Toshiba MMU-AP0074YH-E Service Manual page 87

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
H14 H14 –
H15 H15 –
Location
AI-NET central
of Description
control
detection
remote
controller
I/F Compressor 2
case thermo
activation
I/F TD2 sensor
miswiring
(incomplete
insertion)
System Error detection
status condition(s)
All stop Compressor 2 case
thermo was
activated.
All stop Air discharge
temperature of (TD2)
does not increase
despite compressor
2 being in operation.
86
Check items (locations)
• Check Compressor 2 case thermo
circuit.
(Connector, Wiring, Circuit board)
• Open and check the service valve.
(Gas side, Liquid side)
• Check the outdoor PMV clogging
(PMV1, 2).
• Check the SV42 circuit.
• Check the SV4 circuit (SV41 / 42
miswiring).
• Check the opening status of indoor
PMV.
• Check the four-way valve error.
• Check the refrigerant shortage.
• Check installation of TD2 sensor.
• Check connection of TD2 sensor connector
and wiring.
• Check resistance characteristics of TD2
sensor.
• Check for defect in outdoor P.C. board (I/F).