–116–
Checking code Meaning, detecting method Cause Checking method & Countermeasure
5201
5201
5203
5301
Pressure
sensor
abnormality
(outdoor unit)
IAC sensor/
circuit
abnormality
Pressure sensor abnormality (BC controller)
High
pressure
side
Intermedi-
ate
1
When pressue sensor detects
0.098MPa or less during opera-
tion, outdoor unit stops within a
3-minute restarting mode and re-
starts if the detected pressure of
pressure sensor exceeds
0.098MPa imediately before re-
starting.
2 If the detected pressure of sen-
sor is less than
0.098MPa
im-
mediately before restarting, er-
ror stop is commenced, display-
ing 5201.
3 Under 3 minutes restarting
mode, LED displays intermittent
fault check.
4 During 3 minutes after com-
pressor start, defrosting and 3
minutes after defrosting opera-
tions, trouble detection is ig-
nored.
When high or intermidiate pressure
sensor detects 0.098MPa or less
immediately before starting, error
stop is commenced displaying
“5201”, or “5203”.
1 IAC 3 Amps is detected just
before the inverter starts, or
IAC 3 Amps is detected dur-
ing inverter operation after 5
seconds has passed since the
inverter started when the INV
board’s SW1-1 is OFF.
[Inverter error detail : 6]
2 The current sensor (ACCT)
miss-wiring is detected during
inverter operation.
[Inverter error detail : 13]
1) Pressutre sensor trouble.
2) Inner pressure drop due to a leak-
age.
3) Broken cover.
4) Disconnected pin at connector por-
tion, poor contact.
5) Broken wire.
6) Faulty thermistor input circuit of
MAIN board.
1) Pressure sensor trouble.
2) Inner pressure drop due to gas leak.
3) Broken cover.
4) Disconnected pin at connector por-
tion, poor contact.
5) Broken wire.
6) Faulty pressure sensor input circuit
of control board.
1) Contact is faulty.
2) The current sensor (ACCT) is con-
nected with wrong polarity.
3) The wiring is defective
4) The Ac current sensor (ACCT) is
defective.
5) The IPM is defective.
See Troubleshooting of pressure
sensor.
See troubleshooting of pressure
sensor.
Check the contacts of CNACCT on the
INV board.
Check the ACCT_U, W polarity
with below drawing.
Check 1. connections.
2. contact at the connectors.
3. for broken wires in the follow-
ing wiring.
CNDR2-CNDR1
CN15V2-CN15V1
IPM-MC1
To judge failure of ACCT, go to “indi-
vidual Parts Failure Judgment Methods.”
Check the IPM.
Judge that the IPM is fauly, (Go to “In-
dividual Parts Failure Judgment Meth-
ods.”)
ACCT_U
U
ACCT_W
IPM-output
phase U
IPM-output
phase W
Compressor-input
phase U
Compressor-input
phase W
Red wire
Black wire
W
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