– 69 –
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
H16
H16
SMMS
(1 series)
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
I/F
Oil detection
circuit error
All stop
The temperature change of
TK1 cannot be detected even
after Compressor 1 starts
operating.
• 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.
I/F
SMMS
(1 series)
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
Oil detection
circuit error
All stop
The temperature change of
TK2 cannot be detected even
after Compressor 2 starts
operating.
• 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.
I/F
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
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.
The temperature change of
TK3 cannot be detected even
after Compressor 3 starts
operating.
• 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.
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.
• 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.
Outdoor 7-segment display
Check
code
Sub-code
Main
remote
controller
