Airwell air conditioner troubleshooting

The Airwell company is one of the leading worldwide suppliers of air conditioning systems with presence in more than 80 countries of the world. Its range includes all types of industrial, semi-industrial and household equipment. Almost all the equipment possesses an option of self-diagnostics with display of the malfunction code. The Airwell air conditioner troubleshooting system will help to decipher these codes.

General System Failures and Corrective Actions
Never open the Outdoor unit before turning off the Power.

Airwell air conditioner troubleshooting

SYMPTOMPROBABLE CAUSECORRECTIVE ACTION
Indoor unit power supply indicator (Red LED) does not light upNo power supplyCheck power supply. If OK, check
display and display wiring. if OK,
replace controller
Indoor unit does not respond to remote
control message
Remote control message not
reached the indoor unit
Check remote control batteries, if
OK, check display and display
wiring, if OK, replace display PCB.
If still not OK replace controller
Indoor unit responds to remote control
message but Operate indicator (Green
LED) does not light up
Problem with display PCBReplace display PCB.
If still not OK replace controller
Indoor fan does not start (louvers are opened and Green LED is ON)Unit in heat mode and coil is
still not warm
Change to cool mode
Outdoor unit is in opposite
mode
Change operation mode
Problem with controller or
capacitor
Change to high speed and Check
power supply to motor is higher
than 130VAC (for triack controlled
motor) or higher than 220VAC for
fixed speed motors, if OK replace
capacitor, if not OK replace
controller
Indoor fan works when unit is OFF, and
indoor fan speed is not changed by
remote control command.
Controller problemReplace controller
Water leakage from indoor unitIndoor unit drainage tube is
blocked
Check and open drainage tube
One indoor unit or more are operating in
cool mode with no capacity, and the other
units have water leaks/freezing problems
The communication wires of
the indoor units are switched
Check and correct the
communication wires connection
One indoor or more are operating in heat
mode with a limited capacity, and the coil
on the other units are very hot
The communication wires of
the indoor units are switched
Check and correct the
communication wires connection
Outdoor unit display board and leds are offNo power supplyCheck the connections and the
wiring on the main terminal -
Repair if needed.
PFC Chock coilCheck the PFC Chock coil
Burnt fuseCheck 20A fuse on the Filter
Compressor operates but one or more
units generates no capacity
EEV problemCheck 20A fuse on the Filter
Refrigerant leakageCheck refrigeration system
Indoor coil blockClean filters and/or remove block
Outdoor coil blockRemove block and/or avoid air by-pass
Compressor is over heated and unit does
not generate capacity
EEV problemCheck EEV
Refrigerant leakageCheck refrigeration system
Indoor coil blockClean filters and/or remove block
Outdoor coil blockRemove block and/or avoid air by-pass
Compressor stops during operationElectronic controlCheck diagnostics
Refrigerant leakageCheck refrigeration system
Not all units are operatingCommunication problemsCheck diagnostics
Compressor does not startElectronics control problem
or protection
Check diagnostics
Unit works in wrong mode (cool instead of heat or heat instead of cool)Electronics or RV problemCheck RV
All components are operating properly
but no cooling or no heating
Refrigerant leakCheck refrigeration system
Compressor motor is generating noise
and no suction occurs
Phase order to compressor
is wrong
Check compressor phase order
Freezing of outdoor unit in heat mode and outdoor unit base is blocked with iceConnect base heater
The unit stop suddenly during operationEMC interference to the A/C
unit
Check for EMC problems
Indoor unit(s) Indicator(s) leds may flickerEMC interference to the A/C
unit
Check for EMC problems
Other home appliances operation is faulty
such as noise appears in the television
picture, or the picture is distorted or static
occurs in the radio sound
EMC interference by the A/C
unit
Check for EMC problems
All othersSpecific problems of indoor
or outdoor units
Check diagnostics