Norsup 7021075 Mode D'emploi page 31

board
Compressor phase
EE 25
failure
Four-way valve
EE 26
reversal failure
EEPROM data read
EE27
malfunction
The inter-chip
communication
EE28
failure on the main
control board
Inlet water
PP 01 temperature sensor
failure
Outlet water
PP 02 temperature sensor
failure
Heating piping
PP 03
sensor failure
Gas return sensor
PP 04
failure
Ambient
PP 05 temperature sensor
failure
Exhaust piping
PP 06
sensor failure
Antifreeze
PP 07 protection in
Winter
Low ambient
PP 08 temperature
protection
Piping temperature
PP 10 too high protection
under cooling mode
Compressors U, V, W
connected to one phase or two
phases
1. Four-way valve
failure
2. Lack of refrigerant (no detect
when T3 or T5 malfunction)
1. Wrong EEPROM data in the
program or failed input of
EEPROM data
2. Main board failure
Main board failure
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
1. The sensor failure or short
circuit
2. The wiring of sensor is loose
Ambient temperature or water
inlet temperature is too low
1. Beyond the scope of using
environment
2. Sensor abnormality
1. Ambient temperature is too
high or the water temperature is
too high in cooling mode
2. Refrigeration system
abnormal
28
are
Check the actual wiring according to the
circuit diagram
1. Switch to Cooling mode to check the
reversal
4-way valve if it has been reversed
correctly
2. Change a new 4-way valve
3. Fill with gas
1. Re-enter correct EEPROM data
2. Change a new main board
1. Turn off electricity supply and restart it
2. Change a new main board
1. Re-fix the wiring of the sensors
2. Change the sensor
1. Re-fix the wiring of the sensors
2. Change the sensor
1. Re-fix the wiring of the sensors
2. Change the sensor
1. Re-fix the wiring of the sensors
2. Change the sensor
1. Re-fix the wiring of the sensors
2. Change the sensor
1. Re-fix the wiring of the sensors
2. Change the sensor
Normal protection
1. Stop using, beyond the scope of using
2. Change the sensor
1. Check the scope of using
2. Check refrigeration system
is