Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 186 / 333

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Check code
Location
of
detection
System status Description
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display Main
remote
controller
Check
code
Sub-code
I/F 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
H16 H16
H25 — H25
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 TD1,
TD2, TD3, 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 TD1,
TD2, TD3, 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 TD1,
TD2, TD3, 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 TD1,
TD2, TD3,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.
Or difference from
other TK sensor
changes within
specified range only
for over the specified
period. • Check for disconnection of TK5 sensor.
• Check resistance characteristics of TK5
sensor.
• Check for connection error involving TD1,
TD2, TD3, 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.
Oil level
detection
circuit error
I/F All stop Discharge
temperature (TD3)
does not increase
despite compressor
3 being in operation. • Check installation of TD3, TK1, TK2,
TK3 , TK4, TK5 sensor.
• Check connection of TD3, TK1, TK2,
TK3 , TK4, TK5 sensor
connector and wiring.
• Check resistance characteristics of TD3
sensor.
• Check for defect in outdoor P.C. board
(I/F). TD3 sensor
miswiring
(incomplete
insertion)
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