Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
E5
Communication error during operation
Keeps flashing
*See below
Keeps flashing
2 time flash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Does
the remote control LCD
becomes normal?
Reset the power source and restart.
YES
NO
* In case that indoor unit red LED stays OFF
Is the
connection of signal wires
at the outdoor unit side
OK?
Is the
connection of signal wires
(between indoor and outdoor units)
OK?
Does the
remote control LCD
becomes normal?
Note (1) Check the connection (disconnection, looseness)
of signal wires at outdoor unit terminal block
Reset the power source and restart.
Note (2) Check the connection (disconnection, looseness,
brakage) of signal wires (between indoor and
outdoor units)
YES
NO
YES
NO
YES
NO
* In case that indoor unit red LED flashes 2 times
Repair signal wires.
Repair signal wires.
Go to the diagnosis of
WAIT
/Searching IU (1).
Unit is normal.
(Malfunction by temporary
noise, etc.)
Outdoor unit control PCB anomaly
(Network communicaion
circuit anomaly)
→ Replace it.
Unit is normal.
(Malfunction by temporary
noise, etc.)
2. Error detection method
When the communication
between indoor and outdoor
units is interupted for more than
2 minutes
3
.
Condition of error displayed
When this anomaly is detected
during operation.
4. Presumable cause
• Unit address No. setting error
•
Remote control wires broken
•
Poor connection/disconnection
of remote control wires
•
Indoor unit control PCB anomaly
Note:
When the pump down switch is turned on, communication between indoor and outdoor units is cancelled so that
"Communication error E5" will be displayed on the remote control and indoor unit control PCB, but this is normal.
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
E6
7-segment display:
Indoor unit heat exchanger
temperature sensor anomaly (Thi-R)
Keeps ashing
1-time ash
Keeps ashing
Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is
the connector of
temperature sensor
connected properly ?
Regarding the characteristics of
the temperature sensor, see the following chart.
Are
the characteristics
of temperature sensor OK?
*1
NO
NO
YES
*1 Check several times to prove any poor connection
YES
T
emperarture sensor resistance (kΩ
)
Temperature-resistance characteristics of
indoor unit heat exchanger temperature sensor
(Thi-R1, R2, R3)
5kΩ at 25ºC
Temperature (ºC)
Insert the connector
securely.
Replace temperature
sensor. (Thi-R)
Replace indoor unit PCB.
2. Error detection method
Detection of anomalously low
temperature (resistance)
of Thi-R1, R2, R3
3
.
Condition of error displayed
• When disconnection is
detected continuously for 5
seconds, or short circuit is
detected continuously for 5
seconds.
4. Presumable cause
• Anomalous connection of
indoor unit heat exchanger
temperature sensor
• Indoor unit heat exchanger
temperature sensor anomaly
• Indoor unit PCB anomaly
Note:
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