28
Fault diagnosis.
FAULT DIAGNOSIS BY REMOTE CONTROLLER
In the ARC452A series, the temperature display sections on the main unit indicate corresponding codes.
When the TIMER CANCEL button is held down for 5 seconds, a “
1.
” indication
fl
ashes on the temperature display section.
Press the TIMER CANCEL button repeatedly until a continuous beep is produced.
2.
The code indication changes as shown below, and noti
fi
es with a long beep.
•
CODE
MEANING
SYSTEM
00
NORMAL
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
E5
OL STARTED
E6
FAULTY COMPRESSOR START UP
E7
DC FAN MOTOR FAULT
E8
OPERATION HALT DUE TO DETECTION OF INPUT OVER CURRENT
F3
HIGH TEMPERATURE DISCHARGE PIPE CONTROL
F6
HIGH PRESSURE CONTROL (IN COOLING)
H6
OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR
H8
CT ABNORMALITY
H9
FAULTY SUCTION AIR TEMPERATURE SENSOR
J3
FAULTY DISCHARGE PIPE TEMPERATURE SENSOR
J6
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
L4
HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
L5
OUTPUT OVERCURRENT
P4
FAULTY INVERTER CIRCUIT HEATSINK TEMPERATURE SENSOR
NOTE
A short beep and two consecutive beeps indicate non-corresponding codes.
1.
To cancel the code display, hold the TIMER CANCEL button down for 5 seconds. The code display also cancel itself if the button is
2.
not pressed for 1 minute.
TIMER CANCEL button
It cancels the timer setting.
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12/22/2008 2:51:39 PM
12/22/2008 2:51:39 PM
