Troubleshooting
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SYSTEM
INDOOR
UNIT
OUTDOOR UNIT
Fault diagnosis by remote controller
The remote controller can receive relevant error codes from the indoor unit.
1. When (cANCEL) is held down for about 5 seconds,"
00
"blinks in
the temperature display section.
2. Press (cANcE0 repeatedly until a long beep is produced.
• The code indication changes as shown below, and notifies with a long
beep.
CODE
MEANING
00
NORMAL
UA
INDOOR-OUTDOOR UNIT COMBINATION FAULT
uo
REFRIGERANT SHORTAGE
U2
DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE
U4
FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR UNIT)
A1
INDOOR PCB DEFECTIVENESS
A5
FREEZE-UP PROTECTOR
A6
FAN MOTOR FAULT
C4
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
C9
FAULTY SUCTION AIR TEMPERATURE SENSOR
Er
NO COMMUNICATION BETWEEN MAIN CONTROLLER AND WI-Fl PCB
E1
CIRCUIT BOARD FAULT
E5
OL STARTED
E6
FAULTY COMPRESSOR START UP
E?
DC FAN MOTOR FAULT
EB
OVERCURRENT INPUT
F3
HIGH TEMPERATURE DISCHARGE PIPE CONTROL
F6
HIGH PRESSURE CONTROL (IN COOLING)
F8
OPERATION HALT DUE TO COMPRESSOR INTERNAL TEMPERATURE ABNORMALITY
HO
SENSOR FAULT
H6
OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR
H8
DC CURRENT SENSOR FAULT
H9
FAULTY SUCTION AIR TEMPERATURE SENSOR
J3
FAULTY DISCHARGE PIPE TEMPERATURE SENSOR
J6
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
L3
ELECTRICAL PARTS HEAT FAULT
L4
HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
L5
OUTPUT OVERCURRENT
P4
FAULTY INVERTER CIRCUIT HEATSINKTEMPERATURE SENSOR
• A short beep indicates non-corresponding codes.
• To cancel the code display, hold down
(cANCEL)
for about
5
seconds.
The code display also cancels itself if the button is not pressed for 1 minute.
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