20
Display Board
(18k and 24k MODELS)
Operation:
The indicator flashes once every second after the power is on and will be illuminated when the unit is in operation.
TIMER Indicator:
The indicator illuminates then TIMER is set ON.
PRE-DEF. Indicator (For cooling & heating mode only - for cooling only, it's FAN ONLY):
The air conditioner begins defrosting automatically if the outdoor unit frosts in heating operation. At this time, PRE-DEF.
indicator illuminates.
For cooling only:
when the unit operates in FAN ONLY mode, the FAN ONLY indicator illuminates.
AUTO Indicator:
This indicator will flash when the air conditioner is in AUTO operation.
AUTO
TIMER
PRE.-DEF.
OPERATI ON
TROUBLESHOOTING
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Mode
Operation
Lamp
Timer
Lamp
Indoor fan speed is abnormal for over 1 minute
Õ
x
Indoor room temperature or evaporator sensor is
open circuit or short circuit
Õ
ON
Overcurrent protection of the compressor occurs 4 times
x
Õ
Control Board error
ON
Õ
Indoor unit communication error
Õ
Õ
Outdoor condenser temperature sensor is
open circuit or short circuit
Õ
Õ
x
= Off
Õ
= Flashing
Mode
Operation
Lamp
Timer
Lamp
Defrosting
Lamp
Auto
Lamp
Overcurrent protection of the compressor occurs 4 times
Õ
Õ
Õ
Õ
Indoor room termperature sensor is
open circuit or short circuit
x
Õ
x
x
Temperature sensor on indoor evaporator is
open circuit or short circuit
Õ
x
x
x
Temperature sensor on outdoor condenser is
open circuit or short circuit
(without for cooling only models)
x
x
Õ
x
Outdoor unit protects (outdoor temperature sensor,
phase, order, etc.)
x
x
Õ
Õ
Control Board error
x
Õ
x
Õ
Indoor unit communication error
x
x
x
Õ
x
= Off
Õ
= Flashing
12K Models
18K & 24K Models
Illuminates simultaneously
Illuminates alternately
