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P4
Heat-radiatingn
thermistor malfunction
(Outdoor unit)
Abnormal stop is applied
depending on the model or
condition.
U0
Suction piping temperature
abnormal (Outdoor unit)
The refrigerant may be
insufcient.
Abnormal stop is applied
depending on the model or
condition.
U2
Power voltage malfunction
(Outdoor unit)
The inverter open-phase or
main circuit condenser may
be malfunctioning.
Abnormal stop is applied
depending on the model or
condition.
U4
UF
Transmission error
(between indoor and
outdoor units)
Wiring error between
indoor and outdoor unit. Or
Indoor and outdoor Printed
Circuit Board failure.
U5
Transmission error
(between indoor and
remote controller units)
Transmission between
indoor unit and remote
controller is not performed
properly.
U7
Transmission error of the
inverter module
UA Field setting error
System setting error of the
simultaneous on/off multi-
split type.
UE
Transmission error
(between indoor unit
and centralized remote
controller)
UC
Remote controller address
setting error
CAUTION
After test operation is completed, check the items mentioned
in the clause 2 2. Items to be checked at time of delivery on
page 4.
Iftheinteriornishworkisnotcompletedwhenthetest
operationisnished,forprotectionoftheairconditioner,ask
theusernotoperatetheairconditioneruntiltheinteriornish
work is completed.
If the air conditioner is operated, the inside of the indoor units
may be polluted by substances generated from the coating and
adhesivesusedfortheinteriornishworkandcausewater
splash and leakage.
To the operator carrying out test operation
After test operation is completed, before delivering the air
conditionertotheuser,conrmthattheelectricalwiringbox
cover is closed.
In addition, explain the power supply status (power supply ON/
OFF) to the user.
19 English
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