Alpha-InnoTec Luxtronik Operating Manual page 37

No. Display
760 Defrosting fault
761 LIN timeout
762 sensor evaporator intake
763 sensor compressor intake
764 Sensor compressor heater
765 Overheating
766 compressor's functional
range
767 STB E-Rod
768 Flow monitoring
769 Pump control
770 Low superheat
771 High superheat
776 limit of application-CP
777 Expansion valve
778 Low pressure sensor
779 High pressure sensor
780 EVI sensor
781 Liquid temp. sensor before
EXV
782 Suction gas EVI temp.
sensor
783 Communication SEC
board – Inverter
784 VSS lockdown
785 SEC-Board defective
786 Communication SEC
board – Inverter
787 VD alert
788 Major VSS fault
789 LIN/Encoding not found
790 Major VSS fault
We reserve the right to make technical changes | 83055400fUK – Translation of the original instruction manual (2.1) | ait-deutschland GmbH
Description
Defrosting ended 5 times in succession by maximum time
(strong wind impinges on evaporator) .
LIN timeout.
Tü sensor error (evaporator intake).
Tü1 sensor error (compressor intake).
Sensor error compressor heater.
Overheating longer than 5 minutes below 2K.
Operation for 5 minutes outside the compressor's functional
range.
STB of the heating element has been activated.
Insufficient flow in defrost cycle.
After 10 sec compressor runtime excessively low flow.
Overheating lies below the limit value for a lengthy period.
Overheating lies below the limit value for a lengthy period.
Compressor operates outside its use limits for a lengthy
period.
Expansion valve is defective.
Low-pressure sensor is defective.
High-pressure sensor is defective.
EVI sensor is defective.
Liquid temperature sensor upstream of the ex-valve is
defective.
Suction gas EVI temperature sensor is defective.
Communication between the SEC board and the inverter is
disrupted.
Inverter is blocked.
Error found in the SEC board.
Fault found in communication between the SEC and
HeatingIO of the SEC board.
Compressor signals faults.
Fault in the inverter.
Control unit unable to find coding. Either the LIN
connection is interrupted or the coding resistor is not
detected.
Fault in the power supply of the inverter / compressor.
Remedy
Protect the fan and evaporator from strong
wind.
Check cable/contact.
Check sensor, replace if necessary.
Check sensor, replace if necessary.
Check sensor, replace if necessary.
When switching on for the first time, check
rotary field, otherwise phone customer
service.
Check rotary field.
Check the heating element and press the
fuse back in.
Check hydraulics, check pump, check flow.
Check PWM cable, check pump.
Check the temperature sensor, pressure
sensor and expansion valve.
Check the temperature sensor, pressure
sensor, fill quantity and expansion valve.
Check the thermodynamics.
Check the expansion valve, connection
cable and if applicable the SEC board.
Check the sensor, connector and
connection cable.
Check the sensor, connector and
connection cable.
Check the sensor, connector and
connection cable.
Check the sensor, connector and
connection cable.
Check the sensor, connector and
connection cable.
Check the connection cable, interference
suppression capacitors and wiring.
Disconnect the complete system from the
power supply for 2 minutes.
If it occurs again, check the inverter and
compressor.
Replace the SEC board.
Check the Heating/IO SEC board cable
connection.
Acknowledge fault.
If an error occurs repeatedly, phone the
authorised service personnel (customer
service).
Check the inverter.
Check the connection cable LIN / coding
resistor.
Check the wiring, inverter and
compressor.
37