Toshiba MMU-AP0074YH-E Service Manual page 88

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
SMMS
(1 series)
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
SMMS
(1 series)
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
H16 H16
SMMS-i
(4 series)
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
Location
AI-NET central
of Description
control
detection
remote
controller
I/F Oil detection
circuit error
I/F Oil detection
circuit error
I/F Oil level
detection
circuit error
d7
System Error detection
status condition(s)
All stop The temperature
change of TK1
cannot be detected
even after
Compressor 1 starts
operating.
All stop The temperature
change of TK2
cannot be detected
even after
Compressor 2 starts
operating.
The temperature
change of TK3
cannot be detected
even after
Compressor 3 starts
operating.
The temperature
change of TK4
cannot be detected
even after
Compressor 4 starts
operating, or the
temperature
difference from that
of the other TK
sensor changes only
in the specified
range for a given
time or longer.
All stop No temperature
change is detected
by TK1 despite
compressor 1 having
been started.
No temperature
change is detected
by TK2 despite
compressor 2 having
been started.
No temperature
change is detected
by TK3 despite
compressor 3 having
been started.
87
Check items (locations)
• Check the TK1 sensor installation.
• Check the TK1 sensor resistant
characteristics.
• Check the misconnection of TK1, TK2,
TK3, or TK4.
• Check the SV3E valve error.
• Check the oil circuit capillary clogging
and non-return valve error.
• Check the hibernating refrigerant in
compressor.
• Check the TK2 sensor installation.
• Check the TK2 sensor resistant
characteristics.
• Check the misconnection of TK1, TK2,
TK3, or TK4.
• Check the SV3E valve error.
• Check the oil circuit capillary clogging
and non-return valve error.
• Check the hibernating refrigerant in
compressor.
• Check the TK3 sensor installation.
• Check the TK3 sensor resistant
characteristics.
• Check the misconnection of TK1, TK2,
TK3, or TK4.
• Check the SV3E valve error.
• Check the oil circuit capillary clogging
and non-return valve error.
• Check the hibernating refrigerant in
compressor.
• Check the TK4 sensor installation.
• Check the TK4 sensor resistant
characteristics.
• Check the misconnection of TK1, TK2,
TK3, or TK4.
• Check the SV3E valve error.
• Check the oil circuit capillary clogging
and non-return valve error.
• Check the hibernating refrigerant in
compressor.
• 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.
• 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.
• 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.