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4. Service procedures
1
2
3
4
Section
– 58 –
SM830076
(3) Meanings of alarm messages
If an error occurred in the air conditioner, the error condition is presented by indicating the
error code in the wired remote controller display or by the combination of lamp statuses for
operation, timer and heat stand-by (OFF status and flashing status).
Remote controller is detecting
unusual signal from indoor unit.
Wired remote
controller
display
Wireless remote
controller
display
Possible causes of troubles
Improper setting of indoor unit or
remote controller.
Indoor unit is detecting unusual
signal from signal option.
Improper setting of indoor unit or
remote controller.
Indoor unit is detecting
unusual
signal from outdoor unit.
Outdoor unit is detecting
unusual signal from indoor unit.
Auto. address setting is not
correct.
Indoor unit is detecting unusual
signal from another indoor unit.
Improper setting of indoor unit or
remote controller.
• Serial communication errors • Mis-setting• Mis-setting
Thermal protector in indoor fan motor is activated.
Float switch is activated.
• Thermal protector in outdoor fan motor is activated.
• Compressor thermal protector is activated.
• Power supply voltage is unusual. (The voltage is more than
260 V or less than 160 V.)
Discharge gas temperature of comp. is unusual.
High pressure switch is activated.
Voltage drops.
Other indooor unit is warning.
Improper wiring connections of ceiling panel.
Protective device in indoor unit
is activated.
Protective device in outdoor unit
is activated.
Operation lamp and heat
stand-by lamp flash
alternately.
O: Operation lamp
ⅷ: Timer lamp
O: Heat stand-by
lamp
Operation lamp and
heat stand-by lamp
flash at the same time.
O:Operation lamp
ⅷ: Timer lamp
O:Heat stand-by
lamp
Error receiving of serial communications signal.
Error transmitting of serial communications signal.
Indoor unit address setting is duplicated.
Remote controller address (RCU.ADR) is duplicated.
Error transmitting of serial communications signal
Error receiving of serial communications signal.
When using flexible combination control, main indoor unit address
setting is duplicated. (judged by outdoor unit.)
Error receiving of serial communications signal.
Error transmitting of serial communications signal
Error receiving of serial communications signal.
(Confirmation error of unit numbers included)
Error transmitting of serial communications signal.
No. of judged indoor units or total capacity of indoor units is small.
No. of judged indoor units or total capacity of indoor units is large.
Error transmitting of serial communications signal
Error receiving of serial communications signal.
Indoor unit group address is not correct.
Model setting of indoor unit is not matching the outdoor unit.
When using group control, main indoor unit address setting is duplicated.
(judged by indoor unit.)
Outdoor unit address is duplicated.
Improper wiring between indoor units.
(There is a group connection wiring in case of individual control.)
Indoor unit address (or group address) is not set.
Capacity code of indoor unit is not set.
Improper wiring of group control wiring.
Indoor unit model setting is improper (capacity)
E01
E02
E03
E08
E09
E10
E11
E14
E04
E05
E06
E07
E15
E16
E17
E18
L01
L02
L03
L04
L07
L08
L09
L11
L13
P09
P01
P10
P02
P03
P04
P05
P31
• Indoor unit is detecting unusual signal from the remote controller and group control.
(No serial communications signal)
Heat stand-by
lamp flashes
ⅷ:Operation lamp
ⅷ: Timer lamp
O:Heat stand-by
lamp
Operation lamp
flashes
O:Operation lamp
ⅷ: Timer lamp
ⅷ:Heat stand-by
lamp
• Activation of protective device
ⅷ:Operation lamp
O: Timer lamp
O: Heat stand-by
lamp