Toshiba SUPER MMK-AP0073H (IN) Service Manual page 68

Check code
Main
Outdoor 7-segment display
remote
controller Check code Sub-code
L30 L30 Detected indoor address
— L31 —
P01 — —
P03 P03 —
P04 P04 01: Compressor 1 side
02: Compressor 2 side
P05 P05 01: Power supply open phase
02: Power supply negative phase
Detected
AI-NET Check code name
position
central control
remote controller
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
AF I/F Open phase negative phase
Status Error detection condition
Corresponding • Outside error input terminal
unit only stops. Detected signal to (CN80) for
more 1 minute
Operation P .C. board (I/F) parts error
continues.
Corresponding
unit only stops.
All stop Discharge temp (TD1)
exceeded 115°C.
All stop High-pressure SW actuated.
All stop • Open phase was detected
when the power turned on.
• Negative phase was detected
when the power turned on.
Check item (position)
n Outside device is connected to connector (CN80):
1) Check outside device error.
2) Check indoor P .C. board error.
n Outside device is not connected to connector (CN80):
1) Check indoor P .C. board error.
Check indoor (I/F) P .C. board.
• Check the lock of fan motor (AC fan).
• Check wiring.
• Check full opening of outdoor service valves
(Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2)
• Check characteristics of TD1 sensor resistance value.
• Check refrigerant shortage.
• Check 4-way valve error.
• Check leakage of SV41 circuit.
• Check SV4 circuit.
(Miscabling and misinstallation of SV41 and SV42)
• Check Pd pressure sensor error.
• 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. (PMV1,2)
• 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 miswiring 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.
• Check outdoor power line.
• Check outdoor P .C. board (I/F) error.