Rotex RKHWMX300C, Installation And Maintenance Instructions Manual, Page: 56 / 72

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FA ROTEX HPSU monobloc compact • 09/2017
8 x Errors, malfunctions and messages
E9031 L5
Electrical defect
Electrical components
overvoltage fault
a) If the fault occurs <15x, the functional safety of the HPSU
monobloc compact is still guaranteed.
Î
Sporadic message during continuous self-monitoring by the
device.
Ɣ
No further measures are required.
b) If the fault occurs 15x, it is locked and may have the following
causes:
– Current mains overvoltage.
– Refrigerant compressor blocked or defective.
– Inverter circuit board in the heat pump outdoor unit defec-
tive.
– Wiring, poor contact.
– Service valves in the heat pump outdoor unit not open.
Ɣ Check, eliminate cause, replace.
Ɣ
If necessary, contact a ROTEX service technician.
E9032 L8
Electrical components
– Refrigerant compressor defective.
– Inverter circuit board in the heat pump outdoor unit defective.
Ɣ Check, replace.
Ɣ
If necessary, contact a ROTEX service technician.
E9033 L9
– Refrigerant compressor blocked or defective.
– Pressure difference between high and low pressure side too
high before starting refrigerant compressor.
– Service valves in the heat pump outdoor unit not open.
Ɣ Check, eliminate cause, replace.
Ɣ
If necessary, contact a ROTEX service technician.
E9034 LC
Communication error - internal communication in the heat pump out-
door unit disturbed.
– Electromagnetic influences.
Ɣ
Perform reset.
– Main circuit board in the heat pump outdoor unit defective.
– Inverter circuit board in the heat pump outdoor unit defective.
– Fan motor defective.
– Wiring, poor contact.
Ɣ
Check, eliminate cause, replace.
Ɣ If necessary, contact a ROTEX service technician.
E9035 P1
Circuit board
defective
Inverter circuit board in
the heat pump outdoor
unit
– No supply voltage from the mains connection.
– Inverter circuit board in the heat pump outdoor unit defective.
Ɣ
Check, eliminate cause, replace.
Ɣ If necessary, contact a ROTEX service technician.
E9036 P4 Electrical defect
Temperature sensor
R10T on inverter circuit
board in the heat pump
outdoor unit
Overtemperature in the heat pump outdoor unit
– Inverter circuit board in the heat pump outdoor unit defective.
– Temperature sensor on inverter circuit board defective, plug con-
nection X111A not correct.
Ɣ
Check, eliminate cause, replace.
Ɣ If necessary, contact a ROTEX service technician.
E9037 PJ Setting output
Output setting for heat
pump outdoor unit incor-
rect
Ɣ Contact a ROTEX service technician.
E9038 U0 Coolant leak
Sensors and parameter
settings in the heat
pump outdoor unit
Refrigerant loss.
– Refrigerant quantity too low. See fault code E9015 / E4.
– Blockage or leak in refrigerant line.
Ɣ
Check, eliminate cause, top up refrigerant.
E9039 U2 Under/over voltage
Mains voltage outside of the permissible range
– Sporadic fault shortly after a power failure.
Ɣ
No fault elimination necessary.
– Inverter circuit board in the heat pump outdoor unit defective.
Ɣ Check, replace.
Ɣ If necessary, contact a ROTEX service technician.
Code Malfunction /
error message
Component/
Designation
Causes and possible fault elimination
Display Internal