Trouble shooting 2
INDOOR UNIT Error Method:
Detective Actuators:
Detective details:
Forecast of Cause:
OK
YES
YES
NO
OK
Serial Communication Error
(Serial Forward Transfer Error)
Indoor unit Controller PCB
1. Connection failure 2. External cause 3. Controller PCB failure
Check Point 1-1 : Reset the power and operate
Does error indication reappear?
Check Point 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).
Check Point 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 mis-wiring)
Check Point 3 : Check the voltage of power supply
Check the voltage of power supply
>> Check if AC198V(AC220V-10%) - 264V(10%) appears
at outdoor unit terminal L3 - N.
Check Point 4 : Check serial signal (Forward transfer signal)
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.
When the outdoor unit cannot properly receive the serial signal from
indoor unit for 10 seconds or more.
02-07
+
-
Indicate or Display:
Outdoor unit :
POWER
MODE
ERROR
2
2
1
(L1)
(L2)
(L6)
(L5)
(L4)
(L3)
1
1
1
PUMP
DOWN
LOW
NOISE
PEAK
CUT
L1
L2
L3
N
1
BLACK
WHITE
RED
BLUE
BLACK
2
3
RED
WHITE
Indoor Unit : Operation lamp: 1 time Flash,
Timer lamp: 1 time Flash
Economy lamp : Continuous flash.
ERROR CODE : [E : 11]
