Idea ISW-10 SF1-DN1, Installation Manual

Page: 50 / 66

- 50 -
Er 33
Overheating for
coil temp
1. The sensor is faulty.
2. Dirty coils and insufficient heat exchange.
3. Insufficient water flow or blockage of
heat exchanger 1. Check the sensor and replace or repair it.
2. Cleaning the coil
3. Increase the water flow and check the heat
exchanger.
Er 34
Overheating for
inverter
modules 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;
Er 42
Cooling coil
temp sensor
fault
1. The sensor is faulty.
2. Dirty coils and insufficient heat exchange.
3. Insufficient water flow or blockage of
heat exchanger 1. Check the sensor and replace or repair it.
2. Cleaning the coil
3. Increase the water flow and check the heat
exchanger.
Er 62
Economizer inlet
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 63
Economizer
outlet 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 64 DC motor 1 fault
1. The DC fan wire is damaged;
2. The DC fan is jammed and blocked;
3. The main board is damaged;
1. Check whether the DC fan wiring is correct
and whether it is broken;
2. Check whether the DC fan blades are stuck
and whether it can rotate normally, otherwise
change the fan;
3. Change the main board;