16
ENGLISH
Displayed error message and related
equipment failure Component Possible cause Putting it right, other possible
causes and solutions
PP 1 Compressor and blower
have stopped Water temperature
sensor Sensor signal wire or supply wire is
broken, or the sensor is defective.
Check the wires and connections,
replace defective ones. If the failure
persists, replace the sensor.
PP 2 Compressor and blower
have stopped. Temperature sensor at
compressor discharge Sensor signal wire or supply wire is
broken, or the sensor is defective
Check the wires and connections,
replace defective ones. If the failure
persists, replace the sensor.
PP 3 Heat pump runs without
interruption. Defrosting system Defrosting had been insufficient and the
control system stopped the heat pump.
Increase slightly water flow rate through
the heat pump to increase temperature
in the evaporator.
PP 5 Compressor and blower
have stopped. Ambient air tempera-
ture sensor Sensor signal wire or supply wire is
broken, or the sensor is defective
Check the wires and connections,
replace defective ones. If the failure
persists, replace the sensor.
PP 7 First stage of frost
rotection Either ambient temperature, or inlet
water temperature is too low. Filtration pump will start operation.
PP 7 Second stage of frost
protection Either ambient temperature, or inlet
water temperature is too low. In addition to filtration pump also the
heat pump will start operation.
EE 1 Compressor and blower
have stopped. Maximum./ Minimum
pressure switch
Low water flow rate.
Clean the filtration unit and open
fully the bypass.
Protection is disconnected or defective 1)
Surplus coolant in the system 1)
EE 2 Compressor and blower
have stopped. Minimum pressure
switch
Lackof coolantinthe system.
1)
Coolant leakage fromthe system.
1)
EE 3 Compressor and blower
have stopped. Flow rate sensor
Water flow rate is low.
Flow rate sensor signal wire or supply
wire is broken, or the flow rate sensor
is defective.
Clean the filtration unit and open fully
the bypass.
Check connections and wires, replace
them or replace the control unit.
EE 4 Equipment cannot be
switched ON. Safety witch Action of the safety switch. Have checked the electrical wiring.
EE 5 Compressor and blower
have stopped. Ambient air
temperature sensor Ambient temperature is lower than set.
EE 6 Compressor and blower
have stopped Temperature sensor at
compressor discharge
Thetemperatureinexcessof105°Conthe
compressordischargewasdetectedmorethan
threetimeswithintheperiodof24hours.
The problem that may be caused by
external conditions. Coolant leakage.
Clogged capillary tube.
EE 7 Equipment cannot be
switched on Phase protection Incorrect phase connection. Have it checked.
EE 8 Control panel does not
communicate Communication error A problem of equipment communication
with the control unit. Check the connections of signal cable.
Note:
1) A specialized technician of refrigeration equipment shall be contacted to check the system.
IMPORTANT: In case of a necessary intervention into electrical wiring an authorised service shall be contacted.
7.3 ERROR MESSAGES AND TROUBLESHOOTING