E-
24
If an error occurs during the operation, it is displayed on the outdoor unit PCB.
Outdoor unit
The table below give indication about self diagnostic routine. Some of error code requires activities exclusively
for Authorized Service Center.
Display
Content
Measure
Product operation status
in case of error
Error type
Outdoor unit compressor/
Outdoor unit fan
Indoor unit Communication
Error
Check the communication line for
indoor units, check the power supply
of the communication phase (DC)
Operation Off
Communication
Error
Communication time-out
error between indoor/out-
door unit 6-packet over error
Check the communication line for
indoor units, check the power supply
of the communication phase (DC)
Operation-off
Communication
Error
Indoor temperature sensor
(open/short error)
Check the temp. sensor of the indoor
unit room. Check the indoor PCB con-
nector CN21(white)
Operation-off
Indoor Sensor
Error
Indoor unit Eva In sensor
(open/short)
Check the indoor unit drainage pipe
sensor.Check the indoor PCB connec-
tor CN21 (white)
Operation-off
Indoor Sensor
Error
Dismount of indoor unit Eva
In sensor
Check the drainage pipe has been dis-
mounted
Operation-off
Indoor Sensor
Error
Secondary detection of
indoor floating switch
Check the indoor unit’s float sensor-
Check the indoor PCB connector CN51
(black)
Operation-off
Self Diagnosys
Error
Indoor unit not connected
Check the indoor unit connection.
Check the indoor unit option
Operation-off
Communication
error
1min. Time out Comm.
(Display Board : Onboard :
Indoor
↔
Outdoor)
•
Check the indoor unit connection
•
Check the indoor unit option
Operation-off
Communication
error
Communication error
between indoor/outdoor
unit INV and Main Micom (1
min.)
Check the Main MICOM.Check the
inverter MICOM
-
Communication
error
Outdoor temperature sensor
error
Outdoor temperature sensor error
Operation-off
Outdoor sensor
error
Outdoor temperature sensor
error
Check the connection status of the
sensorCheck the sensor locationCheck
the resistance values of sensor
Operation-off
Outdoor sensor
error
[inverter] Emission tempera-
ture sensor error
Check the connection status of the
sensorCheck the sensor locationCheck
the resistance values of sensor
Operation-off
Outdoor sensor
error
Excessive temperature emis-
sion
Not an error (discharge temp. control)
-
Outdoor unit
protection con-
trol error
Power cable connection
error
Check the status of power connection
Operation-off
Outdoor sensor
error
Troubleshooting
Summary of Contents for UH070CAV1
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