OK
YES
Test 4 : Check serial signal (Forward transfer signal)
NO
OK
1. Connection failure 2. External cause 3. Controller PCB failure
Test 1-1 : Reset the power and operate
Does error indication reappear?
Test 1-2 : Check external cause such as noise
Check if the ground connection is proper.
Check if there is any equipment that causes harmonic wave
near the power cable (Neon light bulb or any electronic
equipment which causes harmonic wave).
Test 2 : Check connection
Check any loose or removed connection line of
between indoor unit and outdoor unit.
>> If there is an abnormal condition, correct it by
referring to Installation Manual or Data &
Technical Manual.
Check connection condition in control unit.
(If there is loose connector, open cable or miss-wiring)
Test 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears
at outdoor unit terminal L - N.
Check serial signal (Forward transfer signal)
>> Check if indicated value swings berween AC30v and AC130V at outdoor unit terminal 2 - 3.
>> If it is abnormal, replace Controller PCB.
1
2
3
L
N
RED
WHITE
BLACK
BLACK
WHITE
+
-
POWER
MODE
ERROR
2
2
1
(L1) (L2) (L6)(L5)(L4)(L3)
1
1
1
PUMP
DOWN
LOW
NOISE
PEAK
CUT
Trouble shooting 2
Serial Communication Error
(Serial Forward Transfer Error)
Outdoor unit :
Indoor unit controller PCB
When the indoor unit cannot properly receive the serial signal from indoor unit
for 10 seconds or more.
Detective Actuators: Detective details:
Indicate of Display:
Forecast of Cause:
02-05
INDOOR UNIT Error Method:
n
: n times blinking
: Light ON: Light OFF
Indoor Unit :
Operation lamp: 1 times Flash,
Timer lamp : 1 times Flash
ERROR CODE : [E : 11]