Toshiba MMK-AP0074MH-E Service Manual page 63

Check code
Wired Outdoor 7-segment display
remote
Check code Auxiliary code
controller
P01 — —
P03 P03 —
P04
P04 01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
P05 P05 00:
01: Compressor 1
02: Compressor 2
03: Compressor 3
P07 P07 01: Compressor 1 side
02: Compressor 2 side
03: Compressor 3 side
P10 P10 Indoor address with
trouble
P12 — —
Detected
Check code name Status
position
Indoor Indoor fan motor error Corresponding
unit only stops.
I/F Discharge temp TD1 error All stop
All stop
I/F Actuation of high-pressure
SW
I/F Open phase shortage/phase All stop
sequence detection
Inverter DC voltage (Vdc)
error (Compressor)
IPDU Heat sink overheat error All stop
I/F
Indoor Indoor overflow error All stop
Indoor Indoor fan motor error Corresponding
unit only stops.
Error detection condition
• Check the lock of fan motor (AC fan).
• Check cabling.
Discharge temp (TD1) exceeded 115°C. • Check full opening of outdoor service valves (Gas side, Liquid side).
• Check clogging of outdoor PMV. (PMV1,2, 4)
• 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 SV41, SV42 and SV43)
High-pressure SW actuated. • Check connection of high-pressure SW connector.
• 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.
• Open phase was detected when the • Check outdoor P .C. board (I/F) error.
power turned on.
• Overvoltage/Volt shortage was
detected in inverter DC voltage
IGBT built-in temp sensor (TH) was • Check power voltage.
overheated.
• Check outdoor fan system error.
• 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).
• Float switch operated. • Check the float switch connector.
• Float switch circuit disconnected or • Check operation of drain pump unit.
the connector came off.
• Check the drain pump circuit.
• Check clogging of drain pipe.
• Check indoor P .C. board error.
• The value of motor speed deviated • Check connection of fan connector and wiring.
from target value was detected for
• Check fan motor error.
certain time.
• Check indoor P .C. board error.
• Over-current protection operated.
• Check influence of outside air control.
Check item (position)