Toshiba SUPER MMK-AP0073H (IN) Service Manual page 65

Check code
Main
Outdoor 7-segment display
remote
controller Check code Sub-code
H02 H02 01: Compressor 1 side
02: Compressor 2 side
H03 H03 01: Compressor 1 side
02: Compressor 2 side
H04 H04 —
H06 H06 —
H07 H07 —
Detected
AI-NET Check code name
position
central control
remote controller
1d IPDU Compressor error (lock)
MG-SW error
OCR operation
17 IPDU Current detection circuit
system error
44 I/F Compressor 1 case
thermo operation
20 I/F Low-pressure protective
operation
d7 I/F Protection for oil level
drop detection
Status Error detection condition
All stop Over-current was detected several
seconds after header compressor
had started.
All stop While header compressor stopped,
current flowed more than the
specified current and was detected.
All stop Compressor 1 case thermostat
performed protective operation.
All stop Low-pressure Ps detected operation
lower than 0.02MPa.
All stop The operating compressor detected
oil shortage continuously for 2 hours.
Check item (position)
• Check compressor error.
• Check power voltage. (AC380 –10%, 415V +10%).
• Check cable of compressor and phase-missing.
• Check connector/terminal connection on IPDU P .C. board.
• Check conduction of case heater.
(Check activation error due to liquid stagnation in compressor.)
• Check outdoor P .C. board (IPDU) error.
• Check outdoor MG-SW or OCR.
• Check wiring of current detection circuit system.
• Check outdoor P .C. board (IPDU) error.
• Check compressor 1 case thermo circuit.
(Connector, wire, P .C. board)
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV41 circuit leakage.
• Check miscabling/misinstallation of SV41 and SV42.
• Check valve open status of indoor PMV.
• Check compressor error.
• Check 4-way valve error.
• Check refrigerant shortage.
• Check full opening of service valve. (Gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV41 circuit and SV42 circuit error.
• Check low-pressure Ps sensor error.
• Check indoor air filter clogging.
• Check valve open of indoor PMV.
• Check refrigerant pipe clogging.
• Check outdoor fan operation. (In heating mode)
• Check refrigerant shortage.
<Check all the outdoor units in the corresponding line.>
• Check full opening of service valve of balance pipe.
• Check connection and installation of TK1, TK2, TK3, and TK4 sensors.
• Check characteristics of TK1, TK2, TK3, and TK4 resistance values.
• Check gas leak and oil leak in the same line.
• Check refrigerant stagnation in compressor.
• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.
• Check clogging of oil separator oil return circuit.
• Check clogging of oil-equation circuit.
MG-SW : Magnet Switch
OCR : Over-current Relay