor motor was
Compressor motor
running and stopped
overload
turning off the
appliance.
E3
Compressor motor
Blocked rotor
tries to start but fails.
E4
Device turns off.
Battery voltage
Permissible voltage
below 19.5V
range 19.5V – 32V
LU
Device turns off. To
Programmed
connect again, you
cut-off voltage
need to erase the
has been
fault. Turn it off and
reached.
on to work again.
"ti" sensor, the fault
is indicated directly
on the display.
Sensor "to", there
Temperature
is no automatic
OP
sensor/Sensors
indication.
open.
Press the key
Temperature (-)
for 5 seconds to
display OP.
CAUSE
Motor current higher than 50 A. Discharge pressure too
high. Condenser fan problem.
Internal breakage of the compressor or problem in the
main electrical connectors.
The battery needs to be recharged or defective battery.
Programmed voltage value. Switches off the appliance to
preserve the battery.
Value programmed at the factory 21.5 V(24V) and
9,5 V (12V).
Sensor disconnected.
Sensor electrical circuit open.
"ti" sensor - The appliance continues to work, and
the compressor speed goes to the highest speed in
the chosen mode.
Sensor "to" - The appliance continues to work, but
the evaporator coil may freeze without the df fault
being displayed.
OPERATION
DESCRIPTION
SYMPTOM
FAULTS
ti" sensor, the fault
is indicated directly
on the display.
Sensor "to", there
Temperature
is no automatic
SH
sensor/sensors
indication.
shorted.
Press the key
Temperature (-)
for 5 seconds to
display SH.
The AC doesn't
cool down enough.
Possible lack of
Temperature
rF
refrigerant.
difference of less
than 5°C for at least 3
minutes.
Evaporator
temperature less than
Evaporator coil
dF
or equal to 2°C
freezing.
Compressor turns on
and off.
Evaporator fan
EF
Fan not working.
failure.
CAUSE
Short-circuited sensor.
Sensor electrical circuit short-circuited.
"ti" sensor - The appliance continues to work, but
the compressor speed goes to the highest speed in
the chosen mode.
Sensor "to" - The appliance continues to work, but
the evaporator coil may freeze without the df fault
being displayed.
There may be a partial or total lack of refrigerant.
The condenser fan must be running*. See page 28.
If the evaporator temperature drops to 2°C or less,
the compressor will be switched off and dF will be
shown on the display. The compressor will stop
running until the temperature rises to 6°C. See
important operating details. See page 28.
Fan stuck or short-circuited.
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