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TROUBLESHOOTING GUIDE
INDICATION LAMP
Micro computer self-diagnose the points of the troubles and inform it by the combination of the status (On, Flush, or
Off) of three lamp indicators on the front panel of the indoor unit.
ALARM
INDICATION TIME
APPEARANCE, PORTION, PARTS
SEEMED WRONG
MOMENTARY STOP OF POWER
(IN CASE OF LIGHTNING)
DROP OF POWER VOLTAGE
check the plug inserted into the outlet and the power supply
emergency operation (display of remote controller is faint or not)
check the electric continuity by tester
check the electric continuity by tester
emergency operation
other than described above
15 sec. later after main power on, if alarm indication appears, PCB
(TAN main) should be replaced
check the current fuse (1A) on the wiring (red) for fan motor (TAN)
by tester
if the current fuse is cut, fan motor(TAN) is defective
if not, fan motor(TAN) or PCB (TAN main) is defective
check the power voltage (230V)
check the voltage of fan motor [see fig.2]
METHOD OF CHECK
(press the ON/OFF button of remote controller in case of reset)
POWER
(green)
TIMER
(yellow)
OPERATION
(green)
INDICATION LAMP
OFF
OFF
OFF
TAN, TAG do not work at all
FLASHING
OFF
OFF
FLASHING
ON
ON
ON
ON
FLASHING
FLASHING
ON
OFF
alarm indication appears
immediately when press
operation switch
OFF
OFF
FLASHING
FLASHING
OFF
FLASHING
TAN, TAG don’t work at all,
and after 20 sec., operation
lamp is flashing (2 min. in
case of power on)
normal lamp indication
turn alarm when
something is wrong with
TAN, TAG
error of transmission
CT disconnection
OFF
FLASHING
OFF
FLASHING
FLASHING
OFF
OFF
or
30
〜
40 min. later after
compressor start, the yellow
lamp is flashing and TAN,
TAG stop running
sensor discharge operate
because temperature of
discharge tube beyond
120
°
C, or sensor
discharge is bad quality
protective action against
excessive AC current
detection
FLASHING
FLASHING
ON
FLASHING
ON
FLASHING
once stop running with
power lamp lighting when
something is wrong with
TAN, TAG, and start
running again after 3
〜
20 min.
later after that in case of
reoccurrence, alarm
indication appears
protective action against
excessive DC current
detection
or
abnormal revolution of
compressor
in case of heating
operation, a rise of
temperature (above 58
°
C)
of RC heat exchanger or
less quantity of RC blow
FLASHING
FLASHING
OFF
FLASHING
ON
ON
FLASHING
FLASHING
in case of heating operation,
after a few minutes operation,
all lamps are flashing and
TAN, TAG stop running
15 sec. later after main
power on, or 60 sec.
later after start running
through remote controller,
alarm indication appears
40
〜
70 sec. later after
start running, alarm
indication appears
90 sec. later after
start running, alarm
indication appears
accident of controller
accident of fan motor
short or open of sensor,
temperature or incomplete
insertion of connector
PCB (TAN MAIN)
PCB (TAG MAIN)
FAN MOTOR (TAG)
FAN MOTOR (TAN)
SENSOR, TEMP. ROOM
SENSOR, TEMP. HEAT EXCHANGER
SENSOR, TEMP. DEFROST
SENSOR, TEMP. DISCHARGE
FILTER IS CHOKED
SENSOR, TEMP. HEAT EXCHANGER
PCB (TAN MAIN)
UNREASONABLE OPERATION
UNDER OVERLOAD
MOMENTARY STOP OF POWER
(IN CASE OF LIGHTNING)
DROP OF POWER VOLTAGE
PCB (TAG MAIN)
ACCIDENT OF POWER MODULE
COMPRESSOR LOCKING
POWER SUPPLY
REMOTE CONTROL
FUSE(3.15A)
TAN TERMINAL BLOCK
PCB (RECEIVER & DISPLAY)
PCB (TAN MAIN)
MIS-WIRING (TAG-TAN CONNECTING
CABLE) OR RARE CONTACT
CUTTING OFF CT
CURRENT FUSE . (25A) FUSING
(ON THE PCB (TAG MAIN))
GAS LEAKAGE
VALVE, SERVICE IS CLOSED
PIPE
SENSOR, TEMP. DISCHARGE
check the place of installation (blockage of air inlet & outlet of TAN,
TAG) check the excessive gas
check the movement by reoperation
check the power voltage (230V)
UNREASONABLE OPERATION
UNDER OVERLOAD
check the place of installation (blockage of air inlet & outlet of TAN,
TAG) check the excessive gas
check by eyes and clean it
check the resistance by tester [see table 2]
other than described above
check the movement by reoperation
check the power voltage (230V)
See Flow Chart (P19)
change the PCB (TAG main)
check the wiring connection and rare contact
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance by tester [see table 2]
check the resistance by tester [see table 3]
check the point of leakage (discharge temperature rise in case of
small leakage), measure the pressure of compressor during fixed
operation (operation frequency 58 Hz)
check the valve by eyes
check by eyes
check the resistance by tester [see table 3]
check the electric continuity between 1 and 5 in connector by
tester.[see fig. 1]
(if it is no continuity, both PCB (TAG main) and power module
should be replaced.)
check the current fuse 250V3.15A on the PCB (TAG main) by tester
if it is burnt down fan motor (TAG) is defective
if not, fan motor(TAG) or PCB (TAG main) is defective
60 sec. later after start running through remote controller, if alarm
indication appears, PCB (TAG main) should be replaced
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check the drain hose by eyes (it might be folded or choked)
check the TAN whether lean or not
not cool down
not warm up
water leakage
louver doesn' t work
※
In this table TAN means indoor unit and TAG means outdoor unit.
check the resistance by tester [see fig.4]
check the point of leakage measure the pressure of compressor
during fixed operation (operation frequency 58 Hz)
nasty smell
FILTER IS CHOKED
NO USE FOR A LONG TIME
NASTY SMELL
(CIGARETTE, FURNITURE, ETC.)
DRAINAGE
MIS-INSTALLATION
LOUVER MOTOR
GAS LEAKAGE
SENSOR, TEMP. ROOM
SENSOR, TEMP. HEAT EXCHANGER
4-WAY VALVE
SHORT CYCLE
(INSUFFICIENT AIR CIRCULATION)
check by eyes and clean it
use deodorizer
check the resistance by tester [see table 1]
check the resistance by tester [see table 2]
check the resistance by tester [see fig.3]
check the blockage of air inlet & outlet of TAN, TAG
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TAN/TAG-A28EWI, TAN/TAG-A32EWI
