Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 121

Check code
Wired Outdoor 7-segment display
remote
controller Check code Auxiliary code
L29 L29 01: Comp IPDU error
02: Fan 1 IPDU error
03: Comp + Fan 1 IPDU error
04: Fan 2 IPDU error
05: Comp + Fan 2 IPDU error
06: Fan 1 + Fan 2 IPDU error
07: All IPDU error or communication error
between IPDU and I/F P .C. board, or
outdoor I/F P .C. board error
L30 L30 Detected indoor address
— L31 —
P01 — —
P03 P03 —
P04 P04 01: Compressor 1
P07 P07 01: Compressor 1
Detected
AI-NET Check code name
position
central control
remote controller
CF I/F IPDU quantity error
b6 Indoor Interlock in indoor unit from
outside
— I/F Extended IC (Integrated
Circuit) error
11 Indoor Indoor fan motor error
1E I/F Discharge temp TD1 error
21 I/F Actuation of high-pressure
SW
1C IPDU Heat sink overheat error
I/F
Error detection
Status
condition
All stop No. of IPDU units • Check model setup for outdoor I/F service P .C. board.
detected when power
• Check connection of UART communication connector.
was turned on were
• Check IPDU, fan IPDU, and I/F P .C. board error.
less.
Note)
UART: Universal Asynchronous Receiver Transmitter
n Outside device is connected to connector (CN80):
Corresponding • Outside error input
unit only stops. terminal
1) Check outside device error.
Detected signal to
2) Check indoor P .C. board error.
(CN80) for more than
n Outside device is not connected to connector (CN80):
1 minute
1) Check indoor P .C. board error.
Operation P .C. board (I/F) parts Check indoor (I/F) P .C. board.
continues. error
Corresponding • Check the lock of fan motor (AC fan).
unit only stops.
• Check cabling.
All stop Discharge temp (TD1) • Check full opening of outdoor service valves (Gas side, Liquid side).
exceeded 115°C.
• Check clogging of outdoor PMV.
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check SV4 circuit. (Miswiring and misinstallation of SV4)
• Check leakage of SV5 circuit.
All stop High-pressure SW • Check Pd pressure sensor error.
actuated.
• Check full opening of outdoor service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV.
• Check clogging of indoor/outdoor heat exchangers.
• Check short-circuiting of outdoor suction/discharge air.
• Check clogging of SV2 circuit.
• Check outdoor P .C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check SV4 valve circuit.
• Check SV5 valve circuit.
• Check refrigerant overcharge.
All stop IGBT built-in temp • Check power voltage.
sensor (TH) was
• Check outdoor fan system error.
overheated.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink. (Check screwing and contact.)
• Check IPDU error.(IGBT built-in temp sensor (TH) error).
Check item (position)