Econ NE-F50SP/R4INV-PA, User Manual

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Er 05 High pressure Protection
Measure the pressure value when heat pump is
heating(cooling), if it’s higher than 44.0 bar, it
means heat pump has got really higher pressure
protection:
1. Detect EEV step, low pressure and suction
temp;
2. Detect the inlet/outlet water temp,;
3. Maybe there is some air in the refrigeration
system;
4.Clean the water exchanger or water filter
Er 09
Communication failure between Display
and PCB
1. Check if the communication connection wire
between display and PCB is well . Change or
mend the wire if necessary .
2. Check the PCB or display. If damaged,
Change the corresponding part .
Er 10
Communication failure of frequency
conversion module(alarm when
communication between display and
PCB is good)
Change PCB.
Er 12 High exhaust temp protection
1. Replace the compressor exhaust
temperature sensor.
2. Reconnect or clean compressor exhaust
temperature sensor and wrap it with insulation
tape.
3.Replace the controller or PC Board.
Er 15 Water inlet temperature failure
Check the connection, change the sensor if
necessary
Er 16 External coil temperature failure
Check the connection, change the sensor if
necessary