18
ALARM CODES
E23
E24
E40
E41
E45
E46
E27
E31
E32
E33
E42
Compressor thermal protection alarm
compressor 1 circuit 2:
- Compressor thermal protection open.
- Faulty power supply.
Fan thermal protection alarm.
Refrigerant piping temperature probe alarm (St6)
circuit 2.
It may indicate:
- Refrigerant piping temperature probe open or
without connecting.
Compressor 4 thermal protection alarm.
- Compressor thermal protection open.
- Faulty power supply.
Inlet water temperature probe alarm (St1).
It may indicate:
- Inlet water temperature probe open or without
connecting.
Water flow switch alarm.
It indicates low water flow in the unit.
St4 probe error.
Alarm of configuration error.
It may indicate that the terminal is broken.
High inlet water temperature. It indicates:
Inlet water temperature probe detects
temperatures higher than 90ºC during more than
one minute.
RE
DESCRIPTION
EFFECT
ACTION
VIS.
MAN
Compressor 1
circuit 2
stops
Press the ON/OFF button until the alarm
disappears; if alarm shows up again, check
continuity and change the faulty component.
• Check refrigerant charge.
• Check the refrigerant circuit is not blocked.
• Check connections and fuses.
• Check power supply.
Press the ON/OFF button until the alarm
disappears; if alarm shows up again, check
continuity and change the faulty component.
MAN
Circuit 2 fan
and circuit 2
compressors
stop
AUTO
Unit
stops
These protections are automatic reset; if alarm
shows up again, check:
• Connection of refrigerant piping temperature
probe (St6) (see electrical diagram), check
continuity and change the faulty
component.
AUTO
Circuit 2
compressors
stop
High pressure / high temperature alarm.
It is activated when refrigerant piping temperature
probe (St6) detects a temperature higher than
70ºC and the high pressure switch has not been
activated.
Press the ON/OFF button, until the alarm
disappears; if alarm shows up again, check:
• Working of high pressure switch.
• Coil clean and no blocked.
• Water flow on the cooling cycle.
• Check fuses of the fan.
• Outside temperatures very high.
• Check refrigerant charge.
AUTO
• Check low pressure switch working.
• Coil clean and no blocked.
• Check water flow on the cooling cycle.
• Check fuses of the fan.
• Outside temperatures very low.
• Check refrigerant charge.
Low pressure / low temperature alarm.
It is activated when refrigerant piping temperature
probe (St6) detects a temperature lower than
-30ºC and the low pressure switch has not been
activated.
Circuit 2
compressors
stop
Compressor 2
circuit 2
stops
MAN
AUTO
Check connection of inlet water temperature
probe (St1) (see electrical diagram), check
continuity and change the faulty component.
Unit
stops
AUTO
• Check water circuit is not blocked.
• Check water filter.
• Check water pump operation.
Unit
stops
(*)
AUTO
Check the St4 probe connection or cancel
Dynamic set point if the unit does not incorporate
St4 probe.
Unit
stops
AUTO
These protections are automatic reset; if the
alarm shows up again, check the continuity and
change the faulty component.
Unit
stops
AUTO
These protections are automatic reset; if the
alarm shows up again, check connection of
inlet water temperature probe (St1) (see
electrical diagram), check the continuity and
change the faulty component
Unit
stops
Press the ON/OFF button until the alarm
disappears; if alarm shows up again, check
continuity and change the faulty component.
• Check refrigerant charge.
• Check the refrigerant circuit is not
blocked.
• Check connections and fuses.
• Check power supply.
(*) Unit
stops
except water pump.
