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T ro ub l es h o o t ing
F a ul t d ia g no s is b y rem o t e co nt ro l l er
• In the ARC452A series, the temperature display sections on the main unit indicate
corresponding codes.
1.
W h en
is h el d d o w n fo r
5 seconds, a “
” indication flashes on the
t em p era t ure d is p l a y s ect io n.
2.
P res s
rep ea t ed l y unt il a co nt inuo us
b eep is p ro d uced .
• The code indication changes as shown below, and notifies with a long beep.
CODE
MEANING
SYSTEM
00
NORMAL
UA
INDOOR-OUTDOOR UNIT COMBINATION FAULT
U0
REFRIGERANT SHORTAGE
U2
DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE
U4
FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR UNIT)
INDOOR
UNIT
A1
INDOOR PCB DEFECTIVENESS
A5
HIGH PRESSURE CONTROL OR FREEZE-UP PROTECTOR
A6
FAN MOTOR FAULT
C4
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
C9
FAULTY SUCTION AIR TEMPERATURE SENSOR
OUTDOOR
UNIT
EA
COOLING-HEATING SWITCHING ERROR
E1
CIRCUIT BOARD FAULT
E5
OL STARTED
E6
FAULTY COMPRESSOR START UP
E7
DC FAN MOTOR FAULT
E8
OVERCURRENT INPUT
F3
HIGH TEMPERATURE DISCHARGE PIPE CONTROL
F6
HIGH PRESSURE CONTROL (IN COOLING)
H0
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 HEATSINK TEMPERATURE SENSOR
N O T E
• A short beep and 2 consecutive beeps indicate non-corresponding codes.
• To cancel the code display, hold the
down for 5 seconds. The code display also cancel itself if the button is not pressed for
1 minute.
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