Mitsubishi Electronics P500YMF-C, PURY-P400 specifications 116, CNDR2-CNDR1, IPM-MC1

Checking code

5201 Pressure sensor abnormality (outdoor unit)

5201	controller)	side
		High
		pressure
	(BC
5203		Intermedi-
	abnormalitysensorPressure
		ate
5301	IAC sensor/
	circuit
	abnormality

Meaning, detecting method		Cause	Checking method & Countermeasure
1 When pressue sensor detects	1)	Pressutre sensor trouble.	See Troubleshooting of pressure
1kg/cm2G (0.098MPa) or less dur-			sensor.
ing operation, outdoor unit once
stops with 3 minutes restarting	2)	Inner pressure drop due to a leak-
mode, and restarts if the detected		age.
pressure of pressure sensor ex-	3)	Broken cover.
ceeds 1kg/cm2G (0.098MPa)	4)	Coming off of pin at connector por-
imediately before restarting.		tion, poor contact.
	5)	Broken wire.

2If the detected pressure of sen- 6) Faulty thermistor input circuit of

sor is less than 1kg/cm2G		MAIN board.
(0.098MPa) immediately before
restarting, error stop is com-
menced displaying 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	1)	Pressure sensor trouble.	See troubleshooting of pressure
sensor detects 1kg/cm2G			sensor.
(0.098MPa) or less immediately be-
fore starting, error stop is com-	2)	Inner pressure drop due to gas leak.
menced displaying “5201”, or	3)	Broken cover.
“5203”.	4)	Coming off of pin at connector por-
		tion, poor contact.
	5)	Broken wire.
	6) Faulty pressure sensor input circuit
		of control board.

1 If IAC	3 Arms is detected just	1)	Contact is faulty.	Check the contacts of CNACCT on the
before the inverter starts, or				INV board.
If IAC	3 Arms is detected dur-
ing inverter operation after 5		2)	The current sensor (ACCT) is con-	Check the ACCT_U, W polarity
seconds has passed since the			nected with wrong polarity.	with below drawing.
inverter started when the INV
board’s SW1-1 is OFF.		3)	The wiring is defective	Check 1. connections.
[Inverter error detail : 6]				2. contact at the connectors.
				3. for broken wires in the follow-
2 If the current sensor (ACCT)				ing wiring.
miss-wiring is detected during				CNDR2-CNDR1
inverter operation.				CN15V2-CN15V1
[Inverter error detail : 13]				IPM-MC1
		4)	The Ac current sensor (ACCT) is	To judgefailure of ACCT, go to “individual
			defective.	Parts Failure Judgment Methods.”
		5)	The IPM is defective.	Check the IPM.
				Judge that the IPM is fauly, (Go to “In-
				dividual Parts Failure Judgment Meth-
				ods.”)

Compressor-input phase U

ACCT_U

U

IPM-output	Compressor-input
phase U	phase W
Red wire

ACCT_W

W

IPM-output phase W

Black wire

–116–