Crystal Mini 40, Installation And User Manual

Page: 24 / 27

7. Repairs
23
Code Fault Possible causes Action
E03
Flow sensor malfunction
Insufficient water in heat exchanger
Check your water circuit operation and the
opening of the By-Pass valves
Sensor disconnected or defective Reconnect or replace sensor
E04
Antifreeze protection
Protection activated when the ambient
temperature is too low and the unit is on
standby
No intervention is necessary
E06
Low pressure protection
Insufficient refrigerant gas Readjust the refrigerant volume
Defective 4-way valve Replace valve
Low pressure switch disconnected or defective Reconnect or replace low pressure switch
E09 Ambient temperature exceeds
operating range
Ambient temperature sensor failure Replace sensor
Ambient temperature is too high or too low Suggest to shut down the unit
Defective PCB Replace PCB
E10
Connection problem between
PCB and inverter module
Bad connection
Check wiring connections between PCB and
inverter module
Defective inverter module Replace inverter module
Defective PCB Replace PCB
E12
Vented air temperature too high Insufficient refrigerant gas Readjust the refrigerant volume
E13
Vented air temperature too low
Ambient temperature too low Check the ambient temperature
Sensor disconnected or defective Reconnect or replace sensor
E15
Water intake temperature
sensor malfunction
Sensor disconnected or defective Reconnect or replace sensor
E16
Outside coil temperature error Sensor disconnected or defective Reconnect or replace sensor
E18
Vented temperature error Sensor disconnected or defective Reconnect or replace sensor
E20
Inverter module protection See chapter Appendices
E21
Ambient temperature error Sensor disconnected or defective Reconnect or replace sensor
E23
Water temperature at outlet too
low for cooling mode
Insufficient water flow
Check water pump operation and openings of
By-Pass inlet/outlet valves
E27
Water outlet error Sensor disconnected or defective Reconnect or replace sensor
E32
Outlet temperature too high for
heating mode protection
Insufficient water flow
Check water pump operation and openings of
By-Pass inlet/outlet valves
E33
Coil temp too high (higher than
60
° C) for cooling mode
protection Too great a
difference between the inlet
water temperature and the
outlet water temperature
Refrigerant overcharged Readjust the refrigerant volume
Fan motor doesn
’
t work or air outlet blocked
Check the fan is working properly and the air
inlet is unobstructed
Insufficient water flow
Check the good circulation of water in the heat
pump, and the opening of the inlet / outlet
valves of the By Pass
Sensor disconnected or defective Reconnect or replace sensor
E46
DC fan motor malfunction
Bad wire connection Reconnect the fan
Fan motor is defective Replace the fan motor
7.2
List of faults