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- Faulty temperature sensor of return (input) water – the sensor is short-circuited
If the value of the second digit is not , the heat pump stops running.
rd digit
- No fault
- Faulty outdoor temperature sensor – the sensor is disconnected
- Faulty outdoor temperature sensor – the sensor is short-circuited
- Faulty building temperature sensor – the sensor is disconnected
- Faulty building temperature sensor – the sensor is short-circuited
- Faulty DHW temperature sensor – the sensor is disconnected
6 - Faulty DHW temperature sensor – the sensor is short-circuited
- Faulty storage tank temperature sensor – the sensor is disconnected
8 - Faulty storage tank temperature sensor – the sensor is short-circuited
If the value of the rd digit is not , some of the sensors are defective and the quality of temperature control may be
reduced. However, the operation of the heat pump is uninterrupted.
th digit
- No fault
- Faulty pool temperature sensor – the sensor is disconnected
- Faulty pool temperature sensor – the sensor is short-circuited
- Faulty secondary circuit temperature sensor – the sensor is disconnected
- Faulty secondary circuit temperature sensor – the sensor is short-circuited
If the value of the th digit is not , some of the sensors are defective and the quality of temperature control may be
reduced. However, the operation of the heat pump is uninterrupted.
. Faults and troubleshooting
If the heat pump signals any of the critical errors (any of the rst two digits is not ), it stops operating. The following
text describes typical causes of these errors and how to correct them. If the application of these procedures is not
successful, contact a service organization, which will take care of your problem.
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