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SiUS30-1301
Troubleshooting by Remote Controller
Service Diagnosis
149
<Selection of setting item>
<Confirmation of error 1>
To enter the monitor mode, press
the MODE button (BS1) when in
“Setting mode 1”.
Press the SET button (BS2) and set
the LED display to a setting item.
Press the RETURN button (BS3)
once to display “First digit” of error
code.
<Confirmation of error 2>
Press the SET button (BS2) once to
display “Second digit” of error code.
Press the RETURN button (BS3)
and switches to the initial status of
“Monitor mode”.
∗
Press the MODE button (BS1) and
returns to “Setting mode 1”.
<Confirmation of error 3>
Press the SET button (BS2) once to
display “master or slave1 or slave2”
and “error location”.
∗
Refer to P.111 for Monitor mode.
∗
Refer to P.111 for Monitor mode.
Detail
description
on next
page.
Contents of error
Error code
Refrigerant shortage
Refrigerant shortage alarm
U0
Reverse phase
Reverse phase error
U1
Abnormal power supply voltage
Insufficient inverter voltage
U2
Inverter open phase (phase T)
Charging error of capacitor in inverter main circuit
No implementation of test-run
U3
Transmission error between indoor and
condensing unit
I/O transmission error
U4
Transmission error between condensing
units, transmission error between thermal
storage units, duplication of IC address
O/O transmission error
U7
Transmission error of other system
Indoor unit system error in other system or
other unit of own system
U9
Erroneous onsite setting
Abnormal connection with excessive
number of indoor units
UA
Conflict of refrigerant type in indoor units
Faulty system function
Incorrect wiring (Auto address error)
UH
Transmission error in accessory devices, conflict
in wiring and piping, no setting for system
Abnormality multi level converter,
abnormality in conflict check
UJ
UF