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8 Troubleshooting
Check
Screws and nuts
Insulation
Filters of indoor unit(s)
Outdoor unit heat exchanger
Casing indoor and outdoor unit(s)
Casing of the outdoor unit
Condensate pan
Fan
Vegetation
Leaves and snow
8
Troubleshooting
8.1
Error codes
Tab.107
Error code
Description
E1
Fault with the room temperature sensor
E2
Fault with the refrigerant temperature sensor on the outdoor unit
E3
Fault with the refrigerant temperature sensor on the indoor unit
E4
Fault with the fan motor on the indoor unit (PG motor)
E5 (5E)
Communication error between the outdoor unit and the indoor unit
F0
Fault with the fan motor on the outdoor unit (DC motor)
F1
Fault with the inverter module protection (IPM)
F2
Fault with the outdoor unit board protection (PFC) condenser
F3
Fault with the compressor synchronism
F4
Fault with the discharge temperature sensor
F5
Fault with the overheating protection on the compressor
F6
Fault with the outdoor temperature sensor
F7
Fault with the over-voltage or low voltage protection
F8
Communication fault between the outdoor unit and the outdoor unit control board unit
F9
Fault with the outdoor unit EPROM
FA
Suction sensor error
Fb
Floor standing motor error.
P2
High-pressure switch protection
P3
Lack of refrigerant protection
P4
Condenser overload protection (cooling mode)
P5
Discharge temperature protection
P6
Evaporator overload protection (heating mode)
P7
Indoor unit freeze protection (cooling mode)
P8
Outdoor unit overcurrent protection
134
Operations to be carried out
Check all screws and nuts (cover, support, etc.).
Replace any damaged sections of insulation.
Clean the filters regularly.
Clean the outdoor unit heat exchanger gently with a soft brush or with a soft jet of
water (no high pressure sprayer or pressures this can damage the heat exchanger).
Clean the outside of the appliance using a damp cloth and a mild detergent.
Check periodically signs of rust or scratches. Repair the defective position or apply
the rust resisting paint if necessary.
Check the water level in the box. In case of stagnation, clear the siphon or check
the lift pump is operational.
Visual check for swing and balance. Check adhesion of dust and external appear
ance.
Remove excessive vegetation around the outdoor unit.
Remove leaves and snow in the neighbourhood of the outdoor unit.
In case of appliance failure, the indoor unit and wired controller will display
an error code.
Additional information regarding the errors is given via the LEDs on the
outdoor unit PCB :
7798815 - v04 - 07122022
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