Service manual

Troubleshooting by Remote Controller SiUS28-902_a
81 Troubleshooting
Malfunction code indication by outdoor unit P.C.B.
<Selection of setting item>
<Monitor mode>
<Confirmation of malfunction 1>
To enter the monitor mode, push the
MODE (BS1) button when in
“Setting mode 1”.
Push the SET (BS2) button and set
the LED display to a setting item.
Push the RETURN (BS3) button
once to display "First digit" of
malfunction code.
<Confirmation of malfunction 2>
Push the SET (BS2) button once to
display "Second digit" of malfunction
code.
Push the RETURN (BS3) button and
switches to the initial status of
“Monitor mode”.
∗ Push the MODE (BS1) button and
returns to “Setting mode 1”.
<Confirmation of malfunction 3>
Push the SET (BS2) button once to
display "malfunction location".
Detail
description
on next
page.
<Confirmation of malfunction 4>
Push the SET (BS2) button once to
display "master or slave 1 or slave 2"
and "malfunction location".
Contents of malfunction
Malfunction
code
In-phase malfunction of DIII-Net Detection of DIII-Net
E1
Abnormal discharge pressure HPS activated E3
Abnormal suction pressure Abnormal Pe
E4
Compressor lock Detection of INV. compressor lock
E5
Over load, overcurrent, Detection of DC fan 1 motor lock
E7
Malfunction of electronic expansion EV1
E9
Faulty sensor of outdoor air
temperature
Faulty Ta sensor (short)
H9
Abnormal discharge pipe temperature Abnormal Td
F3
Abnormal heat exchanger temperature Refrigerant over charge
F6
Faulty sensor of discharge pipe
temperature
Faulty Tdi sensor (short) J3
Faulty sensor of suction pipe
temperature
Faulty Ts1 sensor (short) J5
Faulty Ts2 sensor (short)
Faulty sensor of heat exchanger
temperature
Faulty Tb sensor (short) J6
Faulty sensor of discharge pressure
Faulty Pc sensor (short) JA
Faulty sensor of suction pressure
Faulty Pe sensor (short) JC
Faulty Inverter P.C.B. Faulty IPM L1
Abnormal Current sensor offset
Abnormal IGBT
Faulty Current sensor
Abnormal SP-PAM over-voltage
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 (Faulty start up)
Abnormal wave form in startup
Out-of-step
Transmission error between inverter
and outdoor unit
Inverter transmission error
LC