Toshiba A90-0132, Service Manual

Page: 78 / 176

78
14
Troubleshooting
Self diagnostic function
Over capacity
Abnormal phase connection
Indoor drain overflow alarm
Liquid crystal remote controller CHECK code
Remote
controller
Remote controller
Indoor
unit
Outdoor
unit
Remote controller serial signal circuit “99”
Indoor unit
Indoor sensor (TA) short or open circuit “OC”
Indoor heat exchanger sensor (TC1) short circuit “93”
Indoor heat exchanger sensor (TC2) short circuit “94”
Indoor pressure sensor short circuit “b9”
Motor short circuit “11”
Drain pump fault “0b”
Refrigerant circulation amount shortage judgement “9F”
Indoor/outdoor communication short circuit “95”
Central management communication short circuit “97”
Central management address set-up fault “98”
External input display fault “b5”
(Low level refrigerant leak if RBC-RD1-PE fitted)
External interlock display fault
“b6”
(High level refrigerant leak if RBC-RD1-PE fitted)
Indoor Unit miswiring/misconnection
“9A”
Indoor PC board short circuit “12”
Outdoor IPDU
High pressure SW circuit “21”
G-Tr short-circuit protective operation “14”
Current detection circuit “17”
Compressor error “1d”
Compressor breakdown “1F”
TH sensor alarm “d3”
Abnormal overheat of heat sink “dA”
Inverter outdoor unit
Fixed-
speed
outdoor
unit
Inverter serial signal short circuit “04”
(High level refrigerant leak if RBC-RD2-PE fitted)
Four-way valve alarm
“08”
Outdoor heat exchanger sensor (TE1) short circuit “18”
Discharge temp. sensor (TD1) short circuit “A0”
Discharge temp. sensor (TD2) short circuit “A1”
Suction temp. sensor (TS) short circuit “A2”
High pressure sensor (Pd) short circuit “AA”
Low pressure sensor (Ps) short circuit “b4”
Pressure sensor (Pd/Ps) miswiring “Ab”
Discharge temp. (TD1) alarm “A6”
Discharge temp. (TD2) alarm “bb”
Low Hz time discharge temp. (TD1) alarm “AE”
Suction temp. (TS) alarm “A7”
High pressure (Pd) protective operation “22”
Low pressure (Ps) protective operation “bE”
Fixed-speed 1 high pressure SW system alarm “E1”
Fixed-speed 2 high pressure SW system alarm “F0”
Fixed-speed 1 IOL, OCR alarm “E6”
Fixed-speed 2 IOL, OCR alarm “F1”
Inverter IOL short circuit “E5”
Mg-SW protective operation “bd”
Outdoor Unit power source phase order miswiring “AF”
Extension IC, EEPROM short circuit “1C”
Indoor/Outdoor error “Eb”
Indoor/Outdoor communication short circuit “95”
No. of connected indoor units over capacity “96”
Connected indoor units over capacity “89”
Outdoor unit back-up operation prevented “8c”
Reduction in the number of connected outdoor units “8d”
Outdoor unit connection over limit “8E”
Slave outdoor address incorrect “8F”
Master outdoor unit set-up alarm “d1”
Server outdoor unit error “d2”
Oil temp. (TK1) sensor alarm “d4”
Oil temp. (TK2) sensor alarm “d5”
Oil temp. (TK3) sensor alarm “d6”
Low oil level detection “d7”
Oil temp. (TK1) detection alarm “d8”
Oil temp. (TK2) detection alarm “d9”
SV3C valve blockage detection “db”
SV3C valve leakage detection “dC”
Outdoor PMV refrigerant leakage detection “dd”
Indoor address undefined* “dE”
Outdoor address undefined* “dF”
Missing phase “87”
Outdoor unit interface segment CHECK code
-
-
“18”
“A0”
“A1”
“A2”
“AA”
“b4”
“Ab”
“A6”
“bb”
“AE”
“A7”
“22”
“bE”
“E1”
“F0”
“E6”
“F1”
-
“bd”
“AF”
“1C”
-
-
-
-
-
-
-
-
“d1”
-
“d4”
“d5”
“d6”
“d7”
“d8”
“d9”
“db”
“dC”
“dd”
-
-
“87”
STANDBY
display
○○
○
○ ○ ○ ○
○ ○ ○
*: No display on the remote controller
NOTE:
To retrieve fault codes, ensure rotary switches 1, 2 and 3 on the Outdoor Interface PCB (MCC-1343-01) are all set
to 1 (factory default setting).
Individual Indoor Fault Codes can be retrieved by referring to page 70.