Specifications

-163-
Checking code Meaning, detecting method Cause Checking method & Countermeasure
5201
5301
Pressure
sensor
abnormality
(Variable
capacity unit)
IAC sensor/
circuit
abnormality
(Variable
capacity unit)
When pressue sensor detects
or less during
stops with 3 minutes restarting
mode, and restarts if the detected
pressure of pressure sensor ex-
ceeds
If the detected pressure of sen-
sor is less than
immediately before
restarting,
error stop is commenced
displaying 5201.
Under 3 minutes restarting
mode, LED displays intermittent
fault check.
During 3 minutes after com-
pressor start, defrosting and 3
minutes after defrosting opera-
tions, trouble detection is ig-
nored.
If IAC
3 Amps is detected just
before the inverter starts, or
If 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]
If the current sensor (ACCT)
miss-wiring is detected during
inverter operation.
[Inverter error detail : 13]
1)
2) Inner pressure drop due to a leak-
age.
3) Broken cover.
4) Coming off of pin at connector por-
tion, poor contact.
5) Broken wire.
6) Faulty thermistor input circuit of
MAIN 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.
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 judgefailure of ACCT, go to “individual
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
0.098MPa imediately
before restarting.
0.098MPa
operation, outdoor unit once
0.098MPa
Pressure sensor trouble.1
2
3
4
1
2