Toshiba MMD-AP0071SH-C Service Manual page 96

Check code name Check code name
[H16] / [d7] TK4 temperature detective circuit error
(Sub-code: 04)
(d07 / AI-NET)
YES
Is not TK4 sensor detached?
NO
YES
Is there no miscabling or misinstallation
on TK1/TK2/TK3/TK4 sensors?
NO
NO
Are characteristics of TK4 sensor
resistance value normal?
YES
YES
Does OCR of MG-SW operate?
NO
No error
Check the clogging of SV3E valve.
( 1)
1 Refer to item [H07] error.
Error
2 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.
Replace SV3E valve.
Check the clogging of SV3E valve.
Check code name Check code name
[L03] / [96] Duplicated indoor header units
(d07 / AI-NET)
1) Check the connection changing of the remote controller after the connection has been changed.
2) If the group configuration and address are normal when power has been turned on, the mode automatically shifts
to address setup mode. (Re-setup of address) → Refer to "Address setup".
Cause of operation
1. Detachment of TK4 sensor, miscabling,
characteristics error of resistance value
2. Check clogging and malfunction of
SV3E valve circuit.
3. Oil-equalization circuit error
(Check capillary clogging, strainer
clogging)
4. Refrigerant stagnation in compressor
shell
Correct installation of sensor.
Correct miscabling/misinstallation.
TK1: CN514
( )
TK2: CN515
TK3: CN516
TK4: CN523
Sensor error Replace
Reset OCR manually.( 2)
Check I/F P.C. board
Cause of operation
There were two or more indoor header
units in some remote controller group
control.
Check code name Check code name
[L04] / [96] Duplicated setup of outdoor line address
(d07 / AI-NET)
YES
Is there duplicated line address setup?
NO
NO
Are communication cable connections of
[U1.U2], [U3.U4], and [U5, U6] normal?
YES
Check outdoor I/F P.C. board.
Failure Replace
Check code name Check code name
[L05] / [96] Duplicated indoor units with priority
(Displayed on indoor unit with priority)
(d07 / AI-NET)
This check code is displayed on the set indoor unit when setup of indoor unit with priority is duplicated.
• Priority setup with two or more units is not available. Choose one prior unit in one refrigerant circuit system.
Check code name Check code name
[L06] / [96] Duplicated indoor units with priority
(Displayed on the indoor unit other than
(d07 / AI-NET)
one with priority and on the outdoor unit)
Sub-code: No. of indoor units with priority
When indoor unit with priority is duplicated, this check code is displayed on the unit other than the setup indoor unit
and outdoor unit.
• As only one indoor unit with priority is valid, change the setup.
Cause of operation
Outdoor line addresses are duplicated.
Correct the line address setup.
Correct the cable connection.
Re-set up the address.
(Refer to "Address setup".)
Cause of operation
1. Two or more prior indoor units exist.
Cause of operation
Two or more indoor units with priority
are duplicated.