Service Manual

SiUS281811E Troubleshooting by Error Codes
Part 6 Service Diagnosis 183
Selection of setting item
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
return to “Setting mode 1”.
Confirmation of error 3
Press the SET (BS2) button once to
display "error location".
Detailed
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".
Monitor mode
Error Description Error Code
Inverter circuit capacitor high voltage Imbalance of inverter power supply
voltage
P1
Defective temperature sensor of
inverter radiation fin
Defective thermistor of inverter fin P4
Refrigerant shortage Refrigerant shortage alarm U0
Liquid pipe temperature abnormality
Abnormal power supply voltage Insufficient Inverter voltage U2
Open phase in inverter (Phase T)
Error due to SP-PAM overvoltage
Error due to P-N short circuit
3Unur-tset fo noitatnemelpmi oN
Transmission error between indoor
and outdoor unit
4Urorre noissimsnart O/I
Indoor unit system error
Transmission error of other system Indoor unit system abnormal in other
system or other indoor unit system
abnormal in own system
U9
Erroneous field setting System transmission error UA
Overconnection error of indoor units
Error of field setting
Refrigerant abnormal
Connection error (BP unit)
Conflict in wiring and piping, no setting
for system
Conflict in wiring and piping UF
HU)rorre sserdda-otuA( rorre g
niriWmetsys evitcefeD