: Flashes in 2-sec intervals (normal) : On : Off : Flashes 3 times in 0.2-sec intervals
Status of
indoor/
outdoor units
Indication
by LED on
outdoor
unit
Indication by operation lamp on indoor unit
Content of diagnosis
Main category Sub-category
Inspection location/method Remedy
Lighting pattern at the time of timer lamp lighting
Off for 5 seconds
Main
category
Sub
category
Malfunction No.
Outdoor unit
cooling/heating
switchover
Indoor/
outdoor unit
in compleate
shutdown
Thermistor install-
tion error or 4-way
valve error
-3
Torque control
error
Indoor/
outdoor unit
in compleate
shutdown
EEPROM error
EEPROM (outdoor)
error
EEPROM (outdoor)
data error
*3: The content of diagnosis is transferred to the indoor unit via serial communication, but it does not trigger a complete shutdown operation. Number of repetition °: No complete shutdown
9 time
(1) Check to make sure outdoor unit
thermistor TH2 (heat exchanger) and TH5
(2-way valve) are installed in correct
posittions.
(2) Measure resistance of thermistor TH1
and TH5.
(3) Check the 4-way valve for proper
operation.
(4) No abnormality found in above inspections
(1) through (3).
(1) Correct the installation.
(2) Replace the thermistor assembly.
(3) Replace the 4-way valve.
(4) Replace the outdoor unit control PWB
assembly.
(1) Check if the refrigerant volume is
abnormally low.
(2) Check the 4-way valve for proper
operation.
(3)
Check to see compressor type is correct
(1) Change the speccified amount of
refrigerant.
(2) Replace the 4-way valve.
(3) Replace the compressor with correct.
-4
Gas leak error
(1) Check to make sure outdoor unit
thermistor TH2 (heatexchange)
or indoor unit thermitor TH2(Heat
exchange) is installed in correct poctions.
(1) Correct the installation.
(2) Change the speccified amount of
refrigerant.
10 time
-0
(1) Replace the outdoor unit control PWB
assembly.
(1) Check the connector CN3 of the outdoor
unit DC fan motor for secure installation.
(2) Check outdoor unit DC fan motor for
proper rotation.
(3) Check fuse FU3.
(4) Outdoor unit control PCB.
(1) Correct the installation.
(2) Replace the outdoor unit fan motor.
(3) Replace the outdoor unit control
PCB assembly.
(4) Replace the outdoor unit control
PCB assembly.
Outdoor unit DC fan
rotation error.
Operation lamp
Cluster lamp
Outdoor unit DC
fan
12 time
11 time
12 -0
11
-0
11 time
11
Indoor/
outdoor units
in complete
shutdown
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
-0
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
10
(2) Check if the refrigerant volume is
abnomally low.
Outdoor terminal
bord fuse.
Outdoor terminal
bord fuse open e-
rror.
(1) Check the connector CN10 for secure in-
stallation.
(2) Check the fuse open of outdoor terminal
board.
(1) Correct the installation.
(2) Replace the outdoor terminal board.
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