Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 123

Check code
Outdoor 7-segment display
Wired
remote central control
controller Check code remote controller
Auxiliary code
P19 P19 Detected outdoor
unit No.
P20 P20 —
*A: Fan motor
P22 P22
current error
*d: Fan motor
lock
P26 P26 01: Compressor 1
P29 P29 01: Compressor 1
P31 — —
Detected Check code
AI-NET
position name
8 I/F 4-way valve
operation error
22 I/F High-pressure
protective
operation
FAN- Outdoor fan
1A
IPDU IPDU error
G-Tr short-circuit
protection error
14 IPDU
16 IPDU Compressor
position detection
circuit error
47 Indoor Other indoor error Corresponding
(Group follower unit only stops.
unit error)
Status Error detection condition
All stop When abnormal refrigerating cycle data was
detected in heating
All stop Pd sensor detected 3.6MPa or more.
(Auxiliary code: *A)
All stop
• Short-circuit current was detected when 2
seconds or more passed after start time.
• Over-current was detected when 30
seconds or more passed after start time.
All stop (Auxiliary code: *d)
• Abnormal current was detected within 30
seconds after start time.
All stop Instantaneous over-current was detected
when compressor started.
All stop Position detected was not normal.
E07/L07/L03/L08 was detected when other
indoor unit in the group was defective.
Check item (position)
• Error of 4-way valve error
• Check coil error and connector connection of 4-way valve.
• Check characteristics of TS1/TE1 sensor resistance value.
• Check characteristics of Pd, Ps pressure sensor output voltage.
• Check misconnection of TE1 and TL sensors.
• Check Pd pressure sensor error.
• Check full opening of 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 air short-circuiting in outdoor unit.
• Check clogging of SV2 circuit.
• Check outdoor P .C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check valve opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of check valve of discharge pipe.
• Check circuit of gas balance SV4 valve.
• Check mispiping of discharge gas/suction gas main pipe.
• Check operation error of check valve of discharge gas pipe.
• Check clogging of circuit at auxiliary heat exchanger side.
(Miswiring, Disconnection, Wiring missing)
• Check circuit of SV5 valve.
• Check refrigerant overcharge.
• Check power supply voltage.
• Check fan IPDU error.
• Check fan motor. (Lock, phase missing)
• Check cause of abnormal overload at start time.
• Check connection of connector to fan motor.
• Check connector connection and wiring on IPDU P .C. board.
• Check compressor error and defect of compressor coil.
• Check outdoor P .C. board (IPDU) error.
• Check connector connection and wiring.
• Check compressor error and defect of compressor coil.
• Check P .C. board (IPDU) error.
• Check indoor P .C. board.