Toshiba R410A Service Manual page 146

Check code Check code name
[F31] / [1C] Outdoor EEPROM error
(TCC-L / AI-NET)
YES
Is there any trouble of
outdoor unit power supply?
NO
Check I/F P.C. board.
Check code Check code name
[H01] / [1F] Compressor breakdown
(TCC-L / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
NO
Is power voltage of outdoor unit normal?
380 – 415V ± 10%
YES
YES
Does voltage drop occur
when other compressor starts?
NO
NO
Is connection of wiring or connection of
connector on IPDU P.C. board normal?
YES
Is winding resistance
NO
between phases of corresponding
compressor normal? (Note 1)
YES
YES
Is not it an abnormal overload?
NO
Take off lead cable of compressor.
1. Check resistance between windings:
It is normal if there are 0.7 to 0.9 .
2. Check insulation between outdoor
cabinet and terminal:
It is normal if there are 10M or more.
Check IPDU P.C. board.
Note 1
* 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
lead to the terminal firmly.
Cause of operation
1. Outdoor unit power error (Voltage, noise, etc.)
2. Outdoor I/F P.C. board error
Check power voltage and line.
Correct power line.
Check external noise, etc.
Cause of operation
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Cause of abnormal overload operation
5. IPDU P.C. board error
Correct power line.
Correct connector connection or wiring.
Compressor error
(Motor burning, etc.)
Correct cause of overload.
S C
R
Details of compressor
power connecting section
Check code Check code name
[H02] / [1d] Compressor error (Lock)
(TCC-L / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
NO
Is power voltage of
outdoor unit normal? 1
1 380 – 415V ± 10%
YES
YES
Does voltage drop occur
when other compressor starts?
NO
YES
Does OCR of MG-SW operate?
NO
NO
Is wiring or connector connection
on IPDU P.C. board normal?
YES
YES
Is not it an abnormal overload?
NO
YES
Is there no refrigerant stagnation
Is case heater output normal?
in compressor shell?
NO
Operation starts. Check case heater.
NO
Is compressor normal? 2
YES 2 Check the following items mainly.
1. Existence of abnormal sound and abnormal vibration during operation or starting
2. Abnormal overheat of case during operation or stop time (Never touch with hands.)
Check IPDU P.C. board.
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
[H03] / [17] Current detective
circuit system error
(TCC-L / AI-NET)
Sub-code: 01: Compressor 1 side 02: Compressor 2 side
NO
Wiring or connector connection
on IPDU P.C. board normal?
YES
Cause of operation
1. Outdoor unit power line error
2. Compressor circuit system error
3. Compressor error
4. Refrigerant stagnation in compressor shell
5. IPDU P.C. board error
Correct power line.
Reset OCR manually. 3
Correct connector connection
or wiring.
Correct cause of overload.
YES
Correct refrigerant stagnation
in compressor shell.
NO
Compressor error
Cause of operation
1. Cabling or connector connection error on IPDU P.C. board
2. IPDU P.C. board error
Correct connector connection or cabling.
Check IPDU P.C. board.