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10.3 Alarm codes for indoor/outdoor units ECOi MF3
Error group
Serial commu-
nication errors
Mis-setting
Thermistor fault
PAW-VP•LDHW - Technical Manual – 2020-07
Symptoms
Remote controller is detecting error signal
from indoor unit.
Remote Controller does not respond to indoor unit.
Outdoor unit is detecting error signal from
indoor unit.
Indoor unit is detecting error signal from
outdoor unit.
Improper setting of indoor unit or remote
controller
Improper setting
Indoor unit communication error of group
control wiring
During auto address setting, number of
connected units does not correspond to
number set.
Improper setting
Indoor thermistor is either open or damaged
Error Codes PACi & ECOi
Possible causes / Remedy
Indoor unit does not respond to remote controller.
The remote controller is having error in sending serial communica-
tion signal.
Outdoor unit does not respond to indoor unit.
Some indoor units does not respond to outdoor unit.
Indoor unit address is dupulicating.
Two or more remote controllers are set as main on R1-R2 link.
Auto Address failed to start.
No response from sub indoor to the main indoor unit in group
control wiring.
Fewer indoor units are found in Auto Addressing than the
setting on outdoor PCB.
More indoor units are found in Auto Addressing than the
setting on outdoor PCB.
No indoor unit responded in Auto Addressing.
No response from sub outdoor unit.
The outdoor unit address is duplicating.
The number of responding outdoor units does not match with the
setting on the main outdoor unit.
No response from main outdoor unit.
The outdoor unit is having error in sending serial communication
signal on main-sub communication line.
Error in communication inside outdoor unit control box.
Indoor unit address setting has error. (No main indoor unit in group
control.)
Indoor unit model does not match with the outdoor unit model.
(Multi-split/mini-split)
Two or more indoor units are set as main in group control.
Two or more indoor units are set as priority indoor unit (priority
indoor unit).
Two or more indoor units are set as priority indoor unit (nonpriority
indoor unit).
Group control wiring is detected for indoor unit set as individual
control.
Indoor unit address is not set.
Capacity setting of indoor unit is not correct.
Duplicate system address setting on outdoor units.
Capacity setting of outdoor unit is not correct.
Incorrect wiring of remote group control wiring (in case of shared
solenoid valve kit)
Indoor unit model does not match with outdoor unit.
Model mismatch between outdoor units.
Indoor unit heat exchanger liquid temperature sensor has failure. (E1)
Indoor unit heat exchanger temperature sensor has failure. (E2)
Indoor unit heat exchanger gas temperature sensor has failure. (E3)
Indoor suction air (room) temperature sensor has failure. (TA)
Indoor discharge air temperature sensor has failure. (BL)
Wired remote
controller display
<E01>
<E02>
<<E03>>
E04
E06
E08
<<E09>>
E12
E18
E15
E16
E20
E24
E25
E26
E29
E30
E31
L01
<<L02>>
<L03>
L05
L06
L07
L08
<<L09>>
L04
L10
L11
10
L13
L17
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
Continued on the next page
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