ProTeam PP10C - Page 20

5. .2 System Protection Board Malfunction Table
(Only 3 phase units)
20
Disp. Problem Reason Action ResolutionReco
code verydescription
1 Icing/freezing on Refrigerant temperature Unit stops, Y Reduce the amount of
evaporator at the from the tube outlet is alarm the refrigerant
refrigerant inlet too low
2 Refrigerant Refrigerant temp. Before Unit stops, Y Increase the amount of
leakage tube inlet is too low. alarm the refrigerant
3 Low pressure Low pressure switch Unit stops, Y Check the pressure
action alarm switch and turn
the heat pump on
4 Compressor Compressor exhaust Unit stops, Y Check the refrigerant
temp. too high temperature is too high. alarm system
5 Over-current Current through the Unit stops, Y Check voltage on the
on compressor compressor is too high alarm power supply, check
short circuit at compr.
6 High pressure High pressure switch Unit stops, Y Check the pressure
action alarm switch (replace switch)
and turn the
heat pump on
7 Failure of the Temperature sensor Unit stops, Y Check the sensor
temperature sensor opened or short alarm (replace sensor)
circuit
8 Temperature sensor
sensor open or short circuit
9 Failure of the sensor Temperature sensor
at open or short circuit
E Power supply Wrong connection connection
wrong or no connection follow the
Connection Table)
output
the output
before tube*
Failure of the outlet Unit stops, Y Check the sensor
temperature alarm (replace sensor)
Unit stops, Y Check the sensor
alarm (replace sensor)
of the compressor
Unit stops, Y Check the
alarm (
* Water tube for outlet of the heat exchanger.