Daikin FVXM25FV1B Operation Manual page 37

Fault diagnosis.
FAULT DIAGNOSIS BY REMOTE CONTROLLER
In the ARC452A series, the temperature display sections on the main unit indicate corresponding codes.
1. When the TIMER CANCEL button is held down for 5 seconds, a "
the temperature display section.
2. Press the TIMER CANCEL button repeatedly until a continuous beep is produced.
• The code indication changes as shown below, and notifies with a long beep.
CODE
SYSTEM
INDOOR UNIT
OUTDOOR
UNIT
NOTE
1. A short beep and two consecutive beeps indicate non-corresponding codes.
2. To cancel the code display, hold the TIMER CANCEL button down for 5 seconds. The code
display also cancel itself if the button is not pressed for 1 minute.
TIMER CANCEL button
It cancels the timer setting.
00
UA
U0
U2
U4 FAILURE OF TRANSMISSION (BETWEEN INDOOR UNIT AND OUTDOOR UNIT)
A0
A1
A5 HIGH PRESSURE CONTROL OR FREEZE-UP PROTECTOR
A6
C4
C9
CH
EA
E1
E5
E6
E7
E8
F3
F6
H0
H6 OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR
H8
H9
J3
J6
L3
L4
L5
P4 FAULTY INVERTER CIRCUIT HEATSINK TEMPERATURE SENSOR
MEANING
NORMAL
INDOOR-OUTDOOR UNIT COMBINATION FAULT
REFRIGERANT SHORTAGE
DROP VOLTAGE OR MAIN CIRCUIT OVERVOLTAGE
DETECTION OF REFRIGERANT LEAK
INDOOR PCB DEFECTIVENESS
FAN MOTOR FAULT
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
FAULTY SUCTION AIR TEMPERATURE SENSOR
ABNORMALITY OF REFRIGERANT LEAKAGE SENSOR
COOLING-HEATING SWITCHING ERROR
CIRCUIT BOARD FAULT
OL STARTED
FAULTY COMPRESSOR START UP
DC FAN MOTOR FAULT
OVERCURRENT INPUT
HIGH TEMPERATURE DISCHARGE PIPE CONTROL
HIGH PRESSURE CONTROL (IN COOLING)
SENSOR FAULT
DC CURRENT SENSOR FAULT
FAULTY SUCTION AIR TEMPERATURE SENSOR
FAULTY DISCHARGE PIPE TEMPERATURE SENSOR
FAULTY HEAT EXCHANGER TEMPERATURE SENSOR
ELECTRICAL PARTS HEAT FAULT
HIGH TEMPERATURE AT INVERTER CIRCUIT HEATSINK
OUTPUT OVERCURRENT
" indication flashes on
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