BlueCool S-Series 27
12.3.1 Fault code table
Fault code
Possible cause Correction
Screen
LED
“Alive”
AAA - Undervoltage
1x flash-
ing,
pause...
Switch-off in case of undervoltage. Power
supply below set undervoltage value for
longer than 5 seconds. Cause is probably ex-
cessively long cable, overloading or an insuffi-
ciently high power generator output.
Check setting (default setting 195V (230V) or 97 V
(115V)). Do not set below 195 V (230V) or 90 V
(115V) to prevent damage to the compressor and
subsequently voiding of the warranty. Ensure a better
power supply. If necessary retrofit soft starts to lower
the start-up current and therefore reduce the voltage
drop.
A01 - low pressure
compressor
2x flash-
ing,
pause...
Compressor switches off due to low pressure.
Pressure switch defective or power circuit in-
terruption/short circuit.
Check electrical wiring. Replace pressure switch on
Schrader valve.
Cooling mode: Air supply insufficient.
Check air supply. Difference between air inlet/air out-
let temperature of evaporator at least 4 K.
Heating mode:
Sea water flow rate insufficient or sea water
too cold (Temperature below 6 °C).Sea water
strainer blocked or no intake.
Check the flow rate of the sea water circuit at the sea
water outlet. Difference between condenser inlet/
outlet temperature approx. 5 K. At sea water temper-
ature <6 °C: Heating not possible in reverse heating
operation. Clean sea water strainer and bleed sea
water circuit.
Refrigerant shortage. Check for refrigerant leak.
A02 - High pressure
compressor
3x flash-
ing,
pause...
Compressor switches off due to high pressure.
Pressure switch defective or power circuit in-
terruption/short circuit.
Check electrical wiring. Replace pressure switch on
Schrader valve.
In cooling mode: Sea water cooling insuffi-
cient. Sea water strainer soiled or no intake.
Check the flow rate of the sea water circuit at the sea
water outlet. The minimum flow rates must be com-
plied with. Clean sea water strainer and bleed sea
water circuit.
In heating mode: Air supply insufficient
Check air supply. Difference between air inlet/air out-
let temperature of evaporator at least 4 K.
A09 - Cabin tempera-
ture sensor
4x flash-
ing,
pause...
Cabin temperature sensor defective, break/
short-circuit in electrical circuit, cabin temper-
ature sensor not connected.
Connect or replace cabin temperature sensor.
A10 - Evaporator
temperature sensor
5x flash-
ing,
pause...
Temperature sensor of evaporator defective
or power circuit interruption/short circuit.
Check electrical wiring or replace sensor.
TA11 - Evaporator
temperature value
exceeded
n.a.
Evaporator temperature too low in cooling
mode or too high in heating mode
No corrective measures necessary. The compressor
switches off and switches on again as soon as the
cut-in temperature is reached.
Note
Fault code TA11 - Evaporator temperature value exceeded:
This code is a system information and not a fault which must be eliminated. The status indicator will go out automatically
on reaching the cut-in temperature.
INIT
6x flash-
ing,
pause...
Initialisation procedure or system blocked.
Electrical wiring defective,
interruption in power circuit/short circuit.
Check cables and connections of pc-board and of
control element. Replace defective cable, control ele-
ment or pc-board.
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