Toshiba MMD- AP0724H2UL, Service Manual

Page: 63 / 84

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Check code
Location
of
detection
Description
System
status
Error detection
condition(s)
Check items (locations) Main
remote
controller
Outdoor 7-segment display
Check code Sub-code
H16 H16
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
05: TK5 oil
circuit error I/F Oil level
detection
circuit error All stop No temperature
change is detected
by TK1 despite
compressor 1 having
been started. • Check for disconnection of TK1 sensor.
• Check resistance characteristics of
TK1 sensor.
• Check for connection error involving
TK1, TK2, TK3, TK4, and TK5 sensors
• Check for faulty operation in SV3E or
SV3F valve.
• Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
• Check for refrigerant entrapment inside
compressor.
No temperature
change is detected
by TK2 despite
compressor 2 having
been started. • Check for disconnection of TK2 sensor.
• Check resistance characteristics of
TK2 sensor.
• Check for connection error involving
TK1, TK2, TK3, TK4, and TK5 sensors
• Check for faulty operation in SV3E or
SV3F valve.
• Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
• Check for refrigerant entrapment inside
compressor.
No temperature
change is detected
by TK3 despite
compressor 3 having
been started. • Check for disconnection of TK3 sensor.
• Check resistance characteristics of
TK3 sensor.
• Check for connection error involving
TK1, TK2, TK3, TK4, and TK5 sensors
• Check for faulty operation in SV3E or
SV3F valve.
• Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
• Check for refrigerant entrapment inside
compressor.
No temperature
change is detected
by TK4 despite
compressor having
been started. • Check for disconnection of TK4 sensor.
• Check resistance characteristics of
TK4 sensor.
• Check for connection error involving
TK1, TK2, TK3, TK4, and TK5 sensors
• Check for faulty operation in SV3E or
SV3F valve.
• Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
• Check for refrigerant entrapment inside
compressor.
No temperature
change is detected
by TK5 despite
compressor having
been started. • Check for disconnection of TK5 sensor.
• Check resistance characteristics of
TK5 sensor.
• Check for connection error involving
TK1, TK2, TK3, TK4, and TK5 sensors
• Check for faulty operation in SV3E
valve.
• Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
• Check for refrigerant entrapment inside
compressor.
H25 H25 –
I/F TD3 sensor
miswiring
(incomplete
insertion) All stop Air discharge
temperature (TD3)
does not increase
despite compressor
3 being in operation. • Check installation of TD3 sensor.
• Check connection of TD3 sensor
connector and wiring.
• Check resistance characteristics of
TD3 sensor.
• Check for defect in outdoor P.C. board
(I/F).