Idea ISW-10 SF1-DN1, Installation Manual, Page: 48 / 66

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Er 12
Overheating
protection of
exhaust temp
1. Insufficient refrigerant.
2. The system is blocked
1. Leak detection and repair of the system and
charge refrigerant according to the parameters.
2. Check the system and troubleshoot.
Er 14
Water tank
sensor fault
1, The set temperature is too high.
2. The interface between the sensor and the
main board is loose or falls off;
3. The sensor probe falls off;
4. The sensor connection wire is open or
short-circuited;
5. The sensor is damaged;
1. Lower the set temperature
2. Check and reinforce the interface between
the sensor and the main board;
3. Re-fix the sensor probe;
4. Repair the sensor connection line;
5. Replace the sensor;
Er 15
Inlet water temp
sensor fault
1. The interface between the sensor and the
main board is loose or falls off;
2. The sensor probe falls off;
3. The sensor connection wire is open or
short-circuited;
4. The sensor is damaged;
1. Check and reinforce the interface between
the sensor and the main board;
2. Re-fix the sensor probe;
3. Repair the sensor connection line;
4. Replace the sensor;
Er 16
External coil
sensor fault
1. The interface between the sensor and the
main board is loose or falls off;
2. The sensor probe falls off;
3. The sensor connection wire is open or
short-circuited;
4. The sensor is damaged;
1. Check and reinforce the interface between
the sensor and the main board;
2. Re-fix the sensor probe;
3. Repair the sensor connection line;
4. Replace the sensor;
Er 18
Exhaust temp
sensor fault
1. The interface between the sensor and the
main board is loose or falls off;
2. The sensor probe falls off;
3. The sensor connection wire is open or
short-circuited;
4. The sensor is damaged;
1. Check and reinforce the interface between
the sensor and the main board;
2. Re-fix the sensor probe;
3. Repair the sensor connection line;
4. Replace the sensor;
Er 20
Inverter
modules
abnormal
protection
1. The fan is not working properly;
2. Dirty fins cause poor heat dissipation;
3. The drive module is damaged; 1. Check whether the fan is working normally;
2. Clean the outer fins;
3. Replace the drive module;