Alpha-InnoTec L12 SPLIT - Hot Water Alarm; Supply Alarm

May be due toDescriptionAlarm text on the dis-
play
Alarm
no.
- Defective fan motorContinuous deviation on power transistor for
15 minutes.
Inverter errorE51
- Defective circuit board for inverter in L8
SPLIT/L12 SPLIT
- Open-circuit or short-circuit on sensor inputSensor fault, suction gas in L8 SPLIT/L12 SPLIT
(Tho-S).
Sensor fault Tho-SE53
- Sensor does not work (see "Temperature
sensor" section)
- Defective control board in L8 SPLIT/L12 SPLIT
- Open-circuit or short-circuit on sensor inputSensor fault, low pressure transmitter in L8
SPLIT/L12 SPLIT.
Sensor fault LPTE54
- Sensor does not work (see "Temperature
sensor" section)
- Defective control board in L8 SPLIT/L12 SPLIT
- Fault in the refrigerant circuit
- Service valve closedInsufficient refrigerant is detected upon start-
up in cooling mode.
Insufficient refrigerantE57
- Loose connection sensor (BT15, BT3)
- Defective sensor (BT15, BT3)
- Too little refrigerant
- Defective circuit board for inverter in L8
SPLIT/L12 SPLIT
Failed start for compressorInverter errorE59
- Defective control board in L8 SPLIT/L12 SPLIT
- Compressor fault
Hot water alarm
The following alarms block hot water production via L8 SPLIT/L12 SPLIT. The addition is blocked completely.
May be due toDescriptionAlarm text on the dis-
play
Alarm
no.
- Contactor to internal electricity defectiveToo high a temperature (>90 °C) on hot water
sensor (BT6).
High HW temp.8
- Incorrect external addition setting
- Contactor to internal electricity defectiveToo high a temperature (>90 °C) on immersion
heater sensor (BT19).
High AH temp.9
- Incorrect external addition setting
- Open-circuit or short-circuit on sensor inputSensor fault, hot water (BT6).S. fault HW34
- Sensor does not work (see "Temperature
sensor" section)
- Open-circuit or short-circuit on sensor inputSensor fault, immersion heater (BT19).S. fault AH35
- Sensor does not work (see "Temperature
sensor" section)
Supply alarm
The following alarms switch off heating/cooling. Only hot water production is permitted.
May be due toDescriptionAlarm text on the dis-
play
Alarm
no.
- Sensor does not work (see "Temperature
sensor" section)
Too high a temperature (>90 °C) on supply line
sensor, system 1 (BT2).
High VBF110
- Sensor does not work (see "Temperature
sensor" section)
Too high a temperature (>90 °C) on supply line
sensor, system 2.
High VBF211
- Open-circuit or short-circuit on sensor inputSensor fault, supply, system 1 (BT2).Sensor fault VBF136
- Sensor does not work (see "Temperature
sensor" section)
SPLIT68
Miscellaneous
Alarm list