Toshiba MMU-AP0091H service manual F31 / 1C, H02 / 1d Compressor error Lock, H01 / 1F, 146, H03

Check code		Check code name			Cause of operation
[F31] / [1C]	Outdoor EEPROM error		1.	Outdoor unit power error (Voltage, noise, etc.)
(TCC-L / AI-NET)			2.	Outdoor I/F P.C. board error
Is there any trouble of		YES				Check power voltage and line.
						Correct power line.
outdoor unit power supply?
						Check external noise, etc.

Check code Check code name Cause of operation

[H02] / [1d]	Compressor error (Lock)	1. Outdoor unit power line error
(TCC-L / AI-NET)		2.	Compressor circuit system error
		3.	Compressor error
		4.	Refrigerant stagnation in compressor shell
		5.	IPDU P.C. board error

	NO
Check I/F P.C. board.
Check code			Check code name		Cause of operation
[H01] / [1F]		Compressor breakdown		1. Outdoor unit power line error
(TCC-L / AI-NET)				2. Compressor circuit system error
				3.	Compressor error
				4.	Cause of abnormal overload operation
				5.	IPDU P.C. board error

Sub-code:01: Compressor 1 side

Is power voltage of

outdoor unit normal? 1

YES

Does voltage drop occur

when other compressor starts?

NO

Does OCR of MG-SW operate?

NO

02: Compressor 2 side

NO

1 380 – 415V ± 10%

YES

YES

Correct power line.

Reset OCR manually. 3

146

Sub-code:01: Compressor 1 side 02: Compressor 2 side

NO

Is power voltage of outdoor unit normal?

380 – 415V ± 10%

YES

Is wiring or connector connection

on IPDU P.C. board normal?

YES

Is not it an abnormal overload?

NO

NO

YES

Correct connector connection

or wiring.

Correct cause of overload.

Does voltage drop occur		YES		Correct power line.
when other compressor starts?
	NO
Is connection of wiring or connection of		NO
			Correct connector connection or wiring.
connector on IPDU P.C. board normal?
	YES
Is winding resistance
		NO		Compressor error
between phases of corresponding
				(Motor burning, etc.)
compressor normal? (Note 1)
	YES
		YES
Is not it an abnormal overload?				Correct cause of overload.
	NO
		Take off lead cable of compressor.
		1. Check resistance between windings:			C
		It is normal if there are 0.7 to 0.9 .		S

2.Check insulation between outdoor cabinet and terminal:

It is normal if there are 10M or more.

Check IPDU P.C. board.

Note 1 R

*After checking the output, when connecting the compressor lead again to the compressor terminal, check surely there is no distortion on the Fasten receptacle terminal.

If it is loosened, caulk it with pinchers, etc and then connect	Details of compressor
lead to the terminal firmly.	power connecting section

Is there no refrigerant stagnation				YES			YES	Correct refrigerant stagnation
					Is case heater output normal?
	in compressor shell?							in compressor shell.
		NO				NO
	Operation starts.				Check case heater.
				NO
	Is compressor normal? 2							Compressor error
		YES	2 Check the following items mainly.
				1. Existence of abnormal sound and abnormal vibration during operation or starting
	Check IPDU P.C. board.			2. Abnormal overheat of case during operation or stop time (Never touch with hands.)

3.Current of compressor lead during operation or starting time (No varied change of current) change

3 If OCR operates even after manual reset of OCR, check whether the wiring to the current sensor (T02) of Comp-IPDU is correct or not.

Check code		Check code name			Cause of operation
[H03] / [17]		Current detective		1. Cabling or connector connection error on IPDU P.C. board
(TCC-L / AI-NET)		circuit system error		2. IPDU P.C. board error
Sub-code:01: Compressor 1 side 02: Compressor 2 side
Wiring or connector connection			NO
					Correct connector connection or cabling.
on IPDU P.C. board normal?
	YES
					Check IPDU P.C. board.