Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
107
2.5
Error Code Indication by Outdoor Unit PCB
<Selection of setting item>
<Monitor mode>
<Confirmation of error 1>
To enter the monitor mode, press the
MODE (BS1) button when in
“Setting mode 1”.
Press the SET (BS2) button and set
the LED display to a setting item.
Press the RETURN (BS3) button
once to display "First digit" of error
code.
<Confirmation of error 2>
Press the SET (BS2) button once to
display "Second digit" of error code.
Press the RETURN (BS3) button
and switches to the initial status of
“Monitor mode”.
∗
Press the MODE (BS1) button and
returns to “Setting mode 1”.
<Confirmation of error 3>
Press the SET (BS2) button once to
display "error location".
Detail
description
on next
page.
<Confirmation of error 4>
Press the SET (BS2) button once to
display "master or slave 1 or slave 2"
and "error location".
Contents of Error
Error code
In-phase error of DIII-Net
Detection of DIII-Net
E1
Discharge pressure Abnormality
HPS activated
E3
Suction pressure Abnormality
Pe abnormality
E4
Compressor lock
Detection of INV. compressor lock
E5
Overload, overcurrent
Detection of DC fan 1 motor lock
E7
Electronic expansion valve abnormality
EV1
E9
Defective sensor of outdoor air
temperature
Defective Ta sensor (short)
H9
Discharge pipe temperature abnormality Td abnormality
F3
Heat exchanger temperature abnormality Refrigerant overcharge
F6
Defective sensor of discharge pipe
temperature
Defective Tdi sensor (short)
J3
Defective sensor of suction pipe
temperature
Defective Ts1 sensor (short)
J5
Defective Ts2 sensor (short)
Defective sensor of heat exchanger
temperature
Defective Tb sensor (short)
J6
Defective sensor of discharge
Defective Pc sensor (short)
JA
Defective sensor of suction pressure
Defective Pe sensor (short)
JC
Defective Inverter PCB
Defective IPM
L1
Current sensor offset abnormality
IGBT abnormality
Defective Current sensor
SP-PAM overvoltage abnormality
Inverter radiation fin temperature rising Over heating of inverter radiation fin temperature
L4
DC output overcurrent
Inverter instantaneous overcurrent
L5
Electronic thermal
Electronic thermal switch 1
L8
Electronic thermal switch 2
Out-of-step
Speed down after startup
Lightening detection
Stall prevention (Limit time)
Stall prevention (Current increasing)
L9
Stall prevention (Start up error)
Wave form in startup abnormality
Out-of-step
Transmission error between inverter
and outdoor unit
Inverter transmission error
LC
Defective temperature sensor of
inverter radiation fin
Faulty radiation fin thermistor of
radiation fin
P4
Refrigerant shortage
Refrigerant shortage alarm
U0
Power supply voltage abnormality
Insufficient Inverter voltage
U2
Faulty charge of capacitor in main inverter circuit
Error due to SP-PAM overvoltage
Error due to P-N short circuit
No implementation of test-run
U3
Transmission error between indoor
and outdoor unit
I/O transmission error
U4
I/O transmission error
Conflict in wiring and piping, no setting
for system
Conflict in wiring and piping
UF
