Toshiba Super MMU-AP0092H Service Manual page 99

Check code
Main Outdoor 7-segment display
remote
Check code Auxiliary code
controller
H04 H04 —
H06 H06 —
H07 H07 —
H08 H08 01: TK1 sensor error
02: TK2 sensor error
03: TK3 sensor error
04: TK4 sensor error
Detected
Check code name Status
position
I/F Compressor 1 case All stop
thermo operation
I/F Low-pressure protective All stop
operation
I/F Protection for oil level All stop
drop detection
I/F Oil level detective temp All stop
sensor error
All stop
All stop
All stop
Error detection condition
Compressor 1 case thermostat performed
protective operation.
Low-pressure Ps detected operation lower than
0.02MPa.
The operating compressor detected oil shortage
continuously for 2 hours.
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Resistance value of sensor is infinite or zero.
(Open/Short)
• Resistance value of sensor is infinite or zero.
(Open/Short)
Check item (position)
• Check compressor 1 case thermo circuit. (Connector, cable, 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 4-way valve error.
• Check refrigerant shortage.
• Check full opening of service valve.
(Discharge gas, suction gas and liquid side)
• Check outdoor PMV clogging. (PMV1, 2)
• Check SV2 circuit and SV4 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.
(All heating, mainly heating, part cooling operation)
• 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.
• Check connection of TK1 sensor connector.
• Check characteristics of TK1 sensor resistance value.
• Check outdoor P .C. board (I/F) error.
• Check connection of TK2 sensor connector.
• Check characteristics of TK2 sensor resistance value.
• Check outdoor P .C. board (I/F) error.
• Check connection of TK3 sensor connector.
• Check characteristics of TK3 sensor resistance value.
• Check outdoor P .C. board (I/F) error.
• Check connection of TK4 sensor connector.
• Check characteristics of TK4 sensor resistance value.
• Check outdoor P .C. board (I/F) error.