Section 9 - Fault Finding
100 Installation and Maintenance
FAULT FINDING
9.1.14 No connection Outdoor PCB to Inverter PCB (H1)
ᘐ WARNING: Set the power supply to OFF. Wait for a minimum of 10 minutes before you work on the appliance. This
is to let harmful electrical charges decrease to below a safe limit.
Is the mains electricity supply cable correctly connected
to the Inverter PCB?
Is the low-voltage cable from the Outdoor PCB
connected correctly to the Inverter PCB?
Refer to Figure 67 on page 116.
Disconnect the wiring assembly from the Compressor,
then connect the same wiring assembly to the Inverter
Tester. Is the Inverter defective?
Replace the Outdoor PCB.
Make sure that the mains electricity supply
cable is fully connected to the Inverter
PCB.
Make sure that the low-voltage cable from
the Outdoor PCB is correctly connected to
the Inverter PCB.
Replace the Inverter.
YES
YES
NO
NO
NO
YES
Is the Outdoor Unit, Plate Heat Exchanger Outlet
Refrigerant Thermistor connected to the Outdoor PCB?
Refer to Figure 67 on page 116.
Is Outdoor Unit, Plate Heat Exchanger Outlet
Refrigerant Thermistor, attached connected to
Outdoor PCB?
Refer to Figure 67 on page 116.
Disconnect the Outdoor Unit, Plate Heat Exchanger,
Outlet Refrigerant thermistor. Is the resistance between
Disconnect the Outdoor Unit, Plate Heat Exchanger
Outlet Refrigerant thermistor. Test for resistance. Is the
Replace the Outdoor PCB.
Replace Outdoor PCB.
Correctly connect the wiring assembly
from the Thermistor to the Outdoor PCB.
Connect the Outdoor Unit, Plate Heat
Exchanger Outlet Refrigerant Thermistor,
to the Outdoor PCB.
Replace thermistor. the Outdoor Unit,
Plate Heat Exchanger Outlet Refrigerant
Thermistor (T2).
Replace the thermistor.
NO
NO
NO
NO
YES
YES
YES
YES
9.1.15 Outdoor Unit, Plate Heat Exchanger Outlet Refrigerant Thermistor (T2) Error
9.1.16 Plate Heat Exchanger Inlet Refrigerant Thermistor Error
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